angular5+SpringBoot+Websocket

介绍

前端使用angular5框架，后端使用springboot，使用Websocket协议创建长链接

SpringBoot

Using WebSocket to build an interactive web application 这是Spring官方的文档，找这么搭建就行。

关键

注意上面代码中的几个地址

• '/gs-guide-webscoket' 用于创建长链接

• '/app/hello' 用于客户端send

• '/topic/greeting' 用于订阅，客户端send后触发，将response发个订阅的客户端

angular5

关键代码

import { Component } from '@angular/core';
import Stomp from 'stompjs';
import SockJS from 'sockjs-client';
import $ from 'jquery';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {
  private serverUrl = 'http://localhost:8080/gs-guide-webscoket'
  private title = 'WebSockets chat';
  private stompClient;

  constructor(){
    this.initializeWebSocketConnection();
  }

  initializeWebSocketConnection(){
    let ws = new SockJS(this.serverUrl);
    this.stompClient = Stomp.over(ws);
    let that = this;
    this.stompClient.connect({}, function(frame) {
      that.stompClient.subscribe("/topic/greeting", (message) => {
        if(message.body) {
          $(".chat").append("<div class='message'>"+message.body+"</div>")
          console.log(message.body);
        }
      });
    });
  }

  sendMessage(message){
    this.stompClient.send("/app/hello" , {}, message);
    $('#input').val('');
  }

}
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angular中调用Js的方法

不是每次都管用，先记在这里

import * as Stomp from 'stompjs';
import * as SockJS from 'sockjs-client';
import * as $ from 'jquery';
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参考的文章

• Spring Boot + WebSockets + Angular 5
• sockjs_client_1.SockJS不是构造函数错误
• Using WebSocket to build an interactive web application