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AJAX练习

1，在注册页面通过AJAX验证用户注册ID是否已经存在

View Code

  1 <script language="javascript">
  2         var xmlHttp;
  3         var flag2=false;
  4         function creatXMLHttp()
  5         {
  6             if (window.XMLHttpRequset)            
  7             {
  8                 xmlHttp=new XMLHttpRequest();                
  9             }
 10             else
 11             {
 12                 xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");                
 13             }    
 14         }
 15         
 16         function checkUserId(userid)
 17         {
 18             creatXMLHttp();
 19             xmlHttp.open("POST","RegisterUserServlet?status=checkuserid&id="+userid);            
 20             xmlHttp.onreadystatechange=checkUserIdCallBack;
 21             xmlHttp.send(null);
 22         }
 23         
 24         function checkUserIdCallBack()
 25         {
 26             if(xmlHttp.readyState==4&&xmlHttp.status==200)
 27             {
 28                 var flag=xmlHttp.responseText;                
 29                 if(flag=="true")
 30                 {
 31                     flag2=false;
 32                     document.getElementById("userid_pic").innerHTML="<img src=\"<%=request.getContextPath()%>/images/wrong.gif\"/>"+"<font color=\"red\">用户编号已经被注册!</font>"
 33                 }
 34                 else
 35                 {                    
 36                     flag2=true;
 37                     document.getElementById("userid_pic").innerHTML="<img src=\"<%=request.getContextPath()%>/images/right.gif\"/>"+"<font color=\"green\">恭喜，用户编号未被注册!</font>"
 38                 }
 39             }
 40         }
 41         function checkRes()
 42         {
 43             return flag2;
 44         }
 45         function validateUserId(userid)
 46         {    
 47             if(!/^\d{4}$/.test(userid))
 48             {
 49                 document.getElementById("userid_pic").innerHTML="<img src=\"<%=request.getContextPath()%>/images/wrong.gif\"/>"+"<font color=\"red\">用户编号必须是四位数字!</font>"
 50                 return false;
 51             }
 52             else
 53             {
 54                 checkUserId(userid);                
 55                 return true;
 56             }
 57         }
 58         function validateUsername(username)
 59         {    
 60             if(username=="")
 61             {
 62                 document.getElementById("username_pic").innerHTML="<img src=\"<%=request.getContextPath()%>/images/wrong.gif\"/>"+"<font color=\"red\">用户编号不能为空!</font>"
 63                 return false;
 64             }
 65             else
 66             {
 67                 document.getElementById("username_pic").innerHTML="<img src=\"<%=request.getContextPath()%>/images/right.gif\"/>"+"<font color=\"green\">用户名输入正确!</font>"
 68                 return true;
 69             }
 70         }
 71         function validatePassword(password)
 72         {    
 73             if(password=="")
 74             {
 75                 document.getElementById("password_pic").innerHTML="<img src=\"<%=request.getContextPath()%>/images/wrong.gif\"/>"+"<font color=\"red\">密码不能为空!</font>"
 76                 return false;
 77             }
 78             else
 79             {
 80                 document.getElementById("password_pic").innerHTML="<img src=\"<%=request.getContextPath()%>/images/right.gif\"/>"+"<font color=\"green\">密码输入正确!</font>"
 81                 return true;
 82             }
 83         }
 84         function validatePasswordAg(passwordag)
 85         {    
 86             if(passwordag=="")
 87             {
 88                 document.getElementById("passwordag_pic").innerHTML="<img src=\"<%=request.getContextPath()%>/images/wrong.gif\"/>"+"<font color=\"red\">输入密码不能为空!</font>"
 89                 return false;
 90             }
 91             else
 92             {
 93                 if(document.getElementById("password").value!=passwordag)
 94                 {
 95                     document.getElementById("passwordag_pic").innerHTML="<img src=\"<%=request.getContextPath()%>/images/wrong.gif\"/>"+"<font color=\"red\">输入密码与上一次输入不一致!</font>"
 96                     return false;
 97                 }
 98                 else
 99                 {
100                     document.getElementById("passwordag_pic").innerHTML="<img src=\"<%=request.getContextPath()%>/images/right.gif\"/>"+"<font color=\"green\">密码输入正确!</font>"
101                     return true;
102                 }
103             }
104         }
105         function validateAddress(address)
106         {    
107             if(address=="")
108             {
109                 document.getElementById("address_pic").innerHTML="<img src=\"<%=request.getContextPath()%>/images/wrong.gif\"/>"+"<font color=\"red\">联系地址不能为空!</font>"
110                 return false;
111             }
112             else
113             {
114                 document.getElementById("address_pic").innerHTML="<img src=\"<%=request.getContextPath()%>/images/right.gif\"/>"+"<font color=\"green\">联系地址输入正确!</font>"
115                 return true;
116             }
117         }
118         function validateTelephone(telephone)
119         {    
120             if(telephone=="")
121             {
122                 document.getElementById("telephone_pic").innerHTML="<img src=\"<%=request.getContextPath()%>/images/wrong.gif\"/>"+"<font color=\"red\">联系方式不能为空!</font>"
123                 return false;
124             }
125             else
126             {
127                 document.getElementById("telephone_pic").innerHTML="<img src=\"<%=request.getContextPath()%>/images/right.gif\"/>"+"<font color=\"green\">联系方式输入正确!</font>"
128                 return true;
129             }
130         }
131         function validateZipcode(zipcode)
132         {    
133             if(zipcode=="")
134             {
135                 document.getElementById("zipcode_pic").innerHTML="<img src=\"<%=request.getContextPath()%>/images/wrong.gif\"/>"+"<font color=\"red\">邮政编码不能为空!</font>"
136                 return false;
137             }
138             else
139             {
140                 if(!/^\d{6}$/.test(zipcode))
141                 {
142                     document.getElementById("zipcode_pic").innerHTML="<img src=\"<%=request.getContextPath()%>/images/wrong.gif\"/>"+"<font color=\"red\">邮政编码格式不正确!</font>"
143                     return false;
144                 }
145                 else
146                 {
147                     document.getElementById("zipcode_pic").innerHTML="<img src=\"<%=request.getContextPath()%>/images/right.gif\"/>"+"<font color=\"green\">邮政编码输入正确!</font>"
148                     return true;
149                 }
150             }
151         }
152         function validate(formValue)
153         {
154             return     checkRes()&&validateUserId(formValue.id.value)&&
155             validateUsername(formValue.username.value)&&
156             validatePassword(formValue.password.value)&&
157             validatePasswordAg(formValue.passwordag.value)&&
158             validateAddress(formValue.address.value)&&
159             validateTelephone(formValue.telephone.value)&&
160             validateZipcode(formValue.zipcode.value);
161         }
162     </script>

