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JSP 新闻发布会

---恢复内容开始---

首先新闻发布会结合了JSP里的Servlet和request对象，response对象还有使用session对象和cookie对象跟踪用户信息等等。。。。。

列表

登陆

这是在Servlet里面写的 LoginServlet 登陆方法

 1 private ServletRequest session;
 2     public void doGet(HttpServletRequest request, HttpServletResponse response)
 3             throws ServletException, IOException {
 4         doPost(request, response);
 5     }
 6     public void doPost(HttpServletRequest request, HttpServletResponse response)
 7             throws ServletException, IOException {
 8         
 9                 try {
10                     BaseDao dd=new BaseDao();
11                     String uname=request.getParameter("uname");
12                     String upwd=request.getParameter("upwd");
13                             String sql="select * from user where userName=? and userPwd=?";
14                             Object [] prams={uname,upwd};
15                                       ResultSet flag=dd.executeSelect(sql, prams);
16                     if(flag.next())
17                     {
18                         HttpSession session=request.getSession();
19                         session.setAttribute("unamesession", uname);
20                         Cookie cookie=new Cookie("unamesession",uname);
21                         cookie.setMaxAge(60*60*24);
22                         response.addCookie(cookie);
23                         //out.print("<script type='text/javascript'>"+"alert('成功登陆!')");
24                         request.getRequestDispatcher("/newspages/admin.jsp").forward(request, response);
25                     }
26                     else
27                     { 
28                         response.sendRedirect("/index.jsp");
29                     }
30                 } catch (SQLException e) {
31                     e.printStackTrace();
32                 }
33     }

这是在jsp主页面上写的跳转

1   <form action="LoginServlet"  method="doPost">
2       <label> 登录名 </label>
3       <input type="text" name="uname" value="" class="login_input" />
4       <label> 密&#160;&#160;码 </label>
5       <input type="password" name="upwd" value="" class="login_input" />
6       <input type="submit" class="login_sub" value="登录" />
7       <label id="error"> </label>
8       <img src="images/friend_logo.gif" alt="Google" id="friend_logo" />
9     </form>

登陆完跳转

接下来是添加

这是在impl包里的NewsDaoimpl.java获取所有返回的方法

1     //添加
2     public boolean Add(News news) {
3         String sql="INSERT INTO news ( ntid ,ntitle ,nauthor ,ncreatedate ,npicpath ,ncontent ,nmodifydate ,nsummary ) VALUES (?,?,?,?,?,?,?,?)";
4         Object [] prams={news.getNtid(),news.getNtitle(),news.getNauthor(),news.getNcreatedate(),news.getNpicpath(),news.getNcontent(),news.getNmodifydate(),news.getNsummary()};
5         boolean flag=executeUpdate(sql,prams);
6         closeAll();
7         return flag;
8     }

这个是添加的Servlet类

 1 public class AddServlet extends HttpServlet {
 2     public AddServlet() {
 3         super();
 4     }
 5     public void destroy() {
 6         super.destroy(); 
 7         
 8     }
 9     public void doGet(HttpServletRequest request, HttpServletResponse response)
10             throws ServletException, IOException {
11             doPost(request,response);
12     }
13     public void doPost(HttpServletRequest request, HttpServletResponse response)
14             throws ServletException, IOException {
15                 if(request.getMethod().equals("GET"))
16                 {
17                     request.getRequestDispatcher("newspages/news_add.jsp").forward(request, response);
18                 }
19                 else
20                 {
21                     String path=request.getContextPath();
22                     String Basepath=request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+"/";
23                     request.setCharacterEncoding("UTF-8");
24                     response.setContentType("text/html;charset=UTF-8");
25                     HttpSession session=request.getSession();
26                     boolean flag=false;
27                     try {
28                         List<News> list=(List<News>) FormUtil.assembleObjectList(request, News.class);
29                         News news= list.get(0);
30                         
31                         news.setNtid(request.getParameter("ntid"));
32                         news.setNtitle(request.getParameter("ntitle"));
33                         news.setNauthor(request.getParameter("nauthor"));
34                         news.setNcreatedate(request.getParameter("nsummaryTime"));
35                         news.setNpicpath(request.getParameter("file"));
36                         news.setNcontent(request.getParameter("ncontent"));
37                         NewsDaoimpl dao=new NewsDaoimpl();
38                         flag=dao.Add(news);
39                     } catch (NoSuchFieldException e) {
40                         // TODO Auto-generated catch block
41                         e.printStackTrace();
42                     } catch (Exception e) {
43                         // TODO Auto-generated catch block
44                         e.printStackTrace();
45                     }
46                     if(flag)
47                     {
48                         response.sendRedirect(path+"/newspages/admin.jsp");
49                     }
50                     else
51                     {
52                         request.getRequestDispatcher("/index.jsp").forward(request, response);
53                     }
54                 }
55     }
56 
57 }

