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@@ -0,0 +1,122 @@
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+package com.keao.edu.user.controller;
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+
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+import org.slf4j.Logger;
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+import org.slf4j.LoggerFactory;
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+import org.springframework.stereotype.Component;
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+
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+import javax.annotation.PostConstruct;
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+import javax.websocket.*;
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+import javax.websocket.server.ServerEndpoint;
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+import java.io.IOException;
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+import java.util.concurrent.CopyOnWriteArraySet;
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+import java.util.concurrent.atomic.AtomicInteger;
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+
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+@ServerEndpoint(value = "/ws/asset")
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+@Component
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+public class WebSocketServer {
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+
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+ @PostConstruct
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+ public void init() {
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+ System.out.println("websocket 加载");
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+ }
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+ private static Logger log = LoggerFactory.getLogger(WebSocketServer.class);
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+ private static final AtomicInteger OnlineCount = new AtomicInteger(0);
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+ // concurrent包的线程安全Set,用来存放每个客户端对应的Session对象。
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+ private static CopyOnWriteArraySet<Session> SessionSet = new CopyOnWriteArraySet<Session>();
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+
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+
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+ /**
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+ * 连接建立成功调用的方法
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+ */
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+ @OnOpen
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+ public void onOpen(Session session) {
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+ SessionSet.add(session);
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+ int cnt = OnlineCount.incrementAndGet(); // 在线数加1
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+ log.info("有连接加入,当前连接数为:{}", cnt);
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+ SendMessage(session, "连接成功");
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+ }
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+
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+ /**
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+ * 连接关闭调用的方法
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+ */
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+ @OnClose
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+ public void onClose(Session session) {
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+ SessionSet.remove(session);
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+ int cnt = OnlineCount.decrementAndGet();
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+ log.info("有连接关闭,当前连接数为:{}", cnt);
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+ }
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+
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+ /**
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+ * 收到客户端消息后调用的方法
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+ *
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+ * @param message
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+ * 客户端发送过来的消息
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+ */
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+ @OnMessage
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+ public void onMessage(String message, Session session) {
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+ log.info("来自客户端的消息:{}",message);
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+ SendMessage(session, "收到消息,消息内容:"+message);
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+
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+ }
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+
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+ /**
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+ * 出现错误
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+ * @param session
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+ * @param error
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+ */
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+ @OnError
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+ public void onError(Session session, Throwable error) {
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+ log.error("发生错误:{},Session ID: {}",error.getMessage(),session.getId());
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+ error.printStackTrace();
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+ }
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+
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+ /**
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+ * 发送消息,实践表明,每次浏览器刷新,session会发生变化。
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+ * @param session
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+ * @param message
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+ */
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+ public static void SendMessage(Session session, String message) {
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+ try {
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+ session.getBasicRemote().sendText(String.format("%s (From Server,Session ID=%s)",message,session.getId()));
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+ } catch (IOException e) {
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+ log.error("发送消息出错:{}", e.getMessage());
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+ e.printStackTrace();
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+ }
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+ }
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+
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+ /**
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+ * 群发消息
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+ * @param message
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+ * @throws IOException
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+ */
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+ public static void BroadCastInfo(String message) throws IOException {
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+ for (Session session : SessionSet) {
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+ if(session.isOpen()){
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+ SendMessage(session, message);
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+ }
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+ }
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+ }
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+
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+ /**
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+ * 指定Session发送消息
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+ * @param sessionId
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+ * @param message
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+ * @throws IOException
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+ */
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+ public static void SendMessage(String message,String sessionId) throws IOException {
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+ Session session = null;
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+ for (Session s : SessionSet) {
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+ if(s.getId().equals(sessionId)){
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+ session = s;
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+ break;
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+ }
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+ }
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+ if(session!=null){
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+ SendMessage(session, message);
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+ }
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+ else{
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+ log.warn("没有找到你指定ID的会话:{}",sessionId);
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+ }
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+ }
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+
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+}
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