1、配置好web服務器環境（tomcat最低7.0以上，建議8.0）
2、java代碼
package com.test.websocket;
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(value = "/message")
public class WebSocketDemo {
@OnOpen
public void openSocket() { // 打開websocket連接
System.out.println("通訊連接已打開，可以進行通話！");
}
@OnMessage
public void dealSocket(String message, Session session) { //數據處理
System.out.println("處理數據。。。");
try {
session.getBasicRemote().sendText(message); //迴應的數據
} catch (IOException e) {
e.printStackTrace();
}
}
@OnClose
public void closeSocket() { //關閉websocket連接
System.out.println("通訊連接已斷開。。。");
}
}3、html頁面
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<script type="text/javascript" src="js/jquery.min.js"></script>
<script type="text/javascript" src="js/bootstrap.min.js"></script>
<script type="text/javascript" src="js/validator/jquery.validate.min.js"></script>
<link type="text/css" rel="stylesheet" href="css/font-awesome.min.css">
<link rel="stylesheet" type="text/css" href="css/bootstrap.min.css">
<!-- <script type="text/javascript" src="js/pages/websocket_demoa.js"></script> -->
<script type="text/javascript">
$(function() {
var webSocket = null ;
var url = "ws://localhost:8080/WebSocketProject/message" ; //通訊地址
init() ;
webSocket.onopen = function(e) { //打開websocket連接
$("#contentDiv").append("<p>連接成功。。。</p>") ;
}
webSocket.onclose = function(e) {//關閉websocket連接
$("#contentDiv").append("<p>退出交談。。。</p>") ;
}
$("#but").on("click",function(){
var info = $("#message").val() ;
webSocket.send(info) ; // 消息發送
$("#contentDiv").append("<p>發送：" + info + "</p>") ;
});
webSocket.onmessage = function(e) { //websocket迴應處理
$("#contentDiv").append("<p>迴應：" + e.data + "</p>") ;
}
function init() {// 初始化操作，判斷瀏覽器是否支持websocket通訊
if ('WebSocket' in window) {
webSocket = new WebSocket(url) ;
} else {
if ('MozWebSocket' in window) {
webSocket = new MozWebSocket(url) ;
} else {
alert("此瀏覽器不支持websocket。。。") ;
}
}
}
})
</script>
</head>
<body>
<form action="message" method="post" class="form-group form-horizontal">
<div id="contentDiv" style="width:600px;height:300px;overflow:scroll;">
</div>
<label class="col-md-1 control-label">消息：</label>
<div class="col-md-3">
<input type="text" id="message" name="message" class="form-control">
</div>
<input type="button" id="but" class="btn btn-success" value="發送">
</form>
</body>
</html>如果要實現一對一，一對多聊，只需要將對話的session用靜態的map保存起來，用的時候取出來即可。