1、引入包
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-websocket</artifactId>
</dependency>
2、添加配置文件
package com.ruoyi.common.config;
import org.springframework.boot.web.servlet.ServletContextInitializer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.socket.server.standard.ServerEndpointExporter;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
@Configuration
public class WebSocketConfig implements ServletContextInitializer {
/**
* 这个bean的注册,用于扫描带有@ServerEndpoint的注解成为websocket,如果你使用外置的tomcat就不需要该配置文件
*/
@Bean
public ServerEndpointExporter serverEndpointExporter() {
return new ServerEndpointExporter();
}
@Override
public void onStartup(ServletContext servletContext) throws ServletException {
}
}
3、配置入口
package com.ruoyi.web.controller.api;
import com.alibaba.fastjson.JSONObject;
import lombok.extern.slf4j.Slf4j;
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.concurrent.ConcurrentHashMap;
import java.util.concurrent.CopyOnWriteArraySet;
@ServerEndpoint("/api/webSocketSever/{userId}")
@Component
@Slf4j
public class WebSocketSever {
// 与某个客户端的连接会话,需要通过它来给客户端发送数据
private Session session;
// session集合,存放对应的session
private static ConcurrentHashMap<Integer, Session> sessionPool = new ConcurrentHashMap<>();
// concurrent包的线程安全Set,用来存放每个客户端对应的WebSocket对象。
private static CopyOnWriteArraySet<WebSocketSever> webSocketSet = new CopyOnWriteArraySet<>();
/**
* 建立WebSocket连接
*
* @param session
* @param userId 用户ID
*/
@OnOpen
public void onOpen(Session session, @PathParam(value = "userId") Integer userId) {
log.info("WebSocket建立连接中,连接用户ID:{}", userId);
try {
Session historySession = sessionPool.get(userId);
// historySession不为空,说明已经有人登陆账号,应该删除登陆的WebSocket对象
if (historySession != null) {
webSocketSet.remove(historySession);
historySession.close();
}
} catch (IOException e) {
log.error("重复登录异常,错误信息:" + e.getMessage(), e);
}
// 建立连接
this.session = session;
webSocketSet.add(this);
sessionPool.put(userId, session);
log.info("建立连接完成,当前在线人数为:{}", webSocketSet.size());
}
/**
* 发生错误
*
* @param throwable e
*/
@OnError
public void onError(Throwable throwable) {
throwable.printStackTrace();
}
/**
* 连接关闭
*/
@OnClose
public void onClose() {
webSocketSet.remove(this);
log.info("连接断开,当前在线人数为:{}", webSocketSet.size());
}
/**
* 接收客户端消息
*
* @param message 接收的消息
*/
@OnMessage
public void onMessage(String message) {
JSONObject jsonObject = JSONObject.parseObject(message);
Integer to = jsonObject.getInteger("to");
String message1 = jsonObject.getString("message");
sendMessageByUser(to,message1);
log.info("收到客户端发来的消息:{}", message);
}
/**
* 推送消息到指定用户
*
* @param userId 用户ID
* @param message 发送的消息
*/
public static void sendMessageByUser(Integer userId, String message) {
log.info("用户ID:" + userId + ",推送内容:" + message);
Session session = sessionPool.get(userId);
try {
session.getBasicRemote().sendText(message);
} catch (IOException e) {
log.error("推送消息到指定用户发生错误:" + e.getMessage(), e);
}
}
/**
* 群发消息
*
* @param message 发送的消息
*/
public static void sendAllMessage(String message) {
log.info("发送消息:{}", message);
for (WebSocketSever webSocket : webSocketSet) {
try {
webSocket.session.getBasicRemote().sendText(message);
} catch (IOException e) {
log.error("群发消息发生错误:" + e.getMessage(), e);
}
}
}
}
前端进行访问测试是否能够链接成功 入口链接为 ws://127.0.0.1:7788/api/webSocketSever/1
使用postman websocket 接口进行访问,即可发现提示 链接成功! 参数 1 代表的是 当前用户的标识!
