SpringBoot+Vue+ElementUI实现客服聊天

因为要做一个医疗项目,考虑到患者在挂号前需要有一个在线问诊功能,所以从CSDN上找了一篇博客(大佬ID:西瓜不甜柠檬不酸)并且实现了,为了代码不丢失,在这里记录一下:
首先是后台代码:
Pom.xml:
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.5.4</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.boai</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>demo</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-websocket</artifactId>
        </dependency>

        <dependency>
            <groupId>com.squareup.retrofit2</groupId>
            <artifactId>converter-gson</artifactId>
            <version>2.6.2</version>
        </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>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>
在这里要引入一个WebSocket的启动依赖和Gson的依赖,Gson的作用是转化字符串为json,WebSocket的作用是内部封装了Http和TCP通讯协议,所以这两个架包是必须导入的


再创建一个工具类WebSocketConfig,代码如下:
package com.boai.utils;

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

/**
 * @ClassName WebSocketConfig
 * @Author 王弈程
 * @Date 2021/9/21 14:09
 **/

@Configuration
public class WebSocketConfig {
    @Bean
    public ServerEndpointExporter serverEndpointExporter() {
        return new ServerEndpointExporter();
    }
}


再创建一个实体类SocketMsg,代码如下:

package com.boai.model;

import lombok.Data;

/**
 * @ClassName SocketMsg
 * @Author 王弈程
 * @Date 2021/9/21 14:10
 **/
@Data
public class SocketMsg {

    private int type; //聊天类型0:群聊,1:单聊.
    private String fromUser;//发送者.
    private String toUser;//接受者.
    private String msg;//消息
    
}

再创一个业务层WebSocketService,代码如下:

package com.boai.service;

import com.boai.model.SocketMsg;
import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.gson.Gson;
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.HashMap;
import java.util.Map;
import java.util.concurrent.CopyOnWriteArraySet;

/**
 * @ClassName WebSocketService
 * @Author 王弈程
 * @Date 2021/9/21 14:12
 **/

@ServerEndpoint(value = "/websocket/{nickname}")
@Component
public class WebSocketService {

    private String nickname;
    private Session session;

    //用来存放每个客户端对应的MyWebSocket对象。
    private static CopyOnWriteArraySet<WebSocketService> webSocketSet = new CopyOnWriteArraySet<WebSocketService>();
    //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
    //用来记录sessionId和该session进行绑定
    private static Map<String, Session> map = new HashMap<String, Session>();

    /**
     * 连接建立成功调用的方法
     */
    @OnOpen
    public void onOpen(Session session, @PathParam("nickname") String nickname) {
        Map<String,Object> message=new HashMap<String, Object>();
        this.session = session;
        this.nickname = nickname;
        map.put(session.getId(), session);
        webSocketSet.add(this);//加入set中
        System.out.println("有新连接加入:" + nickname + ",当前在线人数为" + webSocketSet.size());
        //this.session.getAsyncRemote().sendText("恭喜" + nickname + "成功连接上WebSocket(其频道号:" + session.getId() + ")-->当前在线人数为:" + webSocketSet.size());
        message.put("type",0); //消息类型,0-连接成功,1-用户消息
        message.put("people",webSocketSet.size()); //在线人数
        message.put("name",nickname); //昵称
        message.put("aisle",session.getId()); //频道号
        this.session.getAsyncRemote().sendText(new Gson().toJson(message));
    }

    /**
     * 连接关闭调用的方法
     */
    @OnClose
    public void onClose() {
        webSocketSet.remove(this); //从set中删除
        System.out.println("有一连接关闭!当前在线人数为" + webSocketSet.size());
    }

    /**
     * 收到客户端消息后调用的方法
     * @param message 客户端发送过来的消息
     */
    @OnMessage
    public void onMessage(String message, Session session, @PathParam("nickname") String nickname) {
        System.out.println("来自客户端的消息-->" + nickname + ": " + message);

        //从客户端传过来的数据是json数据,所以这里使用jackson进行转换为SocketMsg对象,
        // 然后通过socketMsg的type进行判断是单聊还是群聊,进行相应的处理:
        ObjectMapper objectMapper = new ObjectMapper();
        SocketMsg socketMsg;

        try {
            socketMsg = objectMapper.readValue(message, SocketMsg.class);
            if (socketMsg.getType() == 1) {
                //单聊.需要找到发送者和接受者.
                socketMsg.setFromUser(session.getId());//发送者.
                Session fromSession = map.get(socketMsg.getFromUser());
                Session toSession = map.get(socketMsg.getToUser());
                //发送给接受者.
                if (toSession != null) {
                    //发送给发送者.
                    Map<String,Object> m=new HashMap<String, Object>();
                    m.put("type",1);
                    m.put("name",nickname);
                    m.put("msg",socketMsg.getMsg());
                    fromSession.getAsyncRemote().sendText(new Gson().toJson(m));
                    toSession.getAsyncRemote().sendText(new Gson().toJson(m));
                } else {
                    //发送给发送者.
                    fromSession.getAsyncRemote().sendText("系统消息:对方不在线或者您输入的频道号不对");
                }
            } else {
                //群发消息
                broadcast(nickname + ": " + socketMsg.getMsg());
            }
        } catch (JsonParseException e) {
            e.printStackTrace();
        } catch (JsonMappingException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**
     * 发生错误时调用
     */
    @OnError
    public void one rror(Session session, Throwable error) {
        System.out.println("发生错误");
        error.printStackTrace();
    }

