springboot+websocket+angular

一、websocket服务端代码参考 另一篇博客 --> 传送门

二、ng new socket 创建angular demo项目

ng new socket

三、安装 stompjs js库

npm install stompjs --save

四、app.component.ts 代码 (和js的写法大同小异)

import { Component } from '@angular/core';
const SockJS = require('sockjs-client');
const Stomp = require('stompjs');

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {
  title = 'app works!';
  stompClient: any;

  constructor() {
    const that = this;
    const socket = new SockJS('http://localhost:8080/websocket-server');
    this.stompClient = Stomp.over(socket);
    this.stompClient.connect({}, function (frame) {
      console.log('Connected: ' + frame);
      that.stompClient.subscribe('/topic/message', function (greeting) {
        alert(greeting);
      });
    }, function (err) {
      console.log('err', err);
    });
  }

  send() {
    this.stompClient.send('/server/send', {}, 'send');
  }
}

五、app.component.html

<div><button (click)="send()">点击</button></div>

六、启动java项目和angular项目 访问localhost:4200 点击按钮测试