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    JSP登录中Session的用法实例详解

    本文实例讲述了JSP登录中Session的用法。分享给大家供大家参考,具体如下:

    登录页面

    %@ 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>
     div style="float:left;margin-top:100px;margin-left:200px;width:400px;height:300px;background:gray;">
     form action="IndexServlet" method="post">
     div style="float:left;width:400px;height:30px;background:gray;margin-top:50px">
      div style="margin-left:70px;float:left;line-height:30px">账号:/div>input style="disply:block;float:left;width:200px;height:30px;border:none;" type="text" name="user"/>
     /div>
     div style="float:left;width:400px;height:30px;background:gray;margin-top:50px">
      div style="margin-left:70px;float:left;line-height:30px">密码:/div>input style="disply:block;float:left;width:200px;height:30px;border:none;" type="text" name="password"/>
     /div>
     div style="float:left;margin-top:50px;width:400px;height:30px;background:gray;">
      input style="float:left;width:60px;height:30px;margin-left:170px;border:none;" type="submit" name="ok" value="登录"/>
     /div>
     /form>
     /div>
    /body>
    /html>
    
    

    检测账号密码以及设置session的IndexServlet

    import java.io.IOException;
    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 IndexServlet
     */
    @WebServlet("/IndexServlet")
    public class IndexServlet extends HttpServlet {
     private static final long serialVersionUID = 1L;
        
      /**
       * @see HttpServlet#HttpServlet()
       */
      public IndexServlet() {
        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
     response.getWriter().append("Served at: ").append(request.getContextPath());
     }
     
     /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     */
     protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
     // TODO Auto-generated method stub
     request.setCharacterEncoding("utf-8");
     String user = request.getParameter("user");
     String password = request.getParameter("password");
     
     String path = request.getContextPath();
     HttpSession session=request.getSession();
     
     if ("1".equals(user)  "1".equals(password)) {
      
      session.setAttribute("name", user);
      response.sendRedirect(path + "/success.jsp");
      
     }else{
      response.sendRedirect(path + "/Index.jsp");
     }
     }
     
    }
    
    

    成功登录页面

    %@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
    !DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
    %
     String path = request.getContextPath();
    %>
    %
     Object name = session.getAttribute("name");
     if(name==null){
     response.sendRedirect(path+"/Index.jsp");
     }
    %>
    html>
     head>
     title>成功页面/title>
     /head>
     body>
     恭喜你,骚年,%=session.getAttribute("name") %>,成功登陆了!
     a href="out.jsp" rel="external nofollow" >注销/a>
     /body>
    /html>

    注销功能的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">
    title>Insert title here/title>
    /head>
    body>
     % 
     String path = request.getContextPath();
     %>
     %
       session.removeAttribute("name");
       response.sendRedirect(path+"/Index.jsp");
      %>
    /body>
    /html>
    
    

    希望本文所述对大家jsp程序设计有所帮助。

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    JSP登录中Session的用法实例详解 JSP,登录,中,Session,的,用法,