　　RegisterUserServlet处理

View Code

  1 package org.xiong.demo.servlet;
  2 
  3 import java.io.IOException;
  4 import java.io.PrintWriter;
  5 
  6 import javax.servlet.ServletException;
  7 import javax.servlet.http.Cookie;
  8 import javax.servlet.http.HttpServlet;
  9 import javax.servlet.http.HttpServletRequest;
 10 import javax.servlet.http.HttpServletResponse;
 11 
 12 import org.xiong.demo.factory.DaoFactory;
 13 import org.xiong.demo.util.MessageUtil;
 14 import org.xiong.demo.vo.RegisterUser;
 15 
 16 public class RegisterUserServlet extends HttpServlet
 17 {
 18 
 19     public void doGet(HttpServletRequest request, HttpServletResponse response)
 20             throws ServletException, IOException
 21     {
 22         request.setCharacterEncoding("GBK");
 23         String page = "error.jsp";
 24         String status = request.getParameter("status");
 25         if (!("".equals(status) || status == null))
 26         {
 27             if ("check".equals(status))
 28             {
 29                 this.check(request, response);
 30             }
 31             if ("add".equals(status))
 32             {
 33                 this.add(request, response);
 34             }
 35             if ("checkuserid".equals(status))
 36             {
 37                 this.checkuserid(request, response);
 38             }
 39         }
 40         else
 41         {
 42             request.getRequestDispatcher(page).forward(request, response);
 43         }
 44 
 45     }
 46 
 47     public void doPost(HttpServletRequest request, HttpServletResponse response)
 48             throws ServletException, IOException
 49     {
 50         this.doGet(request, response);
 51     }
 52 
 53     public void checkuserid(HttpServletRequest request,
 54             HttpServletResponse response) throws ServletException, IOException
 55     {
 56         int id = 0;
 57         try
 58         {
 59             id = Integer.parseInt(request.getParameter("id"));            
 60         }
 61         catch (Exception ex)
 62         {
 63 
 64         }
 65         try
 66         {
 67             PrintWriter out = response.getWriter();
 68             RegisterUser user = DaoFactory.getUserDaoInstance().findById(id);
 69             if (user == null)
 70             {
 71                 response.setContentType("text/html;charset=GBK");                
 72                 out.print("false");                
 73                 out.close();
 74             }
 75             else
 76             {
 77                 out.print("true");
 78                 out.close();
 79             }
 80         }
 81         catch (Exception e)
 82         {
 83             e.printStackTrace();
 84         }
 85     }
 86 
 87     public void add(HttpServletRequest request, HttpServletResponse response)
 88             throws ServletException, IOException
 89     {
 90         String page = "error.jsp";
 91         RegisterUser user = new RegisterUser();
 92         int id = 0;
 93         try
 94         {
 95             id = Integer.parseInt(request.getParameter("id"));
 96         }
 97         catch (Exception ex)
 98         {
 99 
100         }
101         user.setId(id);
102         user.setUsername(request.getParameter("username"));
103         user.setPassword(request.getParameter("password"));
104         user.setAddress(request.getParameter("address"));
105         user.setTelephone(request.getParameter("telephone"));
106         user.setZipcode(request.getParameter("zipcode"));
107         user.setLastdate(new java.util.Date());
108         try
109         {
110             if (DaoFactory.getUserDaoInstance().doInsert(user))
111             {
112                 request.setAttribute("msg",
113                         MessageUtil.getMessage("register.add.true"));
114                 request.setAttribute("flag", true);
115                 page = "add_user_do.jsp";
116             }
117             else
118             {
119                 request.setAttribute("msg",
120                         MessageUtil.getMessage("register.add.fase"));
121                 request.setAttribute("flag", false);
122             }
123 
124         }
125         catch (Exception e)
126         {
127             e.printStackTrace();
128         }
129         request.getRequestDispatcher(page).forward(request, response);
130     }
131 
132     public void check(HttpServletRequest request, HttpServletResponse response)
133             throws ServletException, IOException
134     {
135         String page = "error.jsp";
136         String rand = (String) request.getSession().getAttribute("rand");
137         String userName = request.getParameter("username");
138         String userPass = request.getParameter("password");
139         String code = request.getParameter("code");
140         boolean flag = false;
141         long cookieTime = 0;
142         try
143         {
144             cookieTime = Long.parseLong(request.getParameter("saveTime"));
145         }
146         catch (Exception ex)
147         {
148 
149         }
150         if (("".equals(userName) || null == userName)
151                 || ("".equals(userPass) || null == userPass))
152         {
153             request.setAttribute("errMsg",
154                     MessageUtil.getMessage("check.input.null"));
155         }
156         else if ("".equals(code) || null == code)
157         {
158             request.setAttribute("errMsg",
159                     MessageUtil.getMessage("code.input.null"));
160         }
161         else if (!code.equalsIgnoreCase(rand))
162         {
163             request.setAttribute("errMsg",
164                     MessageUtil.getMessage("code.input.error"));
165         }
166         else
167         {
168             RegisterUser user = new RegisterUser();
169             user.setUsername(userName);
170             user.setPassword(userPass);
171             RegisterUser register = null;
172             try
173             {
174                 register = DaoFactory.getUserDaoInstance().findLongin(user);
175             }
176             catch (Exception e)
177             {
178                 e.printStackTrace();
179             }
180             if (register != null)
181             {
182                 if (register.getId() > 0 && code.equalsIgnoreCase(rand))
183                 {
184 
185                     request.getSession().setAttribute("username", userName);
186                     request.getSession().setAttribute("userid",
187                             register.getId());
188                     request.getSession().setAttribute("user", register);
189                     Cookie c1 = new Cookie("username", userName);
190                     Cookie c2 = new Cookie("password", userPass);
191                     c1.setMaxAge((int) cookieTime);
192                     c2.setMaxAge((int) cookieTime);
193                     response.addCookie(c1);
194                     response.addCookie(c2);
195                     flag = true;
196                 }
197                 else
198                 {
199                     request.setAttribute("errMsg",
200                             MessageUtil.getMessage("check.input.error"));
201                 }
202             }
203         }
204         if (flag)
205         {
206             page = "/register/welcome.jsp";
207             request.getRequestDispatcher(page).forward(request, response);
208         }
209         else
210         {
211             page = "login.jsp";
212             request.getRequestDispatcher(page).forward(request, response);
213         }
214     }
215 
216 }

　　注册页面

View Code

 1 <html>
 2 <head>
 3     <title>新用户注册页</title>
 4 <body>
 5     <center><h1>新用户注册</h1></center>
 6     <form action="RegisterUserServlet" method="post" onsubmit="return validate(this.value)"> 
 7         用&nbsp;户&nbsp;ID:<input type="text" name="id" onblur="validateUserId(this.value)"/><span id="userid_pic"><font color="red">*</font></span><br/>
 8         用&nbsp;户&nbsp;名:<input type="text" name="username" onblur="validateUsername(this.value)"/><span id="username_pic"><font color="red">*</font></span><br/>
 9         密&nbsp;&nbsp;&nbsp;&nbsp;码:<input type="password" name="password" onblur="validatePassword(this.value)"/><span id="password_pic"><font color="red">*</font></span><br/>
10         重复输入:<input type="password" name="passowrdag" onblur="validatePasswordAg(this.value)"/><span id="passwordag_pic"><font color="red">*</font></span><br/>
11         详细地址:<input type="text" name="address" onblur="validateAddress(this.value)"/><span id="address_pic"><font color="red">*</font></span><br/>
12         联系方式:<input type="text" name="telephone" onblur="validateTelephone(this.value)"/><span id="telephone_pic"><font color="red">*</font></span><br/>
13         邮政编码:<input type="text" name="zipcode" onblur="validateZipcode(this.value)"/><span id="zipcode_pic"><font color="red">*</font></span><br/>
14         <input type="hidden" name="status" value="add"/>
15         <input type="submit" value="注册" />&nbsp;&nbsp;<input type="reset" value="重置" />
16     </form>
17 </body>
18 </html>

2，通过AJAX生成option(生成部门列表和领导列表)

View Code

 1 <script language="javascript">
 2     var xmlHttp;
 3     function createXMLHttp()
 4     {
 5         if(window.XMLHttpRequest)
 6         {
 7             xmlHttp=new XMLHttpRequest();
 8         }
 9         else
10         {
11             xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
12         }
13     }
14     function findAllMgr()
15     {
16         createXMLHttp();
17         xmlHttp.open("POST", "EmpServlet?status=findallmgr");
18         xmlHttp.onreadystatechange=findAllMgrCallBack;
19         xmlHttp.send(null);
20     }
21     function findAllMgrCallBack()
22     {
23         if(xmlHttp.readystate==4&&xmlHttp.status==200)
24         {
25             var allMgr=xmlHttp.responseXML.getElementsByTagName("mgrs")[0].childNodes;
26             var select =document.getElementById("mgr");
27             select.length=1;
28             select.options[0].selected=true;            
29             for(var i=0;i<allMgr.length;i++)
30             {
31                 var emp=allMgr[i];
32                 var option=document.createElement("option");
33                 var empno=emp.getElementsByTagName("empno")[0].firstChild.nodeValue;
34                 var ename=emp.getElementsByTagName("ename")[0].firstChild.nodeValue;
35                 option.setAttribute("value",empno);
36                 option.appendChild(document.createTextNode(ename));
37                 select.appendChild(option);
38             }                
39         }
40     }
41     function findAllDept()
42     {
43         createXMLHttp();
44         xmlHttp.open("POST", "EmpServlet?status=findalldept");
45         xmlHttp.onreadystatechange=findAllDeptCallBack;
46         xmlHttp.send(null);
47     }
48     function findAllDeptCallBack()
49     {
50         if(xmlHttp.readystate==4&&xmlHttp.status==200)
51         {
52             var allDept=xmlHttp.responseXML.getElementsByTagName("alldept")[0].childNodes;
53             var select =document.getElementById("deptno");
54             select.length=1;
55             select.options[0].selected=true;
56             for(var i=0;i<allDept.length;i++)
57             {
58                 var dept=allDept[i];
59                 var option=document.createElement("option");
60                 var deptno=dept.getElementsByTagName("deptno")[0].firstChild.nodeValue;
61                 var dname= dept.getElementsByTagName("dname")[0].firstChild.nodeValue;
62                 option.setAttribute("value", deptno);
63                 option.appendChild(document.createTextNode(dname));
64                 select.appendChild(option)
65             }
66         }
67     }
68 </script>

