Java+Web+会话+聊天室希望对兄弟们有点儿帮助

				package pchat;
				
				import javax.servlet.*;
				import javax.servlet.http.*;
				import java.io.*;
				import java.util.*;
				
				public class Message extends HttpServlet {
				    private static final String CONTENT_TYPE = "text/html; charset=GBK";
				
				    //Initialize global variables
				    public void init() throws ServletException {
				    }
				
				    //Process the HTTP Get request
				    public void doGet(HttpServletRequest request, HttpServletResponse response) throws
				            ServletException, IOException {
				        response.setContentType(CONTENT_TYPE);
				        PrintWriter out = response.getWriter();
				        Random rd=new Random();
				        out.println("");
				        out.println("Message");
				        out.println("");
				        if(rd.nextInt()*10>5){
				            out.println("欢迎来到无限休闲空间!最新消息！！美国总统布什在飞往德国的路上遭到了一群恐怖分子的绑架！最后布什牛...！收买了那群恐怖分子....具体情况请登陆www.lai88.com");
				        }
				        else
				            out.println("欢迎来到无限休闲空间!在二月十七号!!您将会得到一份精美的礼物!!www.lai88.com");
				
				
				        out.println("");
				        out.println("");
				        out.close();
				    }
				
				    //Process the HTTP Post request
				    public void doPost(HttpServletRequest request, HttpServletResponse response) throws
				            ServletException, IOException {
				        doGet(request, response);
				    }
				
				    //Clean up resources
				    public void destroy() {
				    }
				}