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使用WebSocket+SpringBoot+Vue搭建简易网页聊天室的实现代码

2023-03-21 11:39:13 作者：WSKH0929

这篇文章主要介绍了使用WebSocket+SpringBoot+Vue搭建简易网页聊天室的实现,具体的步骤如下,需要的朋友可以参考下

一、数据库搭建

很简单的一个user表，加两个用户admin和wskh

二、后端搭建

2.1 引入关键依赖

<dependency>            
    <groupId>org.springframework.boot</groupId>            
    <artifactId>spring-boot-starter-websocket</artifactId>       
</dependency>

2.2 WebSocket配置类

WebSocketConfig的作用是：开启WebSocket监听

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.socket.server.standard.ServerEndpointExporter;

/** 
* @Author：WSKH 
* @ClassName：WebSocketConfig 
* @ClassType：配置类 
* @Description：WebSocket配置类 
* @Date：2022/1/25/12:21 
* @Email：1187560563@qq.com 
* @Blog：https://blog.csdn.net/weixin_51545953?type=blog 
*/

@Configuration
public class WebSocketConfig {
    /** * 开启webSocket * @return */ 
    @Bean 
    public ServerEndpointExporter serverEndpointExporter() {
        return new ServerEndpointExporter(); 
    }
}

WebSocketServer里写了一些事件，如发送消息事件，建立连接事件，关闭连接事件等

import com.wskh.chatroom.util.FastJsonUtils;
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.EOFException;
import java.io.IOException;
import java.util.concurrent.ConcurrentHashMap;

@ServerEndpoint("/websocket/{sid}")
@Component
public class WebSocketServer {
    private static final Logger log = LoggerFactory.getLogger(WebSocketServer.class);

    private static int onlineCount = 0;

    private static ConcurrentHashMap<String,WebSocketServer> webSocketServerMap = new ConcurrentHashMap<>();

    private Session session;

    private String sid;


    @OnOpen
    public void onOpen(Session session, @PathParam("sid") String sid) {
        this.sid = sid;
        this.session = session;
        webSocketServerMap.put(sid, this);
        addOnlineCount();
        log.info("有新窗口开始监听:"+sid+",当前在线人数为" + getOnlineCount());
        try {
            sendInfo("openSuccess:"+webSocketServerMap.keySet());
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    @OnClose
    public void onClose() {
        webSocketServerMap.remove(sid);
        subOnlineCount();
        log.info("有一连接关闭！当前在线人数为" + getOnlineCount());
        try {
            sendInfo("openSuccess:"+webSocketServerMap.keySet());
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    @OnMessage
    public void onMessage(String message) throws IOException {
        if("ping".equals(message)) {
            sendInfo(sid, "pong");
        }
        if(message.contains(":")) {
            String[] split = message.split(":");
            sendInfo(split[0], "receivedMessage:"+sid+":"+split[1]);
        }
    }

    @OnError
    public void onError(Session session, Throwable error) {
        if(error instanceof EOFException) {
            return;
        }
        if(error instanceof IOException && error.getMessage().contains("已建立的连接")) {
            return;
        }
        log.error("发生错误", error);
    }

    /**
     * 实现服务器主动推送
     */
    public void sendMessage(String message) throws IOException {
        synchronized (session) {
            this.session.getBasicRemote().sendText(message);
        }
    }

    public static void sendObject(Object obj) throws IOException {
        sendInfo(FastJsonUtils.convertObjectToJSON(obj));
    }

    public static void sendInfo(String sid,String message) throws IOException {
        WebSocketServer socketServer = webSocketServerMap.get(sid);
        if(socketServer != null) {
            socketServer.sendMessage(message);
        }
    }

    public static void sendInfo(String message) throws IOException {
        for(String sid : webSocketServerMap.keySet()) {
            webSocketServerMap.get(sid).sendMessage(message);
        }
    }

    public static void sendInfoByUserId(Long userId,Object message) throws IOException {
        for(String sid : webSocketServerMap.keySet()) {
            String[] sids =  sid.split("id");
            if(sids.length == 2) {
                String id = sids[1];
                if(userId.equals(Long.parseLong(id))) {
                    webSocketServerMap.get(sid).sendMessage(FastJsonUtils.convertObjectToJSON(message));
                }
            }
        }
    }

    public static Session getWebSocketSession(String sid) {
        if(webSocketServerMap.containsKey(sid)) {
            return webSocketServerMap.get(sid).session;
        }
        return null;
    }

    public static synchronized void addOnlineCount() {
        onlineCount++;
    }

    public static synchronized void subOnlineCount() {
        onlineCount--;
    }

    public static synchronized int getOnlineCount() {
        return onlineCount;
    }
}