　　EmpServlet处理

View Code

  1 package org.xiong.demo.servlet;
  2 
  3 import java.io.ByteArrayOutputStream;
  4 import java.io.IOException;
  5 import java.io.PrintWriter;
  6 import java.text.SimpleDateFormat;
  7 import java.util.Iterator;
  8 import java.util.List;
  9 
 10 import javax.servlet.ServletException;
 11 import javax.servlet.http.HttpServlet;
 12 import javax.servlet.http.HttpServletRequest;
 13 import javax.servlet.http.HttpServletResponse;
 14 
 15 import org.jdom.Document;
 16 import org.jdom.Element;
 17 import org.jdom.output.XMLOutputter;
 18 import org.lxh.smart.SmartUpload;
 19 import org.lxh.smart.SmartUploadException;
 20 import org.xiong.demo.dao.IEmpDao;
 21 import org.xiong.demo.factory.DaoFactory;
 22 import org.xiong.demo.util.MessageUtil;
 23 import org.xiong.demo.util.RandName;
 24 import org.xiong.demo.vo.Dept;
 25 import org.xiong.demo.vo.Emp;
 26 
 27 public class EmpServlet extends HttpServlet
 28 {
 29     private SmartUpload smart;
 30 
 31     public void doGet(HttpServletRequest request, HttpServletResponse response)
 32             throws ServletException, IOException
 33     {
 34         this.doPost(request, response);
 35     }
 36 
 37     public void doPost(HttpServletRequest request, HttpServletResponse response)
 38             throws ServletException, IOException
 39     {
 40         request.setCharacterEncoding("GBK");
 41         String path = "error.jsp";
 42         String status = request.getParameter("status");
 43         if ("".equals(status) || null == status)
 44         {
 45             smart = new SmartUpload();
 46             smart.initialize(super.getServletConfig(), request, response);
 47             try
 48             {
 49                 smart.upload();
 50                 status = smart.getRequest().getParameter("status");
 51             }
 52             catch (SmartUploadException e)
 53             {
 54                 e.printStackTrace();
 55             }
 56 
 57         }
 58         if (!("".equals(status) || null == status))
 59         {
 60             if ("list".equals(status))
 61             {
 62                 this.list(request, response);
 63             }
 64             if ("add".equals(status))
 65             {
 66                 this.add(request, response);
 67             }
 68             if ("update".equals(status))
 69             {
 70                 this.update(request, response);
 71             }
 72             if ("delete".equals(status))
 73             {
 74                 this.delete(request, response);
 75             }
 76             if ("deleteEmp".equals(status))
 77             {
 78                 this.deleteEmp(request, response);
 79             }
 80             if ("deptinfo".equals(status))
 81             {
 82                 this.deptinfo(request, response);
 83             }
 84             if ("empinfo".equals(status))
 85             {
 86                 this.empinfo(request, response);
 87             }
 88             if ("findallmgr".equals(status))
 89             {
 90                 this.findallmgr(request, response);
 91             }
 92             if ("findalldept".equals(status))
 93             {
 94                 this.findalldept(request, response);
 95             }
 96 
 97         }
 98         else
 99         {
100             request.getRequestDispatcher(path).forward(request, response);
101         }
102     }
103 
104     public void findalldept(HttpServletRequest request,
105             HttpServletResponse response) throws ServletException, IOException
106     {
107         response.setContentType("text/xml;charset=GBK");
108         PrintWriter out = response.getWriter();
109         ByteArrayOutputStream bos = new ByteArrayOutputStream();
110         try
111         {
112             List<Dept> allDept = DaoFactory.getDeptDaoInstance().findAll("");
113             Iterator<Dept> iterDept = allDept.iterator();
114             Element root = new Element("alldept");
115             Document doc = new Document(root);
116             while (iterDept.hasNext())
117             {
118                 Dept d = iterDept.next();
119                 Element dept = new Element("dept");
120                 Element deptno = new Element("deptno");
121                 Element dname = new Element("dname");
122                 deptno.setText(d.getDeptno() + "");
123                 dname.setText(d.getDname());
124                 dept.addContent(deptno);
125                 dept.addContent(dname);
126                 root.addContent(dept);
127             }
128             XMLOutputter xmlout = new XMLOutputter();
129             xmlout.setFormat(xmlout.getFormat().setEncoding("GBK"));
130             xmlout.output(doc, bos);
131             out.print(bos);
132         }
133         catch (Exception e)
134         {
135             e.printStackTrace();
136         }
137         finally
138         {
139             bos.close();
140             out.close();
141         }
142 
143     }
144 
145     public void findallmgr(HttpServletRequest request,
146             HttpServletResponse response) throws ServletException, IOException
147     {
148         response.setContentType("text/xml;charset=GBK");
149         PrintWriter out = response.getWriter();
150         ByteArrayOutputStream bos = new ByteArrayOutputStream();
151         try
152         {
153             List<Emp> allEmp = DaoFactory.getEmpDaoInstance().findAll("");
154             Element root = new Element("mgrs");
155             Document doc = new Document(root);
156             Iterator<Emp> iter = allEmp.iterator();
157             while (iter.hasNext())
158             {
159                 Emp e = iter.next();
160                 Element emp = new Element("emp");
161                 Element empno = new Element("empno");
162                 Element ename = new Element("ename");
163                 empno.setText(e.getEmpno() + "");
164                 ename.setText(e.getEname());
165                 emp.addContent(empno);
166                 emp.addContent(ename);
167                 root.addContent(emp);
168             }
169             XMLOutputter xmlout = new XMLOutputter();
170             xmlout.setFormat(xmlout.getFormat().setEncoding("GBK"));
171             xmlout.output(doc, bos);
172             out.print(bos);
173         }
174         catch (Exception e)
175         {
176             e.printStackTrace();
177         }
178         finally
179         {
180             bos.close();
181             out.close();
182         }
183 
184     }
185 
186     public void list(HttpServletRequest request, HttpServletResponse response)
187             throws ServletException, IOException
188     {
189         String path = "error.jsp";
190         int currentPage = 1;
191         int lineSize = 3;
192         long allRecorders = 0;
193         String keyword = null;
194         int count = 0;
195         try
196         {
197             currentPage = Integer.parseInt(request.getParameter("cp"));
198             lineSize = Integer.parseInt(request.getParameter("ls"));
199             keyword = request.getParameter("kw");
200         }
201         catch (Exception ex)
202         {
203         }
204         if (keyword == null)
205         {
206             keyword = "";
207         }
208         IEmpDao dao = DaoFactory.getEmpDaoInstance();
209         try
210         {
211             java.util.List<Emp> allList = dao.findAll(keyword, currentPage,
212                     lineSize);
213             allRecorders = dao.getAllCount(keyword);
214             request.setAttribute("allList", allList);
215             request.setAttribute("allRecorders", allRecorders);
216             request.setAttribute("currentPage", currentPage);
217             request.setAttribute("lineSize", lineSize);
218             path = "fuck_page_source.jsp";
219         }
220         catch (Exception e)
221         {
222             e.printStackTrace();
223         }
224         request.getRequestDispatcher(path).forward(request, response);
225     }
226 
227     public void add(HttpServletRequest request, HttpServletResponse response)
228             throws ServletException, IOException
229     {
230         String path = "error.jsp";
231         int cp = Integer.parseInt(smart.getRequest().getParameter("cp"));
232         int ls = Integer.parseInt(smart.getRequest().getParameter("ls"));
233         int empno = Integer.parseInt(smart.getRequest().getParameter("empno"));
234         String ename = smart.getRequest().getParameter("ename");
235         String job = smart.getRequest().getParameter("job");
236         int mgr = Integer.parseInt(smart.getRequest().getParameter("mgr"));
237         java.sql.Date hiredate = null;
238         try
239         {
240             hiredate = new java.sql.Date(new SimpleDateFormat("yyyy-MM-dd")
241                     .parse(smart.getRequest().getParameter("hiredate"))
242                     .getTime());
243         }
244         catch (Exception ex)
245         {
246 
247         }
248         float sal = Float.parseFloat(smart.getRequest().getParameter("sal"));
249         float comm = Float.parseFloat(smart.getRequest().getParameter("comm"));
250         int deptno = Integer
251                 .parseInt(smart.getRequest().getParameter("deptno"));
252         String note = smart.getRequest().getParameter("note");
253 
254         Emp emp = new Emp();
255         emp.setEmpno(empno);
256         emp.setEname(ename);
257         emp.setJob(job);
258 
259         Emp empmgr = new Emp();
260         empmgr.setEmpno(mgr);
261         emp.setEmpmgr(empmgr);
262 
263         emp.setHiredate(hiredate);
264         emp.setSal(sal);
265         emp.setComm(comm);
266 
267         Dept dept = new Dept();
268         dept.setDeptno(deptno);
269         emp.setDept(dept);
270         emp.setNote(note);
271 
272         String extName = null;
273         String fileName = null;
274         String pathName = null;
275         if (smart.getFiles().getSize() > 0)
276         {
277             RandName rn = new RandName(request.getRemoteAddr());
278             extName = "." + smart.getFiles().getFile(0).getFileExt();// 得到上传文件的扩展名
279             fileName = rn.getRandName();// 生成文件名
280             fileName += extName;
281             pathName = this.getServletContext().getRealPath("/") + "product"
282                     + java.io.File.separator + "upload"
283                     + java.io.File.separator + fileName;
284             emp.setPhoto(fileName);
285         }
286         else
287         {
288             emp.setPhoto("nophoto.jpg");
289         }
290 
291         try
292         {
293             if (DaoFactory.getEmpDaoInstance().doInsert(emp))
294             {
295 
296                 if (smart.getFiles().getSize() > 0)
297                 {
