springboot快速搭建websocket聊天室
1、新建springboot工程,启动器只选web
2、在pom.xml导入
<!--websocket-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-websocket</artifactId>
</dependency>
<!--Json数据转换-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.70</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.google.collect/com.google.collect 工具包 -->
<dependency>
<groupId>com.google.collect</groupId>
<artifactId>com.springsource.com.google.common.collect</artifactId>
<version>0.8.0.20080820</version>
</dependency>
3、application.properties
#只配置端口8088,端口随意
server.port=8088
4、创建节点配置类WebSocketStompConfig.java
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.socket.server.standard.ServerEndpointExporter;
@Configuration
public class WebSocketStompConfig {
//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();
}
}
5、WebSocket配置类
package com.ahhc.chat_room.utils;
/**
* @author orange
* @create 2020-07-07 16:40
*/
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.CopyOnWriteArraySet;
import java.util.concurrent.atomic.AtomicInteger;
import javax.websocket.OnClose;
import javax.websocket.OnError;
import javax.websocket.OnMessage;
import javax.websocket.OnOpen;
import javax.websocket.Session;
import javax.websocket.server.PathParam;
import javax.websocket.server.ServerEndpoint;
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;
/**
* @Author:JCccc
* @Description:
* @Date: created in 15:56 2019/5/13
*/
@Component
@ServerEndpoint(value = "/connectWebSocket/{userId}")
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 userId;
/**
* 建立连接
*
* @param session
*/
@OnOpen
public void onOpen(@PathParam("userId") String userId, Session session)
{
onlineNumber++;
logger.info("现在来连接的客户id:"+session.getId()+"用户名:"+userId);
this.userId = userId;
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("userId",userId);
sendMessageAll(JSON.toJSONString(map1),userId);
//把自己的信息加入到map当中去
clients.put(userId, 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),userId);
}
catch (IOException e){
logger.info(userId+"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(userId);
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("userId",userId);
sendMessageAll(JSON.toJSONString(map1),userId);
}
catch (IOException e){
logger.info(userId+"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 fromuserId = jsonObject.getString("userId");
String touserId = 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("fromuserId",fromuserId);
if(touserId.equals("All")){
map1.put("touserId","所有人");
sendMessageAll(JSON.toJSONString(map1),fromuserId);
}
else{
map1.put("touserId",touserId);
System.out.println("开始推送消息给"+touserId);
sendMessageTo(JSON.toJSONString(map1),touserId);
}
}
catch (Exception e){
e.printStackTrace();
logger.info("发生了错误了");
}
}
public void sendMessageTo(String message, String TouserId) throws IOException {
for (WebSocket item : clients.values()) {
// System.out.println("在线人员名单 :"+item.userId.toString());
if (item.userId.equals(TouserId) ) {
item.session.getAsyncRemote().sendText(message);
break;
}
}
}
public void sendMessageAll(String message,String FromuserId) throws IOException {
for (WebSocket item : clients.values()) {
item.session.getAsyncRemote().sendText(message);
}
}
public static synchronized int getOnlineCount() {
return onlineNumber;
}
}
6、创建html页面
<!DOCTYPE HTML>
<html>
<head>
<title>Test My WebSocket</title>
</head>
<body>
TestWebSocket
<input id="text" type="text" />
<button onclick="send()">SEND MESSAGE</button>
<button onclick="closeWebSocket()">CLOSE</button>
<div id="message"></div>
</body>
<script type="text/javascript">
var websocket = null;
//判断当前浏览器是否支持WebSocket
if('WebSocket' in window){
//连接WebSocket节点
websocket = new WebSocket("ws://localhost:8083/connectWebSocket/001");
}
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("open");
}
//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("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 message = document.getElementById('text').value;
websocket.send(message);
}
</script>
</html>
7、导入页面二模拟用户2
8、测试
package com.ahhc.chat_room.controller;
import com.ahhc.chat_room.utils.WebSocket;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import java.io.IOException;
/**
* @author orange
* @create 2020-07-07 16:57
*/
@RestController
@RequestMapping("/ws")
public class WebsSocketController {
@Autowired
WebSocket webSocket;
/*单独发送根据id*/
@ResponseBody
@GetMapping("/sendTo")
public String sendTo(@RequestParam("userId") String userId,@RequestParam("msg") String msg) throws IOException {
webSocket.sendMessageTo(msg,userId);
return "推送成功";
}
/**
* 发消息给所有人
* @param msg
* @return
* @throws IOException
*/
@ResponseBody
@GetMapping("/sendAll")
public String sendAll(@RequestParam("msg") String msg) throws IOException {
String fromUserId="system";//其实没用上
webSocket.sendMessageAll(msg,fromUserId);
return "推送成功";
}
}
9、测试数据
{
"message" :" hello,我是001,我想和你做朋友",
"userId":"001",
"to":"002"
}
引自:添加链接描述