var socket;   
  //实际生产中，id可以从session里面拿用户id
  var id  = Math.random().toString(36).substr(2);
  if(!window.WebSocket){  
      window.WebSocket = window.MozWebSocket;  
  }  
   
  if(window.WebSocket){  
      socket = new WebSocket("ws://118.89.129.25:1001/xiaoguo/v1/attendance");  
        
      socket.onmessage = function(event){             
            appendln("receive:" + event.data);  
      };  
   
      socket.onopen = function(event){  
            appendln("WebSocket is opened");  
            login(); 
      };  
   
      socket.onclose = function(event){  
            appendln("WebSocket is closed");  
      };  
  }else{  
        alert("WebSocket is not support");  
  }  

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;

public class WebServer {
    public static final int port = 10010;   
    public static final String host = "118.89.129.25";
    public static void main(String[] args) throws IOException{  
          
        try{  
                Socket socket=new Socket(host,1001);  
                System.out.println("client start ...");  
                //向本机的52000端口发出客户请求  
                BufferedReader br=new BufferedReader(new InputStreamReader(System.in));  
                //由系统标准输入设备构造BufferedReader对象  
                PrintWriter write=new PrintWriter(socket.getOutputStream());  
                //由Socket对象得到输出流，并构造PrintWriter对象  
                BufferedReader in=new BufferedReader(new InputStreamReader(socket.getInputStream()));  
                //由Socket对象得到输入流，并构造相应的BufferedReader对象  
                String readline;  
                readline=br.readLine(); //从系统标准输入读入一字符串  
                while(!readline.equals("end")){  
                    //若从标准输入读入的字符串为 "end"则停止循环  
                    write.println(readline);  
                    //将从系统标准输入读入的字符串输出到Server  
                    write.flush();  
                    //刷新输出流，使Server马上收到该字符串  
                    System.out.println("Client:"+readline);  
                    //在系统标准输出上打印读入的字符串  
                    System.out.println("Server:"+in.readLine());  
                    //从Server读入一字符串，并打印到标准输出上  
                    readline=br.readLine(); //从系统标准输入读入一字符串  
                } //继续循环  
                write.close(); //关闭Socket输出流  
                in.close(); //关闭Socket输入流  
                socket.close(); //关闭Socket                         
            }catch(Exception e) {  
                System.out.println("can not listen to:"+e);//出错，打印出错信息  
            }  
        }  
}