298                     smart.getFiles().getFile(0).saveAs(pathName);
299                 }
300                 request.setAttribute("cp", cp);
301                 request.setAttribute("ls", ls);
302                 request.setAttribute("msg",
303                         MessageUtil.getMessage("emp.add.true"));
304                 path = "Emp_operation_do.jsp";
305             }
306             else
307             {
308                 request.setAttribute("msg",
309                         MessageUtil.getMessage("emp.add.false"));
310             }
311         }
312         catch (Exception e)
313         {
314             e.printStackTrace();
315         }
316 
317         request.getRequestDispatcher(path).forward(request, response);
318     }
319 
320     public void update(HttpServletRequest request, HttpServletResponse response)
321             throws ServletException, IOException
322     {
323         String path = "error.jsp";
324         int cp = Integer.parseInt(smart.getRequest().getParameter("cp"));
325         int ls = Integer.parseInt(smart.getRequest().getParameter("ls"));
326         int empno = 0;
327         try
328         {
329             empno = Integer.parseInt(smart.getRequest().getParameter("empno"));
330         }
331         catch (Exception ex)
332         {
333 
334         }
335         String ename = smart.getRequest().getParameter("ename");
336         String job = smart.getRequest().getParameter("job");
337         int mgr = Integer.parseInt(smart.getRequest().getParameter("mgr"));
338         java.util.Date hiredate = null;
339         try
340         {
341             hiredate = new SimpleDateFormat("yyyy-MM-dd").parse(smart
342                     .getRequest().getParameter("hiredate"));
343         }
344         catch (Exception ex)
345         {
346 
347         }
348         float sal = Float.parseFloat(smart.getRequest().getParameter("sal"));
349         float comm = Float.parseFloat(smart.getRequest().getParameter("comm"));
350         int deptno = Integer
351                 .parseInt(smart.getRequest().getParameter("deptno"));
352         String note = smart.getRequest().getParameter("note");
353         Emp emp = new Emp();
354         emp.setEmpno(empno);
355         emp.setEname(ename);
356         emp.setJob(job);
357         Emp e = new Emp();
358         e.setEmpno(mgr);
359         emp.setEmpmgr(e);
360         emp.setHiredate(hiredate);
361         emp.setSal(sal);
362         emp.setComm(comm);
363         Dept dept = new Dept();
364         dept.setDeptno(deptno);
365         emp.setDept(dept);
366         emp.setNote(note);
367         String extName = null;
368         String fileName = null;
369         String pathName = null;
370         String oldPhoto = smart.getRequest().getParameter("oldPhoto");
371         if (smart.getFiles().getSize() > 0)
372         {
373             if ("nophoto.jpg".equals(oldPhoto))
374             {
375                 RandName rn = new RandName(request.getRemoteAddr());
376                 extName = "." + smart.getFiles().getFile(0).getFileExt();// 得到上传文件的扩展名
377                 fileName = rn.getRandName();// 生成文件名
378                 fileName += extName;
379                 pathName = this.getServletContext().getRealPath("/")
380                         + "emp_operation" + java.io.File.separator + "upload"
381                         + java.io.File.separator + fileName;
382                 emp.setPhoto(fileName);
383             }
384             else
385             {
386                 pathName = this.getServletContext().getRealPath("/")
387                         + "emp_operation" + java.io.File.separator + "upload"
388                         + java.io.File.separator + oldPhoto;
389                 emp.setPhoto(oldPhoto);
390             }
391 
392         }
393         else
394         {
395             emp.setPhoto(oldPhoto);
396         }
397         try
398         {
399             if (DaoFactory.getEmpDaoInstance().doUpdate(emp))
400             {
401                 if (smart.getFiles().getSize() > 0)
402                 {
403                     smart.getFiles().getFile(0).saveAs(pathName);
404                 }
405                 path = "Emp_operation_do.jsp";
406                 request.setAttribute("msg",
407                         MessageUtil.getMessage("emp.update.true"));
408                 request.setAttribute("cp", cp);
409                 request.setAttribute("ls", ls);
410             }
411             else
412             {
413                 request.setAttribute("msg",
414                         MessageUtil.getMessage("emp.update.false"));
415             }
416         }
417         catch (Exception e1)
418         {
419             e1.printStackTrace();
420         }
421         request.getRequestDispatcher(path).forward(request, response);
422     }
423 
424     public void deleteEmp(HttpServletRequest request,
425             HttpServletResponse response) throws ServletException, IOException
426     {
427         response.setContentType("text/html;charset=GBK");
428         PrintWriter out = response.getWriter();
429         int empno = 0;
430         String pic = request.getParameter("photo");
431         try
432         {
433             empno = Integer.parseInt(request.getParameter("empno"));
434         }
435         catch (Exception ex)
436         {
437 
438         }
439         try
440         {
441             boolean flag = DaoFactory.getEmpDaoInstance().doDelete(empno);
442             if (flag)
443             {
444                 if (!"nophoto.jpg".equals(pic))
445                 {
446                     String pahtName = this.getServletContext().getRealPath("/")
447                             + "emp_operation" + java.io.File.separator
448                             + "upload" + java.io.File.separator + pic;
449                     java.io.File file = new java.io.File(pahtName);
450                     if (file.exists())
451                     {
452                         file.delete();
453                     }
454                 }
455             }
456             out.print(flag);
457         }
458         catch (Exception e)
459         {
460 
461             e.printStackTrace();
462         }
463         finally
464         {
465             out.close();
466         }
467 
468     }
469 
470     public void delete(HttpServletRequest request, HttpServletResponse response)
471             throws ServletException, IOException
472     {
473         String path = "error.jsp";
474         int empno = 0;
475         int cp = Integer.parseInt(request.getParameter("cp"));
476         int ls = Integer.parseInt(request.getParameter("ls"));
477         try
478         {
479             empno = Integer.parseInt(request.getParameter("empno"));
480         }
481         catch (Exception ex)
482         {
483 
484         }
485         String pic = request.getParameter("photo");
486         try
487         {
488             if (DaoFactory.getEmpDaoInstance().doDelete(empno))
489             {
490                 if (!"nophoto.jpg".equals(pic))
491                 {
492                     String pahtName = this.getServletContext().getRealPath("/")
493                             + "emp_operation" + java.io.File.separator
494                             + "upload" + java.io.File.separator + pic;
495                     java.io.File file = new java.io.File(pahtName);
496                     if (file.exists())
497                     {
498                         file.delete();
499                     }
500                 }
501                 request.setAttribute("msg",
502                         MessageUtil.getMessage("emp.delete.true"));
503                 request.setAttribute("cp", cp);
504                 request.setAttribute("ls", ls);
505                 path = "Emp_operation_do.jsp";
506 
507             }
508             else
509             {
510                 request.setAttribute("msg",
511                         MessageUtil.getMessage("emp.delete.false"));
512             }
513         }
514         catch (Exception e)
515         {
516             e.printStackTrace();
517         }
518 
519         request.getRequestDispatcher(path).forward(request, response);
520     }
521 
522     public void deptinfo(HttpServletRequest request,
523             HttpServletResponse response) throws ServletException, IOException
524     {
525         String path = "error.jsp";
526         int currentPage = 1;
527         int lineSize = 3;
528         String keyword = null;
529         long allRecorders = 0;
530 
531         int deptno = 0;
532         try
533         {
534             deptno = Integer.parseInt(request.getParameter("deptno"));
535             currentPage = Integer.parseInt(request.getParameter("cp"));
536             lineSize = Integer.parseInt(request.getParameter("ls"));
537             keyword = request.getParameter("kw");
538         }
539         catch (Exception ex)
540         {
541 
542         }
543         if (keyword == null)
544         {
545             keyword = "";
546         }
547         try
548         {
549             Dept dept = DaoFactory.getDeptDaoInstance().findById(deptno,
550                     keyword, currentPage, lineSize);
551             List<Emp> allEmp = dept.getAllEmp();
552             if (null != dept)
553             {
554 
555                 request.setAttribute("dept", dept);
556                 request.setAttribute("emp", allEmp);
557                 allRecorders = (Long) dept.getStats().get("allcount");
558                 request.setAttribute("allRecorders", allRecorders);
559                 request.setAttribute("currentPage", currentPage);
560                 request.setAttribute("lineSize", lineSize);
561                 request.setAttribute("allRecorders", allRecorders);
562 
563                 path = "emp_dept_info.jsp";
564             }
565         }
566         catch (Exception e)
567         {
568             e.printStackTrace();
569         }
570         request.getRequestDispatcher(path).forward(request, response);
571     }
572 
573     public void empinfo(HttpServletRequest request, HttpServletResponse response)
574             throws ServletException, IOException
575     {
576         String path = "error.jsp";
577         int empno = Integer.parseInt(request.getParameter("empno"));
578         try
579         {
580             Emp mgEmp = DaoFactory.getEmpDaoInstance().findById(empno);
581             if (mgEmp != null)
582             {
583                 request.setAttribute("emp", mgEmp);
584                 path = "mgr_info.jsp";
585             }
586 
587         }
588         catch (Exception e)
589         {
590             e.printStackTrace();
591         }
592 
593         request.getRequestDispatcher(path).forward(request, response);
594     }
595 
596 }

