Springboot+websocket 实现多人聊天室/单人聊天

package com.test.wbsocket.socket; import com.alibaba.fastjson.JSON; import com.alibaba.fastjson.JSONObject; import com.google.common.collect.Maps; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.stereotype.Component; import javax.websocket.*; import javax.websocket.server.PathParam; import javax.websocket.server.ServerEndpoint; import java.io.IOException; import java.util.Map; import java.util.Set; import java.util.concurrent.ConcurrentHashMap; import java.util.concurrent.CopyOnWriteArraySet; /** * @author 2018年5月18日16:11:48 */ @Component @ServerEndpoint("/websocket/{username}") public class WebSocket { private Logger logger = LoggerFactory.getLogger(this.getClass()); /** * 在线人数 */ public static int onlineNumber = 0; /** * 以用户的姓名为key，WebSocket为对象保存起来 */ private static Map<String, WebSocket> clients = new ConcurrentHashMap<String, WebSocket>(); /** * 会话 */ private Session session; /** * 用户名称 */ private String username; /** * 建立连接 * * @param session */ @OnOpen public void onOpen(@PathParam("username") String username, Session session) { onlineNumber++; logger.info("现在来连接的客户id："+session.getId()+"用户名："+username); this.username = username; this.session = session; logger.info("有新连接加入！ 当前在线人数" + onlineNumber); try { //messageType 1代表上线 2代表下线 3代表在线名单 4代表普通消息 //先给所有人发送通知，说我上线了 Map<String,Object> map1 = Maps.newHashMap(); map1.put("messageType",1); map1.put("username",username); sendMessageAll(JSON.toJSONString(map1),username); //把自己的信息加入到map当中去 clients.put(username, this); //给自己发一条消息：告诉自己现在都有谁在线 Map<String,Object> map2 = Maps.newHashMap(); map2.put("messageType",3); //移除掉自己 Set<String> set = clients.keySet(); map2.put("onlineUsers",set); sendMessageTo(JSON.toJSONString(map2),username); } catch (IOException e){ logger.info(username+"上线的时候通知所有人发生了错误"); } } @OnError public void onError(Session session, Throwable error) { logger.info("服务端发生了错误"+error.getMessage()); //error.printStackTrace(); } /** * 连接关闭 */ @OnClose public void onClose() { onlineNumber--; //webSockets.remove(this); clients.remove(username); try { //messageType 1代表上线 2代表下线 3代表在线名单 4代表普通消息 Map<String,Object> map1 = Maps.newHashMap(); map1.put("messageType",2); map1.put("onlineUsers",clients.keySet()); map1.put("username",username); sendMessageAll(JSON.toJSONString(map1),username); } catch (IOException e){ logger.info(username+"下线的时候通知所有人发生了错误"); } logger.info("有连接关闭！ 当前在线人数" + onlineNumber); } /** * 收到客户端的消息 * * @param message 消息 * @param session 会话 */ @OnMessage public void onMessage(String message, Session session) { try { logger.info("来自客户端消息：" + message+"客户端的id是："+session.getId()); System.out.println("------------ :"+message); JSONObject jsonObject = JSON.parseObject(message); String textMessage = jsonObject.getString("message"); String fromusername = jsonObject.getString("username"); String tousername = jsonObject.getString("to"); //如果不是发给所有，那么就发给某一个人 //messageType 1代表上线 2代表下线 3代表在线名单 4代表普通消息 Map<String,Object> map1 = Maps.newHashMap(); map1.put("messageType",4); map1.put("textMessage",textMessage); map1.put("fromusername",fromusername); if(tousername.equals("All")){ map1.put("tousername","所有人"); sendMessageAll(JSON.toJSONString(map1),fromusername); } else{ map1.put("tousername",tousername); sendMessageTo(JSON.toJSONString(map1),tousername); } } catch (Exception e){ e.printStackTrace(); logger.info("发生了错误了"); } } public void sendMessageTo(String message, String ToUserName) throws IOException { for (WebSocket item : clients.values()) { // System.out.println("在线人员名单 ："+item.username.toString()); if (item.username.equals(ToUserName) ) { item.session.getAsyncRemote().sendText(message); break; } } } public void sendMessageAll(String message,String FromUserName) throws IOException { for (WebSocket item : clients.values()) { item.session.getAsyncRemote().sendText(message); } } public static synchronized int getOnlineCount() { return onlineNumber; } }