config
/**
* WebSocket配置类
* 开启WebSocket支持
*/
@Configuration
public class WebSocketConfig {
@Bean
public ServerEndpointExporter serverEndpointExporter(){
return new ServerEndpointExporter();
}
}
/**
* WebSocket服务端
*/
//客户端向服务器端建立WebSocket连接的URL
@ServerEndpoint("/websocket")
@Component
public class WebSocketServer {
//静态变量，用来记录当前在线连接数，可选
private static int onlineCount = 0;
//concurrent包的线程安全set，用来存放每个客户端对应的MyWebSocket对象
private static CopyOnWriteArraySet<WebSocketServer> webSocketSet = new CopyOnWriteArraySet<WebSocketServer>();
//与某个客户端的连接会话，需要通过它来给客户端发送数据
private Session session;
/**
* 连接建立成功调用的方法
*/
@OnOpen
public void onOpen(Session session){
this.session = session;
webSocketSet.add(this);
addOnlineCount(); //在线数加1
System.out.println("有新窗口开始监听,当前在线人数为" + getOnlineCount());
try {
sendMessage("连接成功");
} catch (IOException e) {
System.out.println("WebSocket IO异常");
}
}
/**
* 连接关闭调用的方法
*/
@OnClose
public void onClose() {
webSocketSet.remove(this); //从set中删除
subOnlineCount(); //在线数减1
System.out.println("有连接关闭！当前在线人数为" + getOnlineCount());
}
/**
* 收到客户端消息后调用的方法
*
* @param message 客户端发送过来的消息
*/
@OnMessage
public void onMessage(String message, Session session) {
System.out.println("收到客户端的信息:" + message);
//群发消息
for (WebSocketServer item : webSocketSet) {
try {
item.sendMessage(message);
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* @param session
* @param error
*/
@OnError
public void onError(Session session, Throwable error) {
System.out.println("发生错误");
error.printStackTrace();
}
/**
* 实现服务器主动推送
*/
public void sendMessage(String message) throws IOException {
this.session.getBasicRemote().sendText(message);
}
/**
* 群发自定义消息
*/
public static void sendInfo(String message) throws IOException {
System.out.println("推送消息内容:" + message);
for (WebSocketServer item : webSocketSet) {
try {
item.sendMessage(message);
} catch (IOException e) {
continue;
}
}
}
public static synchronized int getOnlineCount() {
return onlineCount;
}
public static synchronized void addOnlineCount() {
WebSocketServer.onlineCount++;
}
public static synchronized void subOnlineCount() {
WebSocketServer.onlineCount--;
}
}
Controller层
@RestController
public class WebSocketController {
@RequestMapping("/socket/push")
public String pushMsg(HttpServletRequest request) {
String message = request.getParameter("fuwu");
try {
WebSocketServer.sendInfo(message);
} catch (IOException e) {
e.printStackTrace();
}
return "server";
}
}
页面
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>websocket</title>
</head>
<body>
<h2>websocket</h2>
<h1>服务器端信息显示区</h1>
<textarea id="fuwu" style="width: 200px; height: 300px">
</textarea>
<h1>客户信息输入区</h1>
<textarea id="kehu" style="width: 200px">
</textarea>
<button onclick="myFirst()">发送</button>
<script>
function myFirst() {
socket.send(document.getElementById("kehu").value);
document.getElementById("kehu").value =null;
}
var socket;
if (typeof(WebSocket) == "undefined") {
console.log("您的浏览器不支持WebSocket");
} else {
console.log("您的浏览器支持WebSocket");
//实现化WebSocket对象，指定要连接的服务器地址与端口建立连接
socket = new WebSocket("ws://localhost:8080/websocket");
// 打开事件
socket.onopen = function () {
console.log("Socket已打开");
// socket.send("这是来自客户端的消息:" + new Date());
};
//获得服务器端消息事件
socket.onmessage = function (msg) {
console.log(msg.data);
alert(msg.data);
document.getElementById("fuwu").value = document.getElementById("fuwu").value+"\n"+ msg.data;
};
//关闭事件
socket.onclose = function () {
console.log("Socket已关闭");
};
//发生了错误事件
socket.onerror = function () {
alert("Socket发生了错误");
}
}
</script>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>服务器</title>
</head>
<body>
<h1>
<form action="/socket/push" name="loginfrom" accept-charset="utf-8" method="post">
<textarea id="fuwu" name="fuwu">
</textarea>
<input type="submit" value="群发" >
</form>
</h1>
</body>
</html>