　　雇员增加表单

View Code

 1 <h1>添加雇员信息</h1>
 2 <form action="EmpServlet" method="post" onSubmit="return validate(this.value)" enctype="multipart/form-data">
 3             <table border="1" ,width="100%">    
 4                 <tr>
 5                     <td>雇员编号:</td>
 6                     <td><input type="text" name="empno" onBlur="validateEmpno(this.value)" /></td>
 7                     <td><span id="empno_picMsg"><font color="red">*</font></span></td>
 8                     <td rowspan="9">
 9                         <div id="imgPreview" style="filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale);280px;height:200px;"></div>
10                     </td>
11                 </tr>
12                 <tr>
13                     <td>雇员姓名:</td>
14                     <td><input type="text" name="ename" onBlur="validateEname(this.value)"/></td>
15                     <td><span id="ename_picMsg"><font color="red">*</font></span></td>
16                 </tr>
17                 <tr>
18                     <td>雇员岗位:</td>
19                     <td><input type="text" name="job" onBlur="validateJob(this.value)"/></td>
20                     <td><span id="job_picMsg"><font color="red">*</font></span></td>
21                 </tr>
22                 <tr>
23                     <td>部门领导:</td>
24                     <td>
25                         <select name="mgr" onclick="findAllMgr()">
26                             <option value="0">没有领导</option>                    
27                         </select>
28                     </td>                    
29                 </tr>
30                 <tr>
31                     <td>雇佣日期:</td>
32                     <td><input type="text" name="hiredate" onBlur="validateHiredate(this.value)"/></td>
33                     <td><span id="hiredate_picMsg"><font color="red">*</font></span></td>
34                 </tr>
35                 <tr>
36                     <td>雇员工资:</td>
37                     <td><input type="text" name="sal" onBlur="validateSal(this.value)"/></td>
38                     <td><span id="sal_picMsg"><font color="red">*</font></span></td>
39                 </tr>
40                 <tr>
41                     <td>雇员奖金:</td>
42                     <td><input type="text" name="comm" onBlur="validateComm(this.value)"/></td>
43                     <td><span id="comm_picMsg"><font color="red">*</font></span></td>
44                 </tr>
45                 <tr>
46                     <td>部门:</td>
47                     <td>
48                         <select name="deptno" onclick="findAllDept()">
49                             <option value="0">没有部门</option>                        
50                         </select>
51                     </td>                    
52                 </tr>
53                 <tr>
54                     <td>雇员照片:</td>
55                     <td><input type="file" name="photo" onChange="Preview(this)"/></td>                    
56                 </tr>
57                 <tr>
58                     <td>雇员简介:</td>
59                     <td colspan="3">
60                         <div class="editor">
61                             <textarea id="note" name="note" style="650px;height:200px;visibility:hidden;">
62                             雇员简介
63                             </textarea>
64                         </div>
65                     </td>                    
66                 </tr>
67                 <tr>
68                     <input type="hidden" name="cp" value="<%=request.getParameter("cp")%>"/>
69                     <input type="hidden" name="ls" value="<%=request.getParameter("ls")%>"/>
70                     <input type="hidden" name="status" value="add"/>
71                     <td>&nbsp;&nbsp;&nbsp;&nbsp;<input type="submit" value="添加"/>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<input type="reset" value="重置"/></td>
72                 </tr>
73             </table>
74 </form>

3，通过AJAX生成级联菜单

View Code

  1 <script language="javascript">
  2     var xmlHttp;
  3     function createXMLHttp()
  4     {
  5         if(window.XMLHttpRequest)
  6         {
  7             xmlHttp=new XMLHttpRequest();
  8         }
  9         else
 10         {
 11             xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
 12         }
 13     }
 14     function findSubTypes(tid)
 15     {
 16         createXMLHttp();
 17         xmlHttp.open("POST","ProductServlet?status=findbytypes&tid="+tid);
 18         xmlHttp.onreadystatechange=findSubTypesCallBack;
 19         xmlHttp.send(null);
 20         
 21     }
 22     function findSubTypesCallBack()
 23     {
 24         if(xmlHttp.readyState==4&&xmlHttp.status==200)
 25         {
 26             var allSubTypes=xmlHttp.responseXML.getElementsByTagName("subtypes")[0].childNodes;
 27             var select=document.getElementById("subtypes");
 28             select.length=1;
 29             select.options[0].selected=true;
 30             for(var i=0;i<allSubTypes.length;i++)
 31             {
 32                 var subtype=allSubTypes[i];
 33                 var option=document.createElement("option");    
 34                 var stid=subtype.getElementsByTagName("stid")[0].firstChild.nodeValue;
 35                 var title=subtype.getElementsByTagName("title")[0].firstChild.nodeValue;                                                                  
 36                 option.setAttribute("value",stid);
 37                 option.appendChild(document.createTextNode(title));
 38                 select.appendChild(option);                
 39             }            
 40         }
 41     }
 42     function Preview(imgFile) 
 43     { 
 44             document.getElementById("imgPreview").filters. item("DXImageTransform.Microsoft.AlphaImageLoader").src = imgFile.value;
 45     } 
 46     function validatePid(pid)
 47     {
 48         if(!(/^\d{1,5}$/.test(pid)))
 49         {
 50             document.getElementById("pid_picMsg").innerHTML="<img src=\"<%=request.getContextPath()%>/images/wrong.gif\">"+"<font color=\"red\">商品编号至少是一位数字！</font>"
 51             return false;                                                                                                        
 52         }
 53         else
 54         {
 55             document.getElementById("pid_picMsg").innerHTML="<img src=\"<%=request.getContextPath()%>/images/right.gif\">"+"<font color=\"green\">商品编号输入正确！</font>"
 56             return true;
 57         }
 58     }
 59     function validateName(name)
 60     {
 61         if(name=="")
 62         {
 63             document.getElementById("name_picMsg").innerHTML="<img src=\"<%=request.getContextPath()%>/images/wrong.gif\">"+"<font color=\"red\">商品名称不能为空！</font>"
 64             return false;                                                                                                        
 65         }
 66         else
 67         {
 68             document.getElementById("name_picMsg").innerHTML="<img src=\"<%=request.getContextPath()%>/images/right.gif\">"+"<font color=\"green\">商品名称输入正确！</font>"
 69             return true;
 70         }
 71     }
 72     function validatePrice(price)
 73     {
 74         if(!(/^\d+.\d*$/.test(price)))
 75         {
 76             document.getElementById("price_picMsg").innerHTML="<img src=\"<%=request.getContextPath()%>/images/wrong.gif\">"+"<font color=\"red\">商品价格必须是数字,可以包含小数！</font>"
 77             return false;                                                                                                        
 78         }
 79         else
 80         {
 81             document.getElementById("price_picMsg").innerHTML="<img src=\"<%=request.getContextPath()%>/images/right.gif\">"+"<font color=\"green\">商品价格输入正确！</font>"
 82             return true;
 83         }
 84     }
 85     function validateAmount(amount)
 86     {
 87         if(!(/^\d{1,}$/.test(amount)))        
 88         {
 89             document.getElementById("amount_picMsg").innerHTML="<img src=\"<%=request.getContextPath()%>/images/wrong.gif\">"+"<font color=\"red\">库存数量必须是一位或多位整数！</font>"
 90             return false;                                                                                                        
 91         }
 92         else
 93         {
 94             document.getElementById("amount_picMsg").innerHTML="<img src=\"<%=request.getContextPath()%>/images/right.gif\">"+"<font color=\"green\">库存数量输入正确！</font>"
 95             return true;
 96         }
 97     }
 98     function validateTypes(types)
 99     {
100         if(types=="0")
101         {
102             document.getElementById("types_picMsg").innerHTML="<img src=\"<%=request.getContextPath()%>/images/wrong.gif\">"+"<font color=\"red\">请选择商品类别！</font>"
103             return false;                                                                                                        
104         }
105         else
106         {
107             document.getElementById("types_picMsg").innerHTML="<img src=\"<%=request.getContextPath()%>/images/right.gif\">"+"<font color=\"green\">商品类别输入正确！</font>"
108             return true;
109         }
110     }
111     function validateSubTypes(subtypes)
112     {
113         if(subtypes=="0")
114         {
115             document.getElementById("subtypes_picMsg").innerHTML="<img src=\"<%=request.getContextPath()%>/images/wrong.gif\">"+"<font color=\"red\">请选择商品子类别！</font>"
116             return false;                                                                                                        
117         }
118         else
119         {
120             document.getElementById("subtypes_picMsg").innerHTML="<img src=\"<%=request.getContextPath()%>/images/right.gif\">"+"<font color=\"green\">商品子类别输入正确！</font>"
121             return true;
122         }
123     }
124     function validate(numValue)
125     {
126         return validatePid(numValue.pid.value)&&
127                      validateName(numValue.name.value)&&
128                      validatePrice(numValue.price.value)&&                     
129                      validateAmount(numValue.amount.value)&&
130                      validateTypes(numValue.types.value)&&
131                      validateSubTypes(numValue.subtypes.value);
132     }
133 </script>

