SpringBoot集成WebSocket
大约 7 分钟
SpringBoot集成WebSocket
聊天室展示

导入依赖
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.sixkey</groupId>
<artifactId>websocket</artifactId>
<version>1.0-SNAPSHOT</version>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.7.12</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!--websocket依赖-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-websocket</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>2.0.21</version>
</dependency>
</dependencies>
<build>
<plugins>
<!-- maven打包插件 -> 将整个工程打成一个 fatjar -->
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<!-- 作用:项目打成jar,同时把本地jar包也引入进去 -->
<configuration>
<includeSystemScope>true</includeSystemScope>
</configuration>
</plugin>
<!--添加配置跳过测试-->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.1</version>
<configuration>
<skipTests>true</skipTests>
</configuration>
</plugin>
</plugins>
<!-- 固定Jar包名字 -->
<finalName>websocket</finalName>
</build>
</project>
1、配置类
@Configuration
public class WebSocketConfig {
@Bean
public ServerEndpointExporter serverEndpointExporter(){
return new ServerEndpointExporter();
}
}
2、websocket调用接口方法
//注册成组件
@Component
//定义websocket服务器端,它的功能主要是将目前的类定义成一个websocket服务器端。注解的值将被用于监听用户连接的终端访问URL地址
//前端访问路径:ws://localhost:8089/websocket/tom
@ServerEndpoint("/websocket/{username}")
@Slf4j
public class WebSocket {
//实例一个session,这个session是websocket的session
private Session session;
//存放当前用户名
private String userName;
//存放需要接受消息的用户名
private String toUserName;
//存放在线的用户数量
private static Integer userNumber = 0;
//存放websocket的集合,保证用户不重复
private static CopyOnWriteArraySet<WebSocket> webSocketSet = new CopyOnWriteArraySet<>();
//前端请求一个websocket时
//接收前端上线请求
@OnOpen
public void onOpen(Session session,@PathParam("username") String username) throws IOException {
this.session = session;
//将当前对象放入webSocketSet
webSocketSet.add(this);
//增加在线人数
userNumber++;
//保存当前用户名
this.userName = username;
//获得所有的用户
Set<String> userLists = new TreeSet<>();
for (WebSocket webSocket : webSocketSet) {
userLists.add(webSocket.userName);
}
//将所有信息包装好传到客户端(给所有用户)
Map<String, Object> map1 = new HashMap();
// 把所有用户列表
map1.put("onlineUsers", userLists);
//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
map1.put("messageType", 1);
// 返回用户名
map1.put("username", username);
// 返回在线人数
map1.put("number", this.userNumber);
//发送给所有用户谁上线了,并让他们更新自己的用户菜单
sendMessageAll(JSON.toJSONString(map1),this.userName);
log.info("【websocket消息】有新的连接, 总数:{}", this.userNumber);
// 更新在线人数(给所有人)
Map<String, Object> map2 = new HashMap();
//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
map2.put("messageType", 3);
//把所有用户放入map2
map2.put("onlineUsers", userLists);
//返回在线人数
map2.put("number", this.userNumber);
// 消息发送指定人(所有的在线用户信息)
sendMessageAll(JSON.toJSONString(map2),this.userName);
}
//前端关闭时一个websocket时
@OnClose
public void onClose() throws IOException {
//从集合中移除当前对象
webSocketSet.remove(this);
//在线用户数减少
userNumber--;
//通知下线
Map<String, Object> map1 = new HashMap();
//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
map1.put("messageType", 2);
//所有在线用户
map1.put("onlineUsers", this.webSocketSet);
//下线用户的用户名
map1.put("username", this.userName);
//返回在线人数
map1.put("number", userNumber);
//发送信息,所有人,通知谁下线了
sendMessageAll(JSON.toJSONString(map1),this.userName);
//通知修改用户列表
