websocket

http://www.oschina.net/translate/java-ee-html5-websocket-example

    服务端代码：

    

package com.byteslounge.websockets;
 
import java.io.IOException;
 
import javax.websocket.OnClose;
import javax.websocket.OnMessage;
import javax.websocket.OnOpen;
import javax.websocket.Session;
import javax.websocket.server.ServerEndpoint;
 
@ServerEndpoint("/websocket")
public class WebSocketTest {
 
  @OnMessage
  public void onMessage(String message, Session session)
    throws IOException, InterruptedException {
   
    // Print the client message for testing purposes
    System.out.println("Received: " + message);
   
    // Send the first message to the client
    session.getBasicRemote().sendText("This is the first server message");
   
    // Send 3 messages to the client every 5 seconds
    int sentMessages = 0;
    while(sentMessages < 3){
      Thread.sleep(5000);
      session.getBasicRemote().
        sendText("This is an intermediate server message. Count: "
          + sentMessages);
      sentMessages++;
    }
   
    // Send a final message to the client
    session.getBasicRemote().sendText("This is the last server message");
  }
   
  @OnOpen
  public void onOpen() {
    System.out.println("Client connected");
  }
 
  @OnClose
  public void onClose() {
    System.out.println("Connection closed");
  }
}

    客户端代码：  

 var webSocket =
      new WebSocket('ws://localhost:8080/byteslounge/websocket');
 
    webSocket.onerror = function(event) {
      onError(event)
    };
 
    webSocket.onopen = function(event) {
      onOpen(event)
    };
 
    webSocket.onmessage = function(event) {
      onMessage(event)
    };
 
    function onMessage(event) {
      document.getElementById('messages').innerHTML
        += '<br />' + event.data;
    }
 
    function onOpen(event) {
      document.getElementById('messages').innerHTML
        = 'Connection established';
    }
 
    function onError(event) {
      alert(event.data);
    }
 
    function start() {
      webSocket.send('hello');
      return false;
    }

来自为知笔记(Wiz)