标签：message void col 成功 puts 发送数据 host continue 回调
package org.hxm.webSocket; import java.io.IOException; import java.util.concurrent.CopyOnWriteArraySet; import java.util.concurrent.atomic.AtomicInteger; import javax.websocket.OnClose; import javax.websocket.OnError; import javax.websocket.OnMessage; import javax.websocket.OnOpen; import javax.websocket.Session; import javax.websocket.server.ServerEndpoint; import org.springframework.stereotype.Component; @ServerEndpoint(value = "/websocket") @Component public class MyWebSocket { // 静态变量，用来记录当前在线连接数。应该把它设计成线程安全的。 private static AtomicInteger onlineCount = new AtomicInteger(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<MyWebSocket> webSocketSet = new CopyOnWriteArraySet<MyWebSocket>(); // 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); // 加入set中 onlineCount.incrementAndGet(); // 在线数加1 System.out.println("有新连接加入！当前在线人数为" + getOnlineCount()); try { sendMessage("有新连接加入"); } catch (IOException e) { System.out.println("IO异常"); } } /** * 连接关闭调用的方法 */ @OnClose public void onClose() { webSocketSet.remove(this); // 从set中删除 onlineCount.decrementAndGet(); // 在线数减1 System.out.println("有一连接关闭！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("来自客户端的消息:" + message); // 群发消息 for (MyWebSocket item : webSocketSet) { try { item.sendMessage(message); } catch (IOException e) { e.printStackTrace(); } } } /** * 发生错误时调用 */ @OnError public void onError(Session session, Throwable error) { System.out.println("发生错误"); error.printStackTrace(); } public void sendMessage(String message) throws IOException { this.session.getBasicRemote().sendText(message); // this.session.getAsyncRemote().sendText(message); } /** * 群发自定义消息 */ public static void sendInfo(String message) throws IOException { for (MyWebSocket item : webSocketSet) { try { item.sendMessage(message); } catch (IOException e) { continue; } } } public static synchronized int getOnlineCount() { return onlineCount.getAndIncrement(); } }
package org.hxm.webSocket; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.web.socket.server.standard.ServerEndpointExporter; @Configuration public class WebSocketConfig { @Bean public ServerEndpointExporter serverEndpointExporter() { return new ServerEndpointExporter(); } }
package org.hxm.webSocket; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.util.Scanner; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication public class Application { public static void main(String[] args) throws InterruptedException { SpringApplication.run(Application.class, args); }
<html>
<head>
<title>My WebSocket</title>
</head>
<body>
Welcome<br/>
<input id="text" type="text" /><button onclick="send()">Send</button> <button onclick="closeWebSocket()">Close</button>
<div id="message">
</div>
</body>
<script type="text/javascript">
var websocket = null;
//判断当前浏览器是否支持WebSocket
if(‘WebSocket‘ in window){
websocket = new WebSocket("ws://localhost:8080/websocket");
}
else{
alert(‘Not support websocket‘)
}
//连接发生错误的回调方法
websocket.onerror = function(){
setMessageInnerHTML("error");
};
//连接成功建立的回调方法
websocket.onopen = function(event){
setMessageInnerHTML("open");
}
//接收到消息的回调方法
websocket.onmessage = function(event){
setMessageInnerHTML(event.data);
}
//连接关闭的回调方法
websocket.onclose = function(){
setMessageInnerHTML("close");
}
//监听窗口关闭事件，当窗口关闭时，主动去关闭websocket连接，防止连接还没断开就关闭窗口，server端会抛异常。
window.onbeforeunload = function(){
websocket.close();
}
//将消息显示在网页上
function setMessageInnerHTML(innerHTML){
document.getElementById(‘message‘).innerHTML += innerHTML + ‘<br/>‘;
}
//关闭连接
function closeWebSocket(){
websocket.close();
}
//发送消息
function send(){
var message = document.getElementById(‘text‘).value;
websocket.send(message);
}
</script>
</html>
标签：message void col 成功 puts 发送数据 host continue 回调
原文地址：https://www.cnblogs.com/JavaHxm/p/11211665.html
