WebSocket实现群聊功能、房间隔离

• 引用WebSocket相关依赖

 		<dependency><groupId>javax.websocket</groupId><artifactId>javax.websocket-api</artifactId><version>1.1</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-websocket</artifactId><version>4.3.30.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-messaging</artifactId><version>4.3.30.RELEASE</version></dependency>

• 后端代码实现，很简单分为消息封装和消息处理

package com.risen.brain.websocket;import com.alibaba.fastjson.JSONObject;
import com.risen.brain.websocket.entity.Message;
import com.risen.brain.websocket.entity.MessageData;
import org.springframework.stereotype.Component;import javax.websocket.*;
import javax.websocket.server.PathParam;
import javax.websocket.server.ServerEndpoint;
import java.util.*;
import java.util.concurrent.ConcurrentHashMap;/*** @author Administrator*/
@ServerEndpoint("/public/xzdnTaskSocket/{platform}/{groupId}/{selfId}")
@Component
public class MessageWebSocket {private static Map<String, MessageWebSocket> userMap = new ConcurrentHashMap<>();private static Map<String, Set<MessageWebSocket>> roomMap = new ConcurrentHashMap<>();private Session session;private String selfId;//建立连接成功调用@OnOpenpublic void onOpen(Session session, @PathParam(value = "platform") String platform, @PathParam(value = "groupId") String groupId, @PathParam(value = "selfId") String selfId) {this.session = session;this.selfId = selfId;userMap.put(selfId, this);if (!roomMap.containsKey(groupId)) {Set<MessageWebSocket> set = new HashSet<>();set.add(userMap.get(selfId));roomMap.put(groupId, set);} else {roomMap.get(groupId).add(this);}MessageData messageData = new MessageData();messageData.setSelfId(selfId);messageData.setGroupId(groupId);messageData.setPlatform(platform);messageData.setType("meta");messageData.setDetailType("online");System.out.println(selfId + "加入了群聊!");Message dataMessage = new Message(selfId + "加入了群聊!");messageData.setMessages(Arrays.asList(dataMessage));sendMessageTo(messageData, groupId, selfId);}//关闭连接时调用@OnClosepublic void onClose(@PathParam(value = "selfId") String selfId, @PathParam("groupId") String groupId) {if (roomMap.containsKey(groupId)) {Set<MessageWebSocket> set = roomMap.get(groupId);for (MessageWebSocket item : set) {if (item.selfId.equals(selfId)) {set.remove(item);}}}}//收到客户端信息@OnMessagepublic void onMessage(String message, @PathParam(value = "platform") String platform, @PathParam(value = "selfId") String selfId, @PathParam("groupId") String groupId) {MessageData messageData = new MessageData();List<Message> objects = new ArrayList<>();Message mg = new Message();mg.setData(message);mg.setType("text");objects.add(mg);messageData.setMessages(objects);messageData.setPlatform(platform);sendMessageTo(messageData, groupId, selfId);//根据bean名称获取对象，可以对消息进行记录//IXzdnInvestigateCityService xzdnInvestigateCityService1 = SpringUtil.getBean("xzdnInvestigateCityService");//XzdnInvestigateCity city = new XzdnInvestigateCity();//List<Map> groupCityCount = xzdnInvestigateCityService1.findGroupCityCount(city);System.out.println("2222");/*TableDynaModel tableDynaModel = tableDynaDao.newDynaModel("xzdn_task_message_info");tableDynaModel.set("xzdnMessageId", messageData.getId());tableDynaModel.set("xzdnMessagePlatform", messageData.getPlatform());tableDynaModel.set("xzdnMessageSelfid", messageData.getSelfId());tableDynaModel.set("xzdnMessageSelfname", messageData.getSelfName());tableDynaModel.set("xzdnMessageSelfdeptid", messageData.getSelfDeptId());tableDynaModel.set("xzdnMessageSelfdeptname", messageData.getSelfDeptName());tableDynaModel.set("xzdnMessageTime", messageData.getTime());tableDynaModel.set("xzdnMessageType", messageData.getType());tableDynaModel.set("xzdnMessageDetailtype", messageData.getDetailType());tableDynaModel.set("xzdnMessageMessagetype", messageData.getMessageType());tableDynaModel.set("xzdnMessageGroupid", messageData.getGroupId());tableDynaModel.set("xzdnMessageMessages", JSONObject.toJSONString(messageData.getMessages()));tableDynaDao.save(tableDynaModel);*/}//错误时调用@OnErrorpublic void onError(Session session, Throwable throwable) {System.out.println("发生错误");throwable.printStackTrace();}/*** 群聊** @param message 消息* @param groupId 房间号* @param selfId  发送人*/public static void sendMessageTo(MessageData message, String groupId, String selfId) {message.setGroupId(groupId);message.setSelfId(selfId);if (roomMap.containsKey(groupId)) {for (MessageWebSocket item : roomMap.get(groupId)) {//if (!item.selfId.equals(selfId)) {item.session.getAsyncRemote().sendText(JSONObject.toJSONString(message));// }}}}/*** 私聊** @param message  消息* @param toSelfId 接收人*/public void sendUserTo(String message, String toSelfId) {if (userMap.containsKey(toSelfId)) {userMap.get(toSelfId).session.getAsyncRemote().sendText(message);}}
}