// 更新在线人数(给所有人)
Map<String, Object> map2 = new HashMap();
//获得所有的用户
Set<String> userLists = new TreeSet<>();
for (WebSocket webSocket : webSocketSet) {
userLists.add(webSocket.userName);
}
//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
map2.put("messageType", 3);
//把所有用户放入map2
map2.put("onlineUsers", userLists);
//返回在线人数
map2.put("number", this.userNumber);
// 消息发送指定人(所有的在线用户信息)
sendMessageAll(JSON.toJSONString(map2),this.userName);
log.info("【websocket消息】连接断开, 总数:{}", webSocketSet.size());
}
//前端向后端发送消息
//后端接收前端发送过来的消息
@OnMessage
public void onMessage(String message) throws IOException {
log.info("【websocket消息】收到客户端发来的消息:{}", message);
//将前端传来的数据进行转型
com.alibaba.fastjson.JSONObject jsonObject = JSON.parseObject(message);
//获取所有数据
String textMessage = jsonObject.getString("message");
String username = jsonObject.getString("username");
String type = jsonObject.getString("type");
String tousername = jsonObject.getString("tousername");
//群发
if(type.equals("群发")){
Map<String, Object> map3 = new HashMap();
map3.put("messageType", 4);
//所有在线用户
map3.put("onlineUsers", this.webSocketSet);
//发送消息的用户名
map3.put("username", username);
//返回在线人数
map3.put("number", userNumber);
//发送的消息
map3.put("textMessage", textMessage);
//发送信息,所有人,通知谁下线了
sendMessageAll(JSON.toJSONString(map3),this.userName);
}
//私发
else{
//发送给对应的私聊用户
Map<String, Object> map3 = new HashMap();
map3.put("messageType", 4);
//所有在线用户
map3.put("onlineUsers", this.webSocketSet);
//发送消息的用户名
map3.put("username", username);
//返回在线人数
map3.put("number", userNumber);
//发送的消息
map3.put("textMessage", textMessage);
//发送信息,所有人,通知谁下线了
sendMessageTo(JSON.toJSONString(map3),tousername);
//发送给自己
Map<String, Object> map4 = new HashMap();
map4.put("messageType", 4);
//所有在线用户
map4.put("onlineUsers", this.webSocketSet);
//发送消息的用户名
map4.put("username", username);
//返回在线人数
map4.put("number", userNumber);
//发送的消息
map4.put("textMessage", textMessage);
//发送信息,所有人,通知谁下线了
sendMessageTo(JSON.toJSONString(map3),username);
}
}
/**
* 消息发送所有人
*/
public void sendMessageAll(String message, String FromUserName) throws IOException {
for (WebSocket webSocket: webSocketSet) {
//消息发送所有人(同步)getAsyncRemote
webSocket.session.getBasicRemote().sendText(message);
}
}
/**
* 消息发送指定人
*/
public void sendMessageTo(String message, String ToUserName) throws IOException {
//遍历所有用户
for (WebSocket webSocket : webSocketSet) {
if (webSocket.userName.equals(ToUserName)) {
//消息发送指定人
webSocket.session.getBasicRemote().sendText(message);
log.info("【发送消息】:", this.userName+"向"+ToUserName+"发送消息:"+message);
break;
}
}
}
}
3、启动类
@SpringBootApplication
public class WebSocketApplication {
public static void main(String[] args) {
SpringApplication.run(WebSocketApplication.class,args);
}
}
4、配置文件
server:
port: 8090
5、前端页面
<!DOCTYPE HTML>
<html>
<head>
<title>聊天室</title>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
<script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>
</head>
<body style="padding-left: 200px;padding-right: 200px;margin-top: 40px;">
<div class="alert alert-primary" style="margin-bottom: -20px;text-align: center;" role="alert">聊天室</div>
<div class="jumbotron" style="height: 500px;width: 1135px;">
<!-- 用户列表 -->
<div class="jumbotron" style="height: 500px;width: 200px;float: right;background-color: green;margin-top: -65px;margin-right: -30px;">