View Code

接下来这个是添加的jsp

 1  <form action="<%=request.getContextPath()%>/AddServlet" method="post">
 2       <p>
 3         <label> 主题 </label>
 4         <select name="ntid">
 5         <%--
 6         <c:forEach var="item" items="${typelist} }">
 7         <option value="1">
 8         
 9             ${item.ntname}
10        
11         </option>
12          </c:forEach>
13         --%>
14         
15         
16           <option value="1">选择</option>
17           <option value='1'> 国内 </option>
18           <option value='2'> 国际 </option>
19           <option value='3'> 军事 </option>
20           <option value='4'> 体育 </option>
21           <option value='5'> 娱乐 </option>
22           <option value='6'> 社会 </option>
23           <option value='7'> 财经 </option>
24           <option value='8'> 科技 </option>
25           <option value='9'> 健康 </option>
26           <option value='10'> 汽车 </option>
27           <option value='11'> 教育 </option>
28           <option value='12'> 房产 </option>
29           <option value='13'> 家居 </option>
30           <option value='14'> 旅游 </option>
31           <option value='15'> 文化 </option>
32           <option value='16'> 其他 </option>
33           </select>
34       </p>
35       <p>
36         <label> 标题 </label>
37         <input name="ntitle" type="text" class="opt_input" />
38       </p>
39       <p>
40         <label> 作者 </label>
41         <input name="nauthor" type="text" class="opt_input" />
42       </p>
43       <p>
44         <label> 时间 </label>
45         <%--<textarea name="nsummary" cols="40" rows="3"></textarea>--%>
46         <input id="meeting" type="date" value="2015-11-10" name="nsummaryTime"/>
47       </p>
48       <p>
49         <label> 内容 </label>
50         <textarea name="ncontent" cols="70" rows="10"></textarea>
51       </p>
52       <p>
53         <label> 上传图片 </label>
54         
55         <input name="file" type="file" class="opt_input" />
56       </p>
57       <input name="action" type="hidden" value="addnews"/>
58       <input type="submit" value="提交" class="opt_sub" action="NewsAddServlet" method="doPost" />
59       <input type="reset" value="重置" class="opt_sub" />
60     </form>

View Code

添加主题

这是在impl包里的NewsDaoimpl.java获取所有返回的方法

1 //添加主题
2         @Override
3         public boolean Addtype(Type type) {
4                 String sql="INSERT INTO TYPE(ntname) VALUES(?)";
5                 Object [] prams={type.getNtname()};
6                 boolean flag=executeUpdate(sql, prams);
7                 closeAll();
8             return flag;
9         }

这是添加主题的Servlet类

 1 public class TypezhuAddServlet extends HttpServlet {
 2 
 3     public void doGet(HttpServletRequest request, HttpServletResponse response)
 4             throws ServletException, IOException {
 5         doPost(request,response);
 6     }
 7 
 8 
 9     public void doPost(HttpServletRequest request, HttpServletResponse response)
10             throws ServletException, IOException {
11             if(request.getMethod().equals("GET"))
12             {
13                 request.getRequestDispatcher("newspages/news_add.jsp").forward(request, response);
14             }
15             else
16             {
17                 String path=request.getContextPath();
18                 request.setCharacterEncoding("UTF-8");
19                 boolean flag=false;
20                 try {
21                     List<Type> list=(List<Type>) FormUtil.assembleObjectList(request, Type.class);
22                     Type type=list.get(0);
23                     type.setNtname(request.getParameter("ntname"));
24                     NewsDaoimpl dao=new NewsDaoimpl();
25                     flag=dao.Addtype(type);
26                 } catch (NoSuchFieldException e) {
27                     e.printStackTrace();
28                 } catch (Exception e) {
29                     e.printStackTrace();
30                 }
31                 if(flag)
32                 {
33                     response.sendRedirect(path+"/newspages/admin.jsp");
34                 }
35                 else
36                 {
37                     request.getRequestDispatcher("/index.jsp").forward(request, response);
38                 }
39             }
40     }
41 
42 }