2.3 配置跨域

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

@Configuration
public class WebMvcConfig extends WebMvcConfigurerAdapter {

    @Override
    // 跨域配置
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/**")
                .allowedOrigins("*")
                .allowedMethods("POST", "GET", "PUT", "OPTIONS", "DELETE")
                .maxAge(3600)
                .allowCredentials(true);
    }

}

2.4 发送消息的控制类

/**
 * @Author：WSKH
 * @ClassName：MsgController
 * @ClassType：控制类
 * @Description：信息控制类
 * @Date：2022/1/25/12:47
 * @Email：1187560563@qq.com
 * @Blog：https://blog.csdn.net/weixin_51545953?type=blog
 */
@ApiModel("信息控制类")
@RestController
@RequestMapping("/chatroom/msg")
public class MsgController {
    @ApiOperation("发送信息方法")
    @PostMapping("/sendMsg")
    public R sendMsg(String msg) throws IOException {
        WebSocketServer.sendInfo(msg);
        return R.ok().message("发送成功");
    }
}

至此，后端部分大体配置完毕。

三、前端搭建

本文使用vue-admin-template-master模板进行聊天室的前端搭建

3.1 自定义文件websocket.js

将下面文件放在api文件夹下

//websocket.js
import Vue from 'vue'

// 1、用于保存WebSocket 实例对象
export const WebSocketHandle = undefined

// 2、外部根据具体登录地址实例化WebSocket 然后回传保存WebSocket
export const WebsocketINI = function(websocketinstance) {
  this.WebSocketHandle = websocketinstance
  this.WebSocketHandle.onmessage = OnMessage
}

// 3、为实例化的WebSocket绑定消息接收事件：同时用于回调外部各个vue页面绑定的消息事件
// 主要使用WebSocket.WebSocketOnMsgEvent_CallBack才能访问  this.WebSocketOnMsgEvent_CallBack 无法访问很诡异
const OnMessage = function(msg) {
  // 1、消息打印
  // console.log('收到消息：', msg)

  // 2、如果外部回调函数未绑定 结束操作
  if (!WebSocket.WebSocketOnMsgEvent_CallBack) {
    console.log(WebSocket.WebSocketOnMsgEvent_CallBack)
    return
  }

  // 3、调用外部函数
  WebSocket.WebSocketOnMsgEvent_CallBack(msg)
}

// 4、全局存放外部页面绑定onmessage消息回调函数:注意使用的是var
export const WebSocketOnMsgEvent_CallBack = undefined

// 5、外部通过此绑定方法 来传入的onmessage消息回调函数
export const WebSocketBandMsgReceivedEvent = function(receiveevent) {
  WebSocket.WebSocketOnMsgEvent_CallBack = receiveevent
}

// 6、封装一个直接发送消息的方法：
export const Send = function(msg) {
  if (!this.WebSocketHandle || this.WebSocketHandle.readyState !== 1) {
    // 未创建连接 或者连接断开 无法发送消息
    return
  }
  this.WebSocketHandle.send(msg)// 发送消息
}

// 7、导出配置
const WebSocket = {
  WebSocketHandle,
  WebsocketINI,
  WebSocketBandMsgReceivedEvent,
  Send,
  WebSocketOnMsgEvent_CallBack
}

// 8、全局绑定WebSocket
Vue.prototype.$WebSocket = WebSocket

3.2 main.js中全局引入websocket

import '@/utils/websocket' // 全局引入 WebSocket 通讯组件

3.3 App.vue中声明websocket对象

App.vue

<template>
  <div id="app">
    <router-view />
  </div>
</template>

<script>
  import {getInfo} from './api/login.js';
  import {getToken} from './utils/auth.js'
  export default {
    name: 'App',
    mounted() {
      // 每3秒检测一次websocket连接状态 未连接 则尝试连接 尽量保证网站启动的时候 WebSocket都能正常长连接
      setInterval(this.WebSocket_StatusCheck, 3000)
      // 绑定消息回调事件
      this.$WebSocket.WebSocketBandMsgReceivedEvent(this.WebSocket_OnMesage)
      // 初始化当前用户信息
      this.token = getToken()
      getInfo(this.token).then((rep)=>{
        console.log(rep)
        this.userName = rep.data.name
      }).catch((error)=>{
        console.log(error)
      })
    },
    data(){
      return{

