第二步：通过servlet处理import java.io.IOException; import java.io.PrintWriter; import java.util.ArrayList; import java.util.List; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class validateServlet extends HttpServlet { public void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { //获得用户的信息 String username=req.getParameter("username"); String password=req.getParameter("password"); String repassword=req.getParameter("repassword"); String shuoming=req.getParameter("shuoming");//说明 String []sex=req.getParameterValues("sex");//获得性别 String []aihao=req.getParameterValues("aihao");//获得兴趣 String []add=req.getParameterValues("add");//获得地址 //String repassword=req.getParameter("repassword"); //String repassword=req.getParameter("repassword"); List<String> list=new ArrayList<String>(); List<String> xingqu=new ArrayList<String>(); if (null=="username"||"".equals(username)) { list.add("there can't be a blank!"); } if (password==null||password.length()<6||password.length()>10) { list.add(" the password's length must Between6 and 10 !"); } if (repassword==null||repassword.length()<6||repassword.length()>10) { list.add(" the password's length must Between 6 and 10!"); } if (password!=null&&repassword!=null&&!password.equals(repassword)) { list.add("the two password isn't the same!"); } if (list.isEmpty()) { req.setAttribute("username",username); req.setAttribute("password",password); req.setAttribute("repassword",repassword); req.setAttribute("shuoming",shuoming);//说明 for(int i=0;i<sex.length;i++)//性别 req.setAttribute("sex",sex[i]); //兴趣 for(int i=0;i<aihao.length;i++) { xingqu.add(aihao[i]); } req.setAttribute("aihao",xingqu+" "); //地址 for(int i=0;i<add.length;i++) req.setAttribute("add",add[i]); //说明 req.getRequestDispatcher("success.jsp").forward(req,resp); } else { req.setAttribute("list",list); req.getRequestDispatcher("unsuccess.jsp").forward(req,resp); } } }
最近在学习jsp先写了个登陆界面的例子第一步：<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <html> <head> <title> 登录界面 </title> <%--客户端验证服务器端验证未启动 --%> <script type="text/javascript"> function validate() { //判断姓名 var username=document.getElementById("username1"); if (username.value.length==0) { alert("用户名不能为空！"); return false; } //判断密码 var password=document.getElementById("password1"); var repassword=document.getElementById("repassword1"); if (password.value.length<6||password.value.length>10) { alert("密码长度不能少于六位超过10位！"); return false; } if (repassword.value.length<6||repassword.value.length>10) { alert("密码长度不能少于六位超过10位！"); return false; } if (password.value != repassword.value) { alert("两次密码不相同！"); return false; } //判断性别 var f=document.getElementById("f"); var m=document.getElementById("m"); if (!f.checked&&!m.checked) { alert("性别没选择！"); return false; } //判断兴趣选项 var aihao=document.getElementsByName("aihao"); var m=0; for ( var i=0;i<aihao.length;i++) { if (aihao[i].checked) { m++; } } if (m<2) { alert("兴趣必须多于两个！"); return false; } //判断说明是否为空 var txtValue=document.getElementById("txtTest").value; if (txtValue.length<10) { alert("说明长度不能少于十个字母！"); return false; } return true; } </script> </head> <body> <form onsubmit="return validate();" action="validateServlet" > <%//服务器端验证：<form action="validateServlet" > %> <table> <tr> <td >用户登录：</td> </tr> <tr> <td ></td> </tr> <tr> <td>用户名：</td> <td><input type="text" name="username" id="username1"></td> </tr> <tr> <td>密 码：</td> <td><input type="password" name="password" id="password1"></td> </tr> <tr> <td>重新输入密码：</td> <td><input type="password" name="repassword" id="repassword1"></td> </tr> <tr> <td>性 别：</td> <td>男：<input type="radio" name="sex" value="female" id="f" ></td> <td>女：<input type="radio" name="sex" id="male"></td> </tr> <tr> <td>兴 趣：</td> <td>篮球：<input type="checkbox" name="aihao" value="basketball"></td> <td>足球：<input type="checkbox"" name="aihao" value="football" ></td> <td>听歌：<input type="checkbox"" name="aihao" value="music"></td> <td>书法：<input type="checkbox"" name="aihao" value="writing"></td> </tr> <tr> <td>地 址：</td> <td><select name="add" size="1"> <option value="shanghai" selected>上海 <option value="yantai" >烟台 <option value="beijing" >北京 </select></td> </tr> <tr> <td>说 明：</td> <td><textarea name="shuoming" clos="20" rows="5" id="txtTest"></textarea></td> </tr> <tr> <td><input type="submit" value="提交" ></td> <td><input type="reset" value="重置"></td> </tr> </table> </form> <a href="http://www.baidu.com">百度</a> </body> </html>登陆成功页面：<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <html> <head> <title>成功登陆页面</title> </head> <body> <%= "个人信息："+"<br>" +"<br>"+"<br>"%> <%= "姓名: "+request.getAttribute("username")+"<br>" %> <%= "密码: "+request.getAttribute("password")+"<br>" %> <%= "性别: "+request.getAttribute("sex")+"<br>" %> <%= "兴趣: "+request.getAttribute("aihao")+"<br>" %> <%= "地址: "+request.getAttribute("add") +"<br>"%> <%= "说明 : "+request.getAttribute("shuoming")+"<br>" %> </body> </html>