　　ProductServlet处理请求

View Code

  1 package org.xiong.demo.servlet;
  2 
  3 import java.io.ByteArrayOutputStream;
  4 import java.io.IOException;
  5 import java.io.PrintWriter;
  6 import java.util.Iterator;
  7 import java.util.List;
  8 import java.util.Map;
  9 
 10 import javax.servlet.ServletException;
 11 import javax.servlet.http.HttpServlet;
 12 import javax.servlet.http.HttpServletRequest;
 13 import javax.servlet.http.HttpServletResponse;
 14 
 15 import org.jdom.Document;
 16 import org.jdom.Element;
 17 import org.jdom.output.XMLOutputter;
 18 import org.lxh.smart.SmartUpload;
 19 import org.lxh.smart.SmartUploadException;
 20 import org.xiong.demo.dao.IProductDao;
 21 import org.xiong.demo.factory.DaoFactory;
 22 import org.xiong.demo.util.MessageUtil;
 23 import org.xiong.demo.util.RandName;
 24 import org.xiong.demo.vo.Product;
 25 import org.xiong.demo.vo.SubTypes;
 26 import org.xiong.demo.vo.Types;
 27 
 28 public class ProductServlet extends HttpServlet
 29 {
 30 
 31     private SmartUpload smart;
 32 
 33     public void doGet(HttpServletRequest request, HttpServletResponse response)
 34             throws ServletException, IOException
 35     {
 36 
 37         this.doPost(request, response);
 38     }
 39 
 40     public void doPost(HttpServletRequest request, HttpServletResponse response)
 41             throws ServletException, IOException
 42     {
 43         String path = "error.jsp";
 44         String status = request.getParameter("status");
 45         if ("".equals(status) || null == status)
 46         {
 47             this.smart = new SmartUpload();
 48             this.smart.initialize(super.getServletConfig(), request, response);
 49             try
 50             {
 51                 this.smart.upload();
 52                 status = this.smart.getRequest().getParameter("status");
 53             }
 54             catch (SmartUploadException e)
 55             {
 56                 e.printStackTrace();
 57             }
 58 
 59         }
 60         if (!("".equals(status) || null == status))
 61         {
 62             if ("list".equals(status))
 63             {
 64                 this.list(request, response);
 65             }
 66             if ("add".equals(status))
 67             {
 68                 this.add(request, response);
 69             }
 70             if ("addpre".equals(status))
 71             {
 72                 this.addpre(request, response);
 73             }
 74             if ("updatepre".equals(status))
 75             {
 76                 this.updatepre(request, response);
 77             }
 78             if ("update".equals(status))
 79             {
 80                 this.update(request, response);
 81             }
 82             if ("delete".equals(status))
 83             {
 84                 this.delete(request, response);
 85             }
 86             if ("deleteProduct".equals(status))
 87             {
 88                 this.deleteProduct(request, response);
 89             }
 90             if ("productinfo".equals(status))
 91             {
 92                 this.productinfo(request, response);
 93             }
 94             if ("findbytypes".equals(status))
 95             {
 96                 this.findbytypes(request, response);
 97             }
 98 
 99         }
100         else
101         {
102             request.getRequestDispatcher(path).forward(request, response);
103         }
104     }
105 
106     public void findbytypes(HttpServletRequest request,
107             HttpServletResponse response) throws ServletException, IOException
108     {
109         response.setContentType("text/xml;charset=GBK");
110         PrintWriter out = response.getWriter();
111         ByteArrayOutputStream bos = new ByteArrayOutputStream();
112         int tid = Integer.parseInt(request.getParameter("tid"));
113         try
114         {
115             List<SubTypes> all = DaoFactory.getSubTypesDaoInstance()
116                     .findBySubTypes(tid);
117             Iterator<SubTypes> iter = all.iterator();
118             Element root = new Element("subtypes");
119             Document doc = new Document(root);
120             while (iter.hasNext())
121             {
122                 SubTypes sub = iter.next();
123                 Element subtype = new Element("subtype");
124                 Element stid = new Element("stid");
125                 Element id = new Element("id");
126                 Element title = new Element("title");
127                 Element note = new Element("note");
128                 stid.setText(sub.getStid() + "");
129                 id.setText(sub.getTid() + "");
130                 title.setText(sub.getTitle());
131                 note.setText(sub.getNote());
132                 subtype.addContent(stid);
133                 subtype.addContent(id);
134                 subtype.addContent(title);
135                 subtype.addContent(note);
136                 root.addContent(subtype);
137             }
138             XMLOutputter xmlout = new XMLOutputter();
139             xmlout.setFormat(xmlout.getFormat().setEncoding("GBK"));
140             xmlout.output(doc, bos);
141             out.print(bos);
142         }
143         catch (Exception ex)
144         {
145             ex.printStackTrace();
146         }
147         finally
148         {
149             bos.close();
150             out.close();
151         }
152     }
153 
154     public void list(HttpServletRequest request, HttpServletResponse response)
155             throws ServletException, IOException
156     {
157         String path = "error.jsp";
158         int currentPage = 1;
159         int lineSize = 12;
160         long allRecorders = 0;
161         String keyword = null;
162         try
163         {
164             currentPage = Integer.parseInt(request.getParameter("cp"));
165             lineSize = Integer.parseInt(request.getParameter("ls"));
166             keyword = request.getParameter("kw");
167         }
168         catch (Exception ex)
169         {
170         }
171         if (keyword == null)
172         {
173             keyword = "";
174         }
175         IProductDao dao = DaoFactory.getProductDaoInstance();
176         try
177         {
178             java.util.List<Product> allList = dao.findAll(keyword, currentPage,
179                     lineSize);
180             allRecorders = dao.getAllCount(keyword);
181             request.setAttribute("allList", allList);
182             request.setAttribute("allRecorders", allRecorders);
183             request.setAttribute("currentPage", currentPage);
184             request.setAttribute("lineSize", lineSize);
185             path = "product_page_source_back.jsp";
186         }
187         catch (Exception e)
188         {
189             e.printStackTrace();
190         }
191         request.getRequestDispatcher(path).forward(request, response);
192     }
193 
194     public void addpre(HttpServletRequest request, HttpServletResponse response)
195             throws ServletException, IOException
196     {
197         String page = "error.jsp";
198         int cp = Integer.parseInt(request.getParameter("cp"));
199         int ls = Integer.parseInt(request.getParameter("ls"));
200         try
201         {
202             request.setAttribute("allTypes", DaoFactory.getTypesDaoInstance()
203                     .findAll(""));
204             request.setAttribute("cp", cp);
205             request.setAttribute("ls", ls);
206             page = "product_add.jsp";
207         }
208         catch (Exception ex)
209         {
210             ex.printStackTrace();
211         }
212         request.getRequestDispatcher(page).forward(request, response);
213     }
214 
215     public void add(HttpServletRequest request, HttpServletResponse response)
216             throws ServletException, IOException
217     {
218         String page = "error.jsp";
219         int cp = Integer.parseInt(smart.getRequest().getParameter("cp"));
220         int ls = Integer.parseInt(smart.getRequest().getParameter("ls"));
221         int pid = Integer.parseInt(smart.getRequest().getParameter("pid"));
222         String name = smart.getRequest().getParameter("name");
223         float price = Float
224                 .parseFloat(smart.getRequest().getParameter("price"));
225         int amount = Integer
226                 .parseInt(smart.getRequest().getParameter("amount"));
227         String photo = smart.getRequest().getParameter("photo");
228         String note = smart.getRequest().getParameter("note");
229         int tid = Integer.parseInt(smart.getRequest().getParameter("types"));
230         int stid = Integer
231                 .parseInt(smart.getRequest().getParameter("subtypes"));
232 
233         Product pr = new Product();
234         pr.setPid(pid);
235         pr.setName(name);
236         pr.setAmount(amount);
237         pr.setPrice(price);
238         pr.setPhoto(photo);
239         pr.setNote(note);
240         Types types = new Types();
241         types.setTid(tid);
242         pr.setTypes(types);
243         SubTypes subtypes = new SubTypes();
244         subtypes.setStid(stid);
245         pr.setSubtypes(subtypes);
246         System.out.println(pr.getTypes());
247         System.out.println(pr.getSubtypes());
248         String extName = null;
249         String fileName = null;
250         String pathName = null;
251         if (smart.getFiles().getSize() > 0)
252         {
253             RandName rn = new RandName(request.getRemoteAddr());
254             extName = "." + smart.getFiles().getFile(0).getFileExt();// 得到上传文件的扩展名
255             fileName = rn.getRandName();// 生成文件名
256             fileName += extName;
257             pathName = this.getServletContext().getRealPath("/") + "product"
258                     + java.io.File.separator + "upload"
259                     + java.io.File.separator + fileName;
260             pr.setPhoto(fileName);
261         }
262         else
263         {