• 消息封装，里面包含房间信息，用户信息、消息

package com.risen.brain.websocket.entity;import lombok.Data;@Data
public class Message {/*** 消息类型 text,json,image,audio,video,file,markdown,btn*/private String type;/*** 内容 媒体类容均为文件id/url/详情json*/private String data;public Message() {}public Message(String data) {this.data = data;this.type = "text";}
}package com.risen.brain.websocket.entity;import com.risen.brain.utils.SequenceUtils;
import lombok.Data;import java.math.BigInteger;
import java.time.LocalDateTime;
import java.time.ZoneOffset;
import java.util.List;/*** Created with IntelliJ IDEA.*  * @Author: yxz* @Date: 2021/10/18/10:21* @Description:*/
@Data
public class MessageData {/*** 事件唯一标识符*/private BigInteger id;/*** 实现平台名称,协议名称 web,dd*/private String platform;/*** 消息发送人 id*/private String selfId;/*** 消息发送人*/private String selfName;/*** 消息发送人部门id*/private String selfDeptId;/*** 消息发送人部门*/private String selfDeptName;/*** 事件发生时间（Unix 时间戳），单位：秒*/private Long time;/*** 事件类型，必须是 meta、message、notice、request 中的一个，分别表示元事件、消息事件、通知事件和请求事件*/private String type;/*** 事件详细类型* meta: online,heartbeat 分别表示 首次连接，心跳包* message:* notice: remove 删除通知* request:*/private String detailType;/*** 消息类型 1：群消息*/private String messageType;/*** 群消息时的群id*/private String groupId;/*** 消息段*/private List<Message> messages;public MessageData() {this.id = SequenceUtils.nextId();this.time = LocalDateTime.now().toInstant(ZoneOffset.ofHours(8)).toEpochMilli();}
}

• 前端代码实现，本人不是专业前端，网上随便找个了页面做交互

<!DOCTYPE HTML>
<html><head><meta charset="UTF-8"><title>My WebSocket</title><style>#message {margin-top: 40px;border: 1px solid gray;padding: 20px;}</style>
</head><body>
<button onclick="conectWebSocket()">连接WebSocket</button>
<button onclick="closeWebSocket()">断开连接</button>
<hr />
<br />
消息：<input id="text" type="text" />
<button onclick="send()">发送消息</button>
<div id="message"></div>
</body>
<script type="text/javascript">//获取地址栏参数，key:参数名称const urlParams = new URLSearchParams(window.location.search);//发信息用户const user = urlParams.get('user');//房间名称const type = urlParams.get('group');var websocket = null;function conectWebSocket() {//判断当前浏览器是否支持WebSocketif ('WebSocket' in window) {websocket = new WebSocket("ws://localhost:8081/xzdn/public/xzdnTaskSocket/web/"+type+"/"+user);} 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("tips: 连接成功！");}//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("tips: 关闭连接");}//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,"web",user,type);}</script></html>

• 最终效果

超人发送信息：房间号：加班放假

王亮在房间“加班放假”中，收到了超人信息，并进行回答

四环单独在“吃喝玩乐”房间并没有收到房间“加班放假”中的消息