聊天室源代码

package com.action; import java.io.IOException; import java.io.PrintWriter; import java.util.ArrayList; import javax.servlet.ServletContext; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; public class chat extends HttpServlet { /** * The doGet method of the servlet. <br> * * This method is called when a form has its tag value method equals to get. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */ public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html"); PrintWriter out = response.getWriter(); doPost(request,response); } /** * The doPost method of the servlet. <br> * * This method is called when a form has its tag value method equals to post. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */ public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("gb2312"); response.setContentType("text/html;charset=gb2312"); PrintWriter out = response.getWriter(); HttpSession session=request.getSession(); String action=request.getParameter("action"); if(action!=null&&action.equals("login")){ String name=request.getParameter("name"); session.setAttribute("name",name); request.getRequestDispatcher("../main.htm").forward(request,response); } if(action!=null&&action.equals("send")){ String name=session.getAttribute("name").toString(); String object=request.getParameter("object"); String content=request.getParameter("content"); String all="<a href='#'>"+name+"</a>"+"对"+"<a href='#'>"+object+"</a>"+"说:"+content+"<br>"; System.out.println(all); ServletContext application=request.getSession().getServletContext(); if(application.getAttribute("content")==null){ application.setAttribute("content",all); } else{ all=all+application.getAttribute("content"); application.setAttribute("content",all); } request.getRequestDispatcher("../send.jsp?object="+object+"").forward(request,response); //System.out.print("hello"); } if(action!=null&&action.equals("out")){ session.invalidate(); out.print("<script>alert('asdasdasd');parent.location.href='../index.htm';</script>"); } out.flush(); out.close(); } }