264             pr.setPhoto("nophoto.jpg");
265         }
266         try
267         {
268 
269             if (DaoFactory.getProductDaoInstance().doInsert(pr))
270             {
271                 if (smart.getFiles().getSize() > 0)
272                 {
273                     smart.getFiles().getFile(0).saveAs(pathName);
274                 }
275                 request.setAttribute("msg",
276                         MessageUtil.getMessage("product.add.true"));
277                 request.setAttribute("cp", cp);
278                 request.setAttribute("ls", ls);
279                 page = "product_operation.jsp";
280             }
281             else
282             {
283                 request.setAttribute("msg",
284                         MessageUtil.getMessage("product.add.true"));
285             }
286         }
287         catch (Exception e)
288         {
289             e.printStackTrace();
290         }
291         request.getRequestDispatcher(page).forward(request, response);
292     }
293 
294     public void updatepre(HttpServletRequest request,
295             HttpServletResponse response) throws ServletException, IOException
296     {
297         String path = "error.jsp";
298         int pid = Integer.parseInt(request.getParameter("pid"));
299         int cp = Integer.parseInt(request.getParameter("cp"));
300         int ls = Integer.parseInt(request.getParameter("ls"));
301         try
302         {
303             Map<String, Object> mp = DaoFactory.getDaoServiceInstance()
304                     .findProductAllTypes(pid);
305             if (mp != null)
306             {
307                 request.setAttribute("pro", mp.get("pro"));
308                 request.setAttribute("alltypes", mp.get("alltypes"));
309                 request.setAttribute("subtypes", mp.get("subtypes"));
310                 path = "product_update.jsp";
311             }
312         }
313         catch (Exception e)
314         {
315 
316             e.printStackTrace();
317         }
318         request.getRequestDispatcher(path).forward(request, response);
319     }
320 
321     public void update(HttpServletRequest request, HttpServletResponse response)
322             throws ServletException, IOException
323     {
324         String page = "error.jsp";
325         int cp = Integer.parseInt(smart.getRequest().getParameter("cp"));
326         int ls = Integer.parseInt(smart.getRequest().getParameter("ls"));
327         int pid = Integer.parseInt(smart.getRequest().getParameter("pid"));
328         String name = smart.getRequest().getParameter("name");
329         float price = Float
330                 .parseFloat(smart.getRequest().getParameter("price"));
331         int amount = Integer
332                 .parseInt(smart.getRequest().getParameter("amount"));
333         String photo = smart.getRequest().getParameter("photo");
334         String note = smart.getRequest().getParameter("note");
335         int tid = Integer.parseInt(smart.getRequest().getParameter("types"));
336         int stid = Integer
337                 .parseInt(smart.getRequest().getParameter("subtypes"));
338 
339         Product pr = new Product();
340         pr.setPid(pid);
341         pr.setName(name);
342         pr.setAmount(amount);
343         pr.setPrice(price);
344         pr.setPhoto(photo);
345         pr.setNote(note);
346         Types types = new Types();
347         types.setTid(tid);
348         pr.setTypes(types);
349         SubTypes subtypes = new SubTypes();
350         subtypes.setStid(stid);
351         pr.setSubtypes(subtypes);
352 
353         String extName = null;
354         String fileName = null;
355         String path = null;
356         String oldPhoto = smart.getRequest().getParameter("oldPhoto");
357         if (smart.getFiles().getSize() > 0)
358         {
359             if ("nophoto.jpg".equals(oldPhoto))
360             {
361                 RandName rn = new RandName(request.getRemoteAddr());
362                 extName = "." + smart.getFiles().getFile(0).getFileExt();// 得到上传文件的扩展名
363                 fileName = rn.getRandName();// 生成文件名
364                 fileName += extName;
365                 path = this.getServletContext().getRealPath("/") + "product"
366                         + java.io.File.separator + "upload"
367                         + java.io.File.separator + fileName;
368                 pr.setPhoto(fileName);
369             }
370             else
371             {
372                 path = this.getServletContext().getRealPath("/") + "product"
373                         + java.io.File.separator + "upload"
374                         + java.io.File.separator + oldPhoto;
375                 pr.setPhoto(oldPhoto);
376             }
377         }
378         else
379         {
380             pr.setPhoto("nophoto.jpg");
381         }
382 
383         try
384         {
385             if (DaoFactory.getProductDaoInstance().doUpdate(pr))
386             {
387                 if (smart.getFiles().getSize() > 0)
388                 {
389                     smart.getFiles().getFile(0).saveAs(path);
390                 }
391                 request.setAttribute("msg",
392                         MessageUtil.getMessage("product.update.true"));
393                 request.setAttribute("cp", cp);
394                 request.setAttribute("ls", ls);
395                 page = "product_operation.jsp";
396             }
397             else
398             {
399                 request.setAttribute("msg",
400                         MessageUtil.getMessage("product.update.false"));
401             }
402         }
403         catch (Exception e)
404         {
405             e.printStackTrace();
406         }
407         request.getRequestDispatcher(page).forward(request, response);
408     }
409 
410     public void deleteProduct(HttpServletRequest request,
411             HttpServletResponse response) throws ServletException, IOException
412     {
413 
414         response.setContentType("text/html;charset=GBK");
415         PrintWriter out = response.getWriter();
416         int pid = 0;
417         try
418         {
419             pid = Integer.parseInt(request.getParameter("pid"));
420 
421         }
422         catch (Exception ex)
423         {
424 
425         }
426         String pic = request.getParameter("photo");
427         try
428         {
429             boolean flag = DaoFactory.getProductDaoInstance().doDelete(pid);
430             if (!"nophoto.jpg".equals(pic))
431             {
432                 String pahtName = this.getServletContext().getRealPath("/")
433                         + "product" + java.io.File.separator + "upload"
434                         + java.io.File.separator + pic;
435                 java.io.File file = new java.io.File(pahtName);
436                 if (file.exists())
437                 {
438                     file.delete();
439                 }
440             }
441             out.print(flag);
442         }
443         catch (Exception ex)
444         {
445             ex.printStackTrace();
446         }
447         finally
448         {
449             out.close();
450         }
451 
452     }
453 
454     public void delete(HttpServletRequest request, HttpServletResponse response)
455             throws ServletException, IOException
456     {
457         String page = "error.jsp";
458         int cp = Integer.parseInt(request.getParameter("cp"));
459         int ls = Integer.parseInt(request.getParameter("ls"));
460         int pid = 0;
461         try
462         {
463             pid = Integer.parseInt(request.getParameter("pid"));
464         }
465         catch (Exception ex)
466         {
467 
468         }
469         String pic = request.getParameter("photo");
470         try
471         {
472             if (DaoFactory.getProductDaoInstance().doDelete(pid))
473             {
474                 if (!"nophoto.jpg".equals(pic))
475                 {
476                     String pahtName = this.getServletContext().getRealPath("/")
477                             + "product" + java.io.File.separator + "upload"
478                             + java.io.File.separator + pic;
479                     java.io.File file = new java.io.File(pahtName);
480                     if (file.exists())
481                     {
482                         file.delete();
483                     }
484                 }
485                 request.setAttribute("cp", cp);
486                 request.setAttribute("ls", ls);
487                 page = "product_operation.jsp";
488                 request.setAttribute("msg",
489                         MessageUtil.getMessage("product.delete.true"));
490             }
491             else
492             {
493                 request.setAttribute("msg",
494                         MessageUtil.getMessage("product.delete.false"));
495             }
496         }
497         catch (Exception e)
498         {
499             e.printStackTrace();
500         }
501         request.getRequestDispatcher(page).forward(request, response);
502     }
503 
504     public void productinfo(HttpServletRequest request,
505             HttpServletResponse response) throws ServletException, IOException
506     {
507         String path = "error.jsp";
508         int pid = 0;
509         try
510         {
511             pid = Integer.parseInt(request.getParameter("pid"));
512         }
513         catch (Exception ex)
514         {
515         }
516         try
517         {
518             Product pr = DaoFactory.getDaoServiceInstance().findProductInfo(
519                     pid, request.getSession().getAttribute(pid + "") == null);
520             if (pr != null)
521             {
522                 request.setAttribute("pr", pr);
523                 path = "product_info.jsp";
524             }
525         }
526         catch (Exception e)
527         {
528             e.printStackTrace();
529         }
530         request.getRequestDispatcher(path).forward(request, response);
531     }
532 
533 }