View Code

添加主题的jsp

 1  <div id="opt_area">
 2     <h1 id="opt_type"> 添加主题： </h1>
 3     <form action="<%=request.getContextPath()%>/TypezhuAddServlet" method="post" onsubmit="return check()">
 4      
 5       <p>
 6         <label> 主题名称 </label>
 7         <input name="ntname" type="text" class="opt_input" id="tname"/>
 8       </p>
 9       <input name="action" type="hidden" value="addtopic"/>
10       <input type="submit" value="提交" class="opt_sub" />
11       <input type="reset" value="重置" class="opt_sub" />
12     </form>
13   </div>
14 </div>

View Code

动态加载新闻主题和新闻分页

这是在impl包里的NewsDaoimpl.java获取所有返回的方法

 1     //分页查询
 2     public List<News> selectNews() {
 3         QueryRunner query=new QueryRunner();
 4         
 5             String sql="SELECT * FROM news WHERE nid LIMIT 3";
 6             List<News> list=null;
 7              try {
 8                 list = query.query(getConnection(), sql,new BeanListHandler<News>(News.class));
 9             } catch (SQLException e) {
10                 e.printStackTrace();
11             }
12         return list;
13     }
14     /*
15      * 根据新闻类型编号查询新闻
16      */
17     public List<News> selectNewsByTypeid(int tid) {
18         QueryRunner query=new QueryRunner();
19         String sql="select * from news where ntid=?";
20         List<News> list=null;
21         try {
22             list = query.query(getConnection(), sql, new BeanListHandler<News>(News.class),tid);
23         } catch (SQLException e) {
24             e.printStackTrace();
25         }
26         return list;
27     }

View Code

这是分页和动态主题的Servlet

 1 public class TypeServlet extends HttpServlet {
 2     public void doGet(HttpServletRequest request, HttpServletResponse response)
 3             throws ServletException, IOException {
 4         doPost(request,response);
 5     }
 6     public void doPost(HttpServletRequest request, HttpServletResponse response)
 7             throws ServletException, IOException {
 8             NewsDaoimpl dao=new NewsDaoimpl();
 9             List<Type> list = dao.type();
10             request.setAttribute("typelist",list);
11             
12             String date= request.getParameter("tid");
13             if(date!=null && date.equals(""))
14             {
15                 int tid=Integer.parseInt(date);
16                 NewsDaoimpl newsdao=new NewsDaoimpl();
17                 List<News> listdao=newsdao.selectNewsByTypeid(tid);
18                 request.setAttribute("newslist", listdao);
19             }
20             else
21             {
22                 NewsDaoimpl topdao=new NewsDaoimpl();
23                 List<News> newslist=topdao.selectNews();
24                 request.setAttribute("newslist", newslist);
25             }
26             
27             
28             request.getRequestDispatcher("/index.jsp").forward(request, response);
29     }
30 
31 }

View Code

主页的jsp

 1 <div class="main">
 2     <div class="class_type"> <img src="images/class_type.gif" alt="新闻中心" /> </div>
 3     <div class="content">
 4       <ul class="class_date">
 5         <li id='class_month'>
 6         
 7         <c:forEach var="item" items="${typelist}">
 8         <a style="color:pink;" href='${pageContext.request.contextPath}/TypeServlet?tid=${item.ntid}'>
 9         ${item.ntname}
10         </a>
11         </c:forEach>
12         </li>
13       </ul>
14       <ul class="classlist">
15       <c:forEach var="item" items="${newslist}">
16           <li><a href='newspages/news_read.jsp'>${item.ntitle }</a><span>${item.ncreatedate }</span></li>
17       </c:forEach>
18         <p align="right"> 当前页数:[1/2]&nbsp; <a href="#">下一页</a> <a href="#">末页</a> </p>
19       </ul>
20     </div>

View Code

待续、、

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原文地址：https://www.cnblogs.com/xiaotangtang/p/4980505.html