截获Session的简单案例 

package com.web;

import java.io.*;
import javax.servlet.*;
import javax.servlet.annotation.*;
import javax.servlet.http.*;
@WebServlet("/scoped-vars")
public class ScopedVars extends HttpServlet {
@Override
public void doGet(HttpServletRequest request,HttpServletResponse
    response)throws ServletException, IOException {
        request.setAttribute("attribute1", "First Value");
        HttpSession session = request.getSession();
        session.setAttribute("attribute2", "Second Value");
        RequestDispatcher dispatcher = request.getRequestDispatcher("scoped-vars.jsp");
        dispatcher.forward(request, response);
}
}
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<table border=5 align="center">
<tr><th class="title">截获session</th></tr>
</table>
<p>
<ul>
<!-- 采用el表达式之前 -->
<li><b>request attribute1: <input type="text" value=<%=request.getAttribute("attribute1")%>></b>
<li><b>session attribute2: <input type="text" value=<%=session.getAttribute("attribute2")%>></b>

<!-- 采用el表达式之后 -->
<li><b>request attribute1:</b> ${attribute1}
<li><b>session attribute2:</b> ${attribute2}


</ul>
</body>
</html>

 

 

 

posted @ 2020-06-27 00:24  MyNorth  阅读(178)  评论(0)    收藏  举报