    /**
     * 群发自定义消息
     */
    public void broadcast(String message) {
        for (WebSocketService item : webSocketSet) {
            item.session.getAsyncRemote().sendText(message);//异步发送消息.
        }
    }

}
注意:@ServerEndpoint(value = "/websocket/{nickname}")的作用是确定方位路径,在前端能通过这个路径直接访问该方法

接下来就是前段代码,前端我使用了ElementUI配合Vue进行使用,所以需要先下载一下ElementUI,并且全局引用,我这里使用的是Vue3.0

前端代码如下:

<template>
  <div>
    <el-row :gutter="20">
      <el-col :span="12" :offset="6">
        <div class="main">
          <el-row>
            <el-input
                placeholder="请输入自己的昵称"
                prefix-icon="el-icon-user-solid"
                v-model="name"
                style="width:50%"
            ></el-input>
            <el-button type="primary" @click="conectWebSocket()">建立连接</el-button>
            <el-button type="danger">断开连接</el-button>
          </el-row>
          <el-row>
            <el-input
                placeholder="请输入对方频道号"
                prefix-icon="el-icon-phone"
                v-model="aisle"
                style="width:40%"
            ></el-input>
          </el-row>
          <el-row>
            <el-input
                placeholder="请输入要发送的消息"
                prefix-icon="el-icon-s-promotion"
                v-model="messageValue"
                style="width:50%"
            ></el-input>
            <el-button type="primary" @click="sendMessage()">发送</el-button>
          </el-row>
          <div class="message">
            <div v-for="(value,key,index) in messageList" :key="index">
              <el-tag v-if="value.name==name" type="success" style="float:right">我:{{value.msg}}</el-tag>
              <br />
              <el-tag v-if="value.name!=name" style="float:left">{{value.name}}:{{value.msg}}</el-tag>
              <br />
            </div>
          </div>
        </div>
      </el-col>
    </el-row>
  </div>
</template>

<script>
export default {
  data() {
    return {
      name: "", // 昵称
      websocket: null, // WebSocket对象
      aisle: "", // 对方频道号
      messageList: [], // 消息列表
      messageValue: "" // 消息内容
    };
  },
  methods: {
    conectWebSocket: function() {
      console.log("建立连接");
      if (this.name === "") {
        this.$alert("请输入自己的昵称", "提示", {
          confirmButtonText: "确定",
          callback: action => {}
        });
      } else {
        //判断当前浏览器是否支持WebSocket
        if ("WebSocket" in window) {
          this.websocket = new WebSocket(
              "ws://localhost:8080/websocket/" + this.name
          );
        } else {
          alert("不支持建立socket连接");
        }
        //连接发生错误的回调方法
        this.websocket.onerror = function() {

        };
        //连接成功建立的回调方法
        this.websocket.onopen = function(event) {

        };
        //接收到消息的回调方法
        var that = this;
        this.websocket.onmessage = function(event) {
          var object = eval("(" + event.data + ")");
          console.log(object);
          if (object.type == 0) {
            // 提示连接成功
            console.log("连接成功");
            that.showInfo(object.people, object.aisle);
          }
          if (object.type == 1) {
            //显示消息
            console.log("接受消息");
            that.messageList.push(object);
          }
        };
        //连接关闭的回调方法
        this.websocket.onclose = function() {};
        //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() {
          this.websocket.close();
        };
      }
    },
    // 发送消息
    sendMessage: function() {
      var socketMsg = { msg: this.messageValue, toUser: this.aisle };
      if (this.aisle == "") {
        //群聊.
        socketMsg.type = 0;
      } else {
        //单聊.
        socketMsg.type = 1;
      }
      this.websocket.send(JSON.stringify(socketMsg));
    },
    showInfo: function(people, aisle) {
      this.$notify({
        title: "当前在线人数:" + people,
        message: "您的频道号:" + aisle,
        duration: 0
      });
    }
  }
};
</script>

<style scoped>
.main {
  position: relative;
  top: 20px;
}
.message {
  position: relative;
  overflow:auto;
  top: 20px;
  width: 100%;
  height: 400px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.12), 0 0 6px rgba(0, 0, 0, 0.04);
  padding: 5px;
}
</style>

注意: this.websocket = new WebSocket("ws://localhost:8080/websocket/" + this.name);
       以后端口有所更改,直接把8080改为你的端口即可
下面我来演示一下流程


SpringBoot+Vue+ElementUI实现客服聊天

首先打开两个页面,一个模拟为患者,另一个则是医生,输入完成后,点击连接,则生成了自己的频道号

SpringBoot+Vue+ElementUI实现客服聊天

SpringBoot+Vue+ElementUI实现客服聊天 

分别输入对方的频道号,然后输入你想输入的内容,即可模仿在线聊天,但要注意的是,必须在同一个局域网内

 SpringBoot+Vue+ElementUI实现客服聊天

SpringBoot+Vue+ElementUI实现客服聊天

 

 

上一篇:MyBatis-Plus报错Parameter ‘xxx‘ not found. Available parameters are [user, param1]解决办法


下一篇:SpringBoot上传大型视频文件到服务器,解决方案