<div class="alert alert-primary" role="alert" style="width: 200px;margin-top: -43px;margin-left: -32px;">在线用户列表:</div>
<ul class="list-group" id="userlist" style="width: 200px;margin-top: -18px;margin-left: -32px;">
</ul>
</div>
<div id="content" style="height: 500px;width: 900px;background-color: white;margin-top: -45px;margin-left: -20px;">
</div>
</div>
<div class="form-group">
<input type="text" style="width: 90%;;float: left;" class="form-control" id="message" placeholder="请输入内容">
<button type="button" style="width: 10%;float: left;" class="fasong">发送</button>
<button type="button" style="width: 10%;float: left;" class="qingping">清屏</button>
</div>
</body>
<script type="text/javascript">
//私发全局消息
var tomessage = "";
//私发用户名称
var tousername = "";
//清屏
$(".qingping").click(function(){
$("#content").html(``);
})
//生成一个随机用户名
var username = "用户"+Math.random()*100;
//定义一个websocket
var websocket = null;
//判断当前浏览器是否支持WebSocket(固定写法)
if('WebSocket' in window){
websocket = new WebSocket("ws://localhost:8090/websocket/"+username);
}else{
alert('浏览器不支持websocket')
}
//连接发生错误的回调方法
websocket.onerror = function(){
console.log("发生错误");
};
//连接成功建立的回调方法
websocket.onopen = function(event){
console.log("建立连接"+"event");
}
//接收到消息的回调方法
websocket.onmessage = function(event){
var data = JSON.parse(event.data);
console.log(JSON.parse(event.data))
//更新content的内容(上线)
if(data.messageType=="1"){
// console.log("成功")
$("#content").append(`<span style="width: 100%;height: 30px;line-height: 30px;font-size: 14px;">`+data.username+"上线了"+`</span><br>`);
}
//更新content的内容(下线)
if(data.messageType=="2"){
// console.log("成功")
$("#content").append(`<span style="width: 100%;height: 30px;line-height: 30px;font-size: 14px;">`+data.username+"下线了"+`</span><br>`);
}
//更新content的内容(更新用户列表)
if(data.messageType=="3"){
//先清空
$("#userlist").html(``);
var list = data.onlineUsers;
console.log(list)
for(var i=0;i<list.length;i++){
$("#userlist").append(`<li style="cursor:pointer;" class="list-group-item" onclick="friend(this)" values="`+list[i]+`">`+list[i]+`</li>`);
}
}
//更新content的内容(更新用户群发消息)
if(data.messageType=="4"){
// console.log(data);
$("#content").append(`<span style="width: 100%;height: 30px;line-height: 30px;font-size: 14px;">`+data.username+`说:`+data.textMessage+`</span><br>`);
}
}
//选择用户
function friend(e){
console.log(e);
$("#message").val("@ "+e.innerHTML+" ");
var data = e.innerHTML;
console.log(data);
tousername = data;
}
//连接关闭的回调方法
websocket.onclose = function(){
console.log("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(){
alert("已关闭连接");
websocket.close();
}
//发送按钮
$(".fasong").click(function(){
console.log("发送消息")
var message = $("#message").val();
//判断是群发还是私发
console.log(message);
//获取发送对象
tousername = message.split(' ')[1];
//获取发送消息
tomessage = message.split(' ')[2];
console.log(tomessage);
console.log(tousername);
if(message.indexOf("@")!=-1){
//私发
console.log("私发")
var param = {};
param['username'] = username;
param['message'] = tomessage;
param['type'] = '私发';
param['tousername'] = tousername;
}
else{
//群发
console.log("群发")
var param = {};
param['username'] = username;
param['message'] = message;
param['type'] = '群发';
param['tousername'] = '';
}
//发送消息到后端
websocket.send(JSON.stringify(param));
})
</script>
</html>