Vue+ssh framework to realize online chat

<template>
<el-container>
  <el-header>
  </el-header>
  <el-main>
    <div class="cht">
   <div v-for="(d,index) in mycontent" :key="index">
      <my :message="d.mess" :time="d.time" :bl="d.bl"></my>
      </div>
      </div>
<div class="smess">
  <el-row>
    <el-col :span="18">
<el-input type="textarea" placeholder="Please enter content" v-model="textarea" class="text"></el-input>
    </el-col>
     <el-col :span="6">
       <br>
      <el-button type="primary" round @click="mess()">Send message</el-button>
    </el-col>
  </el-row>
  </div>
  </el-main>
</el-container>
</template>
<style>
.smess{
  left: 20%;
  width:70%;
  position: absolute;
  top:70%
}
.text{
border: 1px solid #409eff;
}
.cht{
width: 55%;
height: 30%;
background-color: burlywood;
margin-left: 18%;
}
</style>
<script>
import router from "../../router/router.js";
import my from "./my";
import axios from "axios";
import Qs from "qs";
var mylogo=localStorage.getItem("logo");//Current user avatar var identity=localStorage.getItem("identity");//Current identity var name=localStorage.getItem("username");//Current username//Get a teacher's name from the previous page var teacher='';
export default {
   components:
      my
  },
  methods: {
    //Call this.websocketsend() in the method to send data to the server onConfirm() {
      //Data to be transmitted var data="Hello";
      this.websocketsend(JSON.stringify(data));
    },
//Click to send the message to the background mess(){
        var mydata=this.textarea;
         let data = {msg: mydata};
      this.websocketsend(JSON.stringify(data));
    },
    /* */
    initWebSocket() {
      // Initialize weosocket
      //Get the current username this.websock = new WebSocket(
        "ws://localhost:8080/PsychoSys/javasocket/" +name
      );
      this.websock.onmessage = this.websocketonmessage;
      this.websock.onerror = this.websocketonerror;
      this.websock.onopen = this.websocketonopen;
      this.websock.onclose = this.websocketclose;
    },
    websocketonopen() {
      // After the connection is established, execute the send method to send data let data = { code: 0, msg: "This is client: first connection" };
    },
    websocketonerror() {
      console.log("WebSocket connection failed");
    },
    websocketonmessage(e) {
      // Data receiving var s=eval('(' + e.data + ')');
  //Insert all the data into it this.mycontent.push({mess:s.msg,time:s.date,bl:s.isSelf,mylogo:mylogo});
    },
    websocketsend(Data) {
      // Data sending this.websock.send(Data)
    },
    websocketclose(e) {
      // Close console.log("Connection closed", e);
    }
  },
  created() {
    console.log("created");
    this.initWebSocket();
  },
  data() {
    return {
     websocket: null,
     textarea:'' ,
     mycontent:[],
     iden:true
     };
  },
  destroyed() {
    this.websock.close();
  }
};
</script>

<template>
<div v-if="bl" class="rborders">
  <el-row class="ms">
    <el-col :span="22">
      <el-row><span>{{message}}</span></el-row>
      <br>
       <el-row><span class="time">{{time}}</span></el-row>
  </el-col>
    <el-col :span="2" >
      <img src="mylogo" class="logo"/>
  </el-col>
    </el-row>
  </div>
  <div v-else class="lborders">
 <el-row>
  <el-col :span="2" >
      <img src="http://localhost:8080/PsychoSys/title/user.png" class="logo"/>
  </el-col>
  <br>
    <el-col :span="12">
      <el-row>
        <el-col :span="24"><span >{{message}}</span></el-col>
        </el-row>
      <br>
       <el-row><span class="time">{{time}}</span></el-row>
  </el-col>
    </el-row>
  </div>
</template>
<style>
.ms{
text-align: right;
margin-right: 0%;
}
.logo{
    width:60px;
    height: 60px;
    border-radius: 50%;
}
.time{
  font-size:14px;
}
.lborders{
  position: relative;
  margin-left:0%;
}
.rborders{
  position: relative;
  margin-right:0%;
}
</style>
<script>
export default {
   props: ['message','time','bl','mylogo'],
     data() {
        return {
     };
      },
}
</script>

package cn.com.socket;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
 
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 org.hibernate.SessionFactory;
 
import net.sf.json.JSONObject;
@ServerEndpoint("/javasocket/{uname}")
public class SocketPart {
 //Date private static final SimpleDateFormat DATE_FORMAT = new SimpleDateFormat("yyyy-MM-dd HH:mm"); 
 //Store a collection of sessions, value type is java class SocketPart
 private static Map<String,SocketPart> map=new ConcurrentHashMap<String,SocketPart>();
    private String username;
    private Session session;
 private SessionFactory sf;
 public SessionFactory getSf() {
  return sf;
 }
 public void setSf(SessionFactory sf) {
  this.sf = sf;
 }
 @OnOpen
 public void open(@PathParam("uname")String username,Session session){
  this.username=username;
  this.session=session;
  map.put(username,this);
 }
 @OnClose
 public void close(){
  map.remove(this.username);
  try {
   this.session.close();
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
  System.out.println("Close");
 }
 @OnError
 public void error(Throwable t) {
  // Add error handling operation close();
  System.out.println("Error occurred");
  
  t.printStackTrace();
 }
 @OnMessage
 public void message(String message,Session session){
  JSONObject jsonObject = JSONObject.fromObject(message);
  jsonObject.put("date", DATE_FORMAT.format(new Date()));
  //Give the current collection size to the front desk, otherwise, I don't know how to store itjsonObject.put("cusize",map.size());
 //Receive information for (String s : map.keySet()) {
   if (this.username.equals(map.get(s).username)) {
    jsonObject.put("isSelf", true);
   }else{
    jsonObject.put("isSelf", false);
   }
   map.get(s).session.getAsyncRemote().sendText(jsonObject.toString());
  }
 }
}