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@@ -0,0 +1,113 @@
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+package com.ozs.web.core.config;
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+
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+import com.alibaba.fastjson2.JSONObject;
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+import org.springframework.stereotype.Component;
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+
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+import javax.websocket.*;
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+import javax.websocket.server.PathParam;
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+import javax.websocket.server.ServerEndpoint;
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+import java.io.IOException;
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+import java.util.List;
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+import java.util.concurrent.ConcurrentHashMap;
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+import java.util.concurrent.atomic.AtomicInteger;
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+
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+/**
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+ * @Author : sunhh
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+ * @create 2023/3/2 14:57
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+ */
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+@Component
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+@ServerEndpoint(value = "/serverForWebSocket/{userId}")
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+public class Server4WebSocket {
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+ // 存储登录用户的 sid 以及 session
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+ private static ConcurrentHashMap<String, Session> connections = new ConcurrentHashMap<>(32);
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+ // 是WebSocket的Session
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+ private Session session;
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+ // 统计在线人数
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+ private static AtomicInteger onlineCount = new AtomicInteger();
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+
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+ @OnOpen //事件 --登录的人.//当你登录之后建立连接，此方法便会执行
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+ public void onopen(@PathParam("userId") String userId, Session session) {
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+ this.session = session;
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+ System.out.println("seesionId为" + session.getId());
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+ if (connections.containsKey(userId)) {
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+ connections.remove(userId);
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+ connections.put(userId, session);
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+ } else {
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+ onlineCount.incrementAndGet();
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+ connections.put(userId, session);
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+ System.out.println("用户：" + userId + "-" + session.getId() + "上线了-" + session);
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+ System.out.println("在线人数：" + onlineCount);
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+ }
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+ String content = new JSONObject(connections).toString();
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+ System.out.println("在线用户信息：" + content);
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+ }
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+
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+ @OnClose
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+ public void onClose(Session session) {
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+ for (String userId : connections.keySet()) {
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+ if (connections.get(userId).equals(session)) {
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+ System.out.println("用户：" + userId + "-关闭-" + session);
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+ connections.remove(session);
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+ onlineCount.decrementAndGet(); // 在线数减1
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+ }
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+ }
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+ }
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+
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+ @OnMessage
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+ public void onMessage(String msg, Session session) {
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+ System.out.println("服务端收到客户端" + session.getId() + "的消息:" + msg);
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+ // 客户端向服务端发送消息，然后再推送给其他的用户，可以在这里进行设置
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+ try {
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+ sendMessage(msg, session);
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+ } catch (IOException e) {
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+ e.printStackTrace();
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+ }
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+ }
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+
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+ @OnError
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+ public void onError(Session session, Throwable error) {
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+ System.out.println("发生错误");
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+ error.printStackTrace();
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+ }
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+
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+ //推送
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+ public void sendMessage(String msg, Session session) throws IOException {
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+// for (Session session1 : webSocketSet) {
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+// if (session != session1)
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+// session1.getBasicRemote().sendText(msg);
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+// }
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+ System.out.println("推送：" + msg);
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+ session.getBasicRemote().sendText(msg);
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+ }
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+
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+ // 推送给指定的用户群
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+ public void sendMsgToUsers(List<String> ids) {
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+ ids.stream().forEach(s -> {
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+ System.out.println("用户：" + s + "是否能够推送：" + connections.containsKey(s));
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+ if (connections.containsKey(s)) {
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+ if (connections.get(s).isOpen()) {
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+ try {
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+ System.out.println("开始推送");
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+ sendMessage("hello:" + s, connections.get(s));
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+ } catch (IOException e) {
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+ throw new RuntimeException(e);
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+ }
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+ }
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+ }
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+ });
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+ }
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+
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+ // 推送给全部在线用户
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+ public void sendMsgToAll() {
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+ connections.keySet().stream().forEach(s -> {
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+ if (connections.get(s).isOpen()) {
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+ try {
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+ System.out.println("开始推送");
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+ sendMessage("hello:" + s, connections.get(s));
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+ } catch (IOException e) {
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+ throw new RuntimeException(e);
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+ }
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+ }
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+ });
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+ }
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+}
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gao.qiang