下面是一个简单的html 页面对话
对话1:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>用户1咨询</title>
<script type="text/javascript" src="https://code.jquery.com/jquery-3.7.0.min.js" ></script>
</head>
<body>
<p id="message"></p>
<form id="clientChat">
<input type="text" style="display: none;" id="userName" />
<input type="text" style="display: none;" id="targetUserName" />
<input type="text" id="sendMsg"></input>
<button type="button" onclick="send()">发送</button>
</form>
</body>
<script>
var websocket = null;
var userId = null;
//判断当前浏览器是否支持WebSocket
if('WebSocket' in window){
websocket = new WebSocket("ws://127.0.0.1:7788/api/webSocketSever/1");
} else {
alert("Don't support websocket!")
}
//连接发生错误的回调方法
websocket.onerror = function(){
alert("Connect error!");
};
//连接成功建立的回调方法
websocket.onopen = function(event){
setMessageInnerHTML("连接已建立!");
}
//接收到消息的回调方法
websocket.onmessage = function(event){
var result = event.data
//判断是否有消息
if(result != null){
setMessageInnerHTML(result);
}
// var ob = JSON.parse(result)
// //判断用户状态
// if(ob.state != undefined && ob.state != "success"){
// setMessageInnerHTML("非法连接!");
// websocket.close();
// }
// //判断是否有消息
// if(ob.msg != undefined){
// setMessageInnerHTML(ob.msg);
// }
}
//连接关闭的回调方法
websocket.onclose = function(){
setMessageInnerHTML("close");
}
//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 sendMsg = $("#sendMsg").val();
var message = {
"message":sendMsg,
"to":2
};
setMessageInnerHTML("我 :" + sendMsg)
var ss = websocket.send(JSON.stringify(message));
console.log(ss);
$("#sendMsg").val("");
}
</script>
</html>
对话2:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>用户2咨询</title>
<script type="text/javascript" src="https://code.jquery.com/jquery-3.7.0.min.js" ></script>
</head>
<body>
<p id="message"></p>
<form id="clientChat">
<input type="text" style="display: none;" id="userName" />
<input type="text" style="display: none;" id="targetUserName" />
<input type="text" id="sendMsg"></input>
<button type="button" onclick="send()">发送</button>
</form>
</body>
<script>
var websocket = null;
var userId = null;
//判断当前浏览器是否支持WebSocket
if('WebSocket' in window){
websocket = new WebSocket("ws://127.0.0.1:7788/api/webSocketSever/2");
} else {
alert("Don't support websocket!")
}
//连接发生错误的回调方法
websocket.onerror = function(){
alert("Connect error!");
};
//连接成功建立的回调方法
websocket.onopen = function(event){
setMessageInnerHTML("连接已建立!");
}
//接收到消息的回调方法
websocket.onmessage = function(event){
var result = event.data
//判断是否有消息
if(result != null){
setMessageInnerHTML(result);
}
// var ob = JSON.parse(result)
// //判断用户状态
// if(ob.state != undefined && ob.state != "success"){
// setMessageInnerHTML("非法连接!");
// websocket.close();
// }
// //判断是否有消息
// if(ob.msg != undefined){
// setMessageInnerHTML(ob.msg);
// }
}
//连接关闭的回调方法
websocket.onclose = function(){
setMessageInnerHTML("close");
}
//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 sendMsg = $("#sendMsg").val();
var message = {
"message":sendMsg,
"to":1
};
setMessageInnerHTML("我 :" + sendMsg)
var ss = websocket.send(JSON.stringify(message));
console.log(ss);
$("#sendMsg").val("");
}
</script>
</html>
以上就是 一个spring boot 整合websockte 主体实现逻辑,可以继续在其中进行增加自己的逻辑业务进行开发