　　商品信息修改表单

View Code

 1 <h1><em>修改商品信息</em></h1>
 2 <form action="ProductServlet" method="post" onSubmit="return validate(this.value)" enctype="multipart/form-data">
 3     <c:if test="${pro!=null}" var="res" scope="page">            
 4         <table border="1" ,width="100%">                        
 5                 <tr>
 6                     <td>商品编号:</td>
 7                     <td><input type="text" name="pid" value="${pro.pid}" onBlur="validatePid(this.value)" /></td>
 8                     <td><span id="pid_picMsg"><font color="red">*</font></span></td>
 9                     <td rowspan="3"><img src="${pageContext.request.contextPath}/product/upload/${pro.photo}"></td>
10                         
11                     
12                 </tr>
13                 <tr>
14                     <td>商品名称:</td>
15                     <td><input type="text" name="name" value="${pro.name}" onBlur="validateName(this.value)"/></td>
16                     <td><span id="name_picMsg"><font color="red">*</font></span></td>
17                     
18                 </tr>                
19                 <tr>
20                     <td>商品价格:</td>
21                     <td><input type="text" name="price" value="${pro.price}" onBlur="validatePrice(this.value)"/></td>
22                     <td><span id="price_picMsg"><font color="red">*</font></span></td>                    
23                 </tr>                
24                 <tr>
25                     <td>商品库存:</td>
26                     <td><input type="text" name="amount" value="${pro.amount}" onBlur="validateAmount(this.value)"/></td>
27                     <td><span id="amount_picMsg"><font color="red">*</font></span></td>
28                     <td rowspan="3">
29                         <div id="imgPreview" style="filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale);128px;height:128px;"></div>
30                     </td>
31                     
32                 </tr>
33                 <tr>
34                     <td>商品类别:</td>                     
35                     <c:if test="${alltypes!=null}" var="tes" scope="page">                        
36                         <td>                        
37                             <select name="types" onBlur="validateTypes(this.value);findSubTypes(this.value)">
38                                 <option value="0">请选择商品类别</option>
39                                 <c:forEach items="${alltypes}" var="type">
40                                     <option value="${type.tid}" ${pro.types.tid==type.tid?"SELECTED":""}>${type.title}</option>                                                                
41                                 </c:forEach>
42                              </select>
43                         </td>
44                     </c:if>
45                     <td><span id="types_picMsg"><font color="red">*</font> </span></td>
46                 </tr>
47                 <tr>
48                     <td>商品子类别:</td>
49                     <c:if test="${subtypes!=null}" var="tes" scope="page">
50                         <td>
51                             <select name="subtypes"    onBlur="validateSubTypes(this.value)">
52                                 <option value="0">请选择商品子类别</option>
53                                 <c:forEach items="${subtypes}" var="type">
54                                     <option value="${type.stid}" ${pro.subtypes.stid==type.stid?"SELECTED":""}>${type.title}</option>                                                                
55                                 </c:forEach>
56                             </select>
57                         </td>
58                     </c:if>        
59                     <td><span id="subtypes_picMsg"><font color="red">*</font>
60                     </span></td>
61                 </tr>
62                 <tr>
63                     <td>修改照片:</td>
64                     <td><input type="file" name="photo" onChange="Preview(this)"/></td>                        
65                 </tr>
66                 <tr>
67                     <td>商品简介:</td>
68                     <td colspan="3">
69                         <div class="editor">
70                             <textarea id="note" name="note" style="650px;height:200px;visibility:hidden;">
71                              ${pro.note}
72                             </textarea>
73                         </div>
74                     </td>                    
75                 </tr>
76                 <tr>
77                     <input type="hidden" name="oldPhoto" value="${pro.photo}" />
78                     <input type="hidden" name="cp" value="<%=request.getParameter("cp")%>"/>
79                     <input type="hidden" name="ls" value="<%=request.getParameter("ls")%>"/>
80                     <input type="hidden" name="status" value="update"/>
81                     <td>&nbsp;&nbsp;&nbsp;&nbsp;<input type="submit" value="修改"/>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<input type="reset" value="重置"/></td>
82                 </tr>
83             </table>
84         </c:if>
85 </form>

4，通过AJAX删除商品信息

View Code

 1 <script language="javascript">
 2     var xmlHttp;
 3     var temp;
 4     function createXMLHttp()
 5     {
 6         if(window.XMLHttpRequest)
 7         {
 8             xmlHttp=new XMLHttpRequest();
 9         }    
10         else
11         {
12             xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
13         }
14     }
15     function deleteProduct(pid,photo)
16     {    
17         if(window.confirm("确定删除此商品吗？"))
18         {            
19             deleteProductAJAX(pid,photo);
20         }
21         else
22         {
23             return false;
24         }
25     }
26     function deleteProductAJAX(pid,photo)
27     {
28         createXMLHttp();        
29         temp=pid;
30         xmlHttp.open("POST", "ProductServlet?status=deleteProduct&pid="+pid+"&photo="+photo);
31         xmlHttp.onreadystatechange=deleteProductAJAXCallBack;
32         xmlHttp.send(null);
33     }
34     function deleteProductAJAXCallBack()
35     {            
36         if(xmlHttp.readyState==4 && xmlHttp.status==200)
37         {    
38                     
39             if(xmlHttp.responseText=="true")
40             {
41                 alert("商品删除成功！");
42                 var tr=document.getElementById("tr-"+temp);                
43                 tr.parentNode.removeChild(tr);
44             }
45             else
46             {
47                 alert("商品删除失败！");
48             }
49         }
50     }
51 </script>

　　ProductServlet处理请求

View Code

 1 public void deleteProduct(HttpServletRequest request,
 2             HttpServletResponse response) throws ServletException, IOException
 3     {
 4 
 5         response.setContentType("text/html;charset=GBK");
 6         PrintWriter out = response.getWriter();
 7         int pid = 0;
 8         try
 9         {
10             pid = Integer.parseInt(request.getParameter("pid"));
11 
12         }
13         catch (Exception ex)
14         {
15 
16         }
17         String pic = request.getParameter("photo");
18         try
19         {
20             boolean flag = DaoFactory.getProductDaoInstance().doDelete(pid);
21             if (!"nophoto.jpg".equals(pic))
22             {
23                 String pahtName = this.getServletContext().getRealPath("/")
24                         + "product" + java.io.File.separator + "upload"
25                         + java.io.File.separator + pic;
26                 java.io.File file = new java.io.File(pahtName);
27                 if (file.exists())
28                 {
29                     file.delete();
30                 }
31             }
32             out.print(flag);
33         }
34         catch (Exception ex)
35         {
36             ex.printStackTrace();
37         }
38         finally
39         {
40             out.close();
41         }
42 
43     }

　　页面

View Code

 1 <c:if test="${allList!=null}" var="flag" scope="page">
 2     <table border="1" width="100%">
 3         <tr>
 4             <th>商品编号</th>
 5             <th>商品名称</th>
 6             <th>简介</th>
 7             <th>价格</th>
 8             <th>库存数量</th>
 9             <th>点击率</th>
10             <th colspan="2">操作</th>
11         </tr>
12     <c:forEach items="${allList}" var="pro">    
13         <tr id="tr-${pro.pid}">
14             <th>${pro.pid}</th>
15             <th><a href="ProductServlet?status=productinfo&pid=${pro.pid}">${pro.name}</a></th>
16             <th>${pro.note}</th>
17             <th>${pro.price}</th>
18             <th>${pro.amount}</th>
19             <th>${pro.count}</th>
20             <th><a href="ProductServlet?status=updatepre&pid=${pro.pid}&cp=${currentPage}&ls=${lineSize}">修改</a></th>
21             <th><a href="#" onclick="return deleteProduct(${pro.pid},'${pro.photo}')">删除</a></th>            
22         </tr>        
23     </c:forEach>
24     <c:if test="${fn:length(allList)==0}" var="res" scope="page">
25             <tr>                
26                 <th colspan="8" >没有符合条件的数据!</th>
27             </tr>
28         </c:if>    
29     </table>
30 </c:if>

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原文地址：https://www.cnblogs.com/xiongyu/p/2419584.html