session的用法

 <%@ page language="java" contentType="text/html; charset=UTF-8"

     pageEncoding="UTF-8"%>

 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

 <html>

 <head>

 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

 <title>Insert title here</title>

 </head>

 <script type="text/javascript" src="../js/jquery-1.7.2.js"></script>

 <script type="text/javascript">

 $(function(){

     $(":button").click(function(){

         document.getElementsByTagName("form")[0].submit();

     });

 })

 </script>

 <body>

 <form action="../loginSrevlet" method="post">

 用户名：<input type="text" name="userName"/><br/>

 密码：<input type="password" name="password"/><br/>

 <button type="button">登录</button>

 <button type="reset">重置</button>

 </form>

 </body>

 </html>

 package com.zdsofe.servlet1;

 import java.io.IOException;

 import java.util.ArrayList;

 import java.util.Enumeration;

 import java.util.List;

 import javax.servlet.ServletException;

 import javax.servlet.annotation.WebServlet;

 import javax.servlet.http.HttpServlet;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 import javax.servlet.http.HttpSession;

 /**

  * Servlet implementation class loginSrevlet

  */

 @WebServlet("/loginSrevlet")

 public class loginSrevlet extends HttpServlet {

     private static final long serialVersionUID = 1L;

     /**

      * @see HttpServlet#HttpServlet()

      */

     public loginSrevlet() {

         super();

         // TODO Auto-generated constructor stub

     }

     /**

      * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)

      */

     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

         // TODO Auto-generated method stub

     }

     /**

      * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)

      */

     protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

         //编码格式

         request.setCharacterEncoding("utf-8");

         response.setCharacterEncoding("utf-8");

         response.setContentType("text/heml charset=utf-8");

         //得到表单的数据

        Enumeration<String > name=request.getParameterNames();

        List<String> list=new ArrayList<String>();

        while(name.hasMoreElements())

        {

            list.add(request.getParameter(name.nextElement()));

        }

        //创建Session对象

        HttpSession ss= request.getSession();

        ss.setAttribute("uName", list.get(0));

        response.sendRedirect("/webProject1/jsp/loginWelcome.jsp");

     }

 }

 <%@ page language="java" contentType="text/html; charset=UTF-8"

     pageEncoding="UTF-8"%>

 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

 <html>

 <head>

 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

 <!--  实现3秒后跳转功能-->

 <!-- <meta content="3;url=loginBottom.jsp" http-equiv="refresh"> -->

 <title>Insert title here</title>

 </head>

 <body>

 <%=session.getAttribute("uName") %>

 <button onclick="location.href='loginBottom.jsp'">跳转</button>

 三秒后跳转....

 </body>

 </html>

 <%@ page language="java" contentType="text/html; charset=UTF-8"

     pageEncoding="UTF-8"%>

 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

 <html>

 <head>

 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

 <title>Insert title here</title>

 </head>

 <body>

 Welcome!

 </body>

 </html>

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