中南民族大学JavaEE实验报告（聊天室，购物车）

/*

* To change this template, choose Tools | Templates * and open the template in the editor. */

package com.servlet;

import java.io.IOException; import java.io.PrintWriter; import javax.servlet.*; import javax.servlet.http.*; /** *

* @author huxiao */

public class loginsucess extends HttpServlet {

protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //TODO Method stub generated by Lomboz response.setContentType(\

String name=request.getParameter(\ HttpSession session=request.getSession();

String history =(String)getServletContext().getAttribute(\ if(history==null) history=\

String temp =(String)getServletContext().getAttribute(\ if(temp==null) temp=\

PrintWriter out = response.getWriter(); try{

out.println(\http-equiv=\\\content=\\%url=response.encodeURL(\\\

out.println(\

out.println(\ align=\\\欢迎来到聊天室 \

out.println(\bgcolor=#00aabb behavior=alternate><<<<<<<<希望大家聊的开心>>>>>>>\

out.println (\在线人数：\历史访问次数：\ out.println(\

String tempHistory=(String)getServletContext().getAttribute(\ if(tempHistory==null) tempHistory=\

out.println(\cols=\\\ rows=\\\name=\\\style=\\\ out.println(); out.println(\ out.println(\

out.println(\ out.println(\ cols=\\\ rows=\\\style=\\\name=\\\

out.println(\

out.println(\ name=\\\发送\\\ out.println(\ name=\\\取消\\\ out.println(\

out.println(\ }finally{ out.close(); } }

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

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

HttpSession session=request.getSession();

String user=request.getParameter(\

session.setAttribute(\ processRequest(request,response); } }

5、 登录失败 faillogin.java /*

* To change this template, choose Tools | Templates * and open the template in the editor. */

package com.servlet;

import java.io.*;

import javax.servlet.*; import javax.servlet.http.*; /** *

* @author huxiao */

public class loginfail extends HttpServlet { protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //TODO Method stub generated by Lomboz doPost(request,response); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //TODO Method stub generated by Lomboz response.setContentType(\ PrintWriter out = response.getWriter(); out.println(\

out.println(\ out.println(\ out.println(\登录失败\ out.println(\ out.println(\ out.println(\ out.println(\登录失败！！！请重新登录。。。\

RequestDispatcher dispatcher =request.getRequestDispatcher(\ dispatcher.include(request, response); out.println(\ out.println(\ out.close(); } }

6、 任务监听 sessionListener.java

/*

* To change this template, choose Tools | Templates * and open the template in the editor. */

package com.servlet;

import javax.servlet.annotation.WebListener; import javax.servlet.http.HttpSessionEvent; import javax.servlet.http.HttpSessionListener; /**

* Web application lifecycle listener. *

* @author Josh */

@WebListener()

public class SessionListener implements HttpSessionListener {

@Override

public void sessionCreated(HttpSessionEvent se) {

String current=(String)se.getSession().getServletContext().getAttribute(\ if(current==null) current=\

int c=Integer.parseInt(current); c++;

current=String.valueOf(c);

se.getSession().getServletContext().setAttribute(\

String his=(String)se.getSession().getServletContext().getAttribute(\ if(his==null) his=\

int total=Integer.parseInt(his)+1; his=String.valueOf(total);

se.getSession().getServletContext().setAttribute(\ }

@Override

public void sessionDestroyed(HttpSessionEvent se) {

String current=(String)se.getSession().getServletContext().getAttribute(\ if(current==null) current=\

int c=Integer.parseInt(current); c--;

current=String.valueOf(c);

se.getSession().getServletContext().setAttribute(\ } }

7、 计数文件 CountFile.java

/*

* To change this template, choose Tools | Templates * and open the template in the editor. */

package com.servlet; import java.io.*; /** *

* @author huxiao */