      }
    },
    methods: {

      // 实际消息回调事件
      WebSocket_OnMesage(msg) {
        console.log('收到服务器消息：', msg.data)
        console.log(msg)
        let chatDiv = document.getElementById("chatDiv")
        let newH3 = document.createElement("div")
        if(msg.data.indexOf('openSuccess')>=0){
			// 忽略连接成功消息提示
        }else{
          if(msg.data.indexOf(this.userName)==0){
            // 说明是自己发的消息，应该靠右边悬浮
            newH3.innerHTML = "<div style='width:100%;text-align: right;'><h3 style=''>"+msg.data+"</h3></div>"
          }else{
            newH3.innerHTML = "<div style='width:100%;text-align: left;'><h3 style=''>"+msg.data+"</h3></div>"
          }
        }
        chatDiv.appendChild(newH3)
      },

      // 1、WebSocket连接状态检测：
      WebSocket_StatusCheck() {
        if (!this.$WebSocket.WebSocketHandle || this.$WebSocket.WebSocketHandle.readyState !== 1) {
          console.log('Websocket连接中断，尝试重新连接:')
          this.WebSocketINI()
        }
      },

      // 2、WebSocket初始化：
      async WebSocketINI() {
        // 1、浏览器是否支持WebSocket检测
        if (!('WebSocket' in window)) {
          console.log('您的浏览器不支持WebSocket!')
          return
        }

        let DEFAULT_URL = "ws://" + '127.0.0.1:8002' + '/websocket/' + new Date().getTime()

        // 3、创建Websocket连接
        const tmpWebsocket = new WebSocket(DEFAULT_URL)

        // 4、全局保存WebSocket操作句柄：main.js 全局引用
        this.$WebSocket.WebsocketINI(tmpWebsocket)

        // 5、WebSocket连接成功提示
        tmpWebsocket.onopen = function(e) {
          console.log('webcoket连接成功')
        }

        //6、连接失败提示
        tmpWebsocket.onclose = function(e) {
          console.log('webcoket连接关闭：', e)
        }
      }

    }
  }
</script>

3.4 聊天室界面.vue

<template>
  <div>
    <div style="margin-top: 1vh;margin-bottom: 1vh;font-weight: bold;">聊天内容:</div>
    <div style="background-color: #c8c8c8;width: 100%;height: 80vh;" id="chatDiv">

    </div>
    <div style="margin-top: 1vh;margin-bottom: 1vh;font-weight: bold;">聊天输入框:</div>
    <el-input v-model="text">

    </el-input>
    <el-button @click="sendMsg">点击发送</el-button>
  </div>
</template>

<script>
  import {getInfo} from '../../api/login.js';
  import {getToken} from '../../utils/auth.js'
  import msgApi from '../../api/msg.js'
  export default {
    mounted() {
      //
      this.token = getToken()
      getInfo(this.token).then((rep)=>{
        console.log(rep)
        this.userName = rep.data.name
      }).catch((error)=>{
        console.log(error)
      })
    },
    data() {
      return {
        text: "",
        token:"",
        userName:"",
      }
    },
    methods: {
      sendMsg(){
        let msg = this.userName+"："+this.text
        msgApi.sendMsg(msg).then((rep)=>{

        }).catch((error)=>{

        })
        this.text = ""
      }
    }
  }
</script>

<style scoped="true">
  .selfMsg{
    float: right;
  }
</style>

3.5 最终效果

用两个不同的浏览器，分别登录admin账号和wskh账号进行聊天测试，效果如下（左边为admin）：

到此这篇关于使用WebSocket+SpringBoot+Vue搭建简易网页聊天室的实现代码的文章就介绍到这了,更多相关WebSocket+SpringBoot+Vue 搭建网页聊天室内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家！