springboot实现事件监听机制

• • 1.编写事件类（继承ApplicationEvent）
  • 2.编写事件监听的类（实现ApplicationListener<事件类>）
  • 3.编写控制器（发布事件）
  • 4.运行接口
  • 5.控制台效果

public class MyApplicationEvent extends ApplicationEvent {

    public MyApplicationEvent(Object source) {
        super(source);
    }
}

@Component
public class MyApplicationListener implements ApplicationListener {
    @Override
    public void onApplicationEvent(MyApplicationEvent event) {
        String source = (String)event.getSource();
        System.out.println("开始发短信:"+source);
    }
}

@RestController
public class MyApplicationController implements ApplicationContextAware {
    private ApplicationContext applicationContext;//注入上下文
    //实现setApplicationContext方法
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
         this.applicationContext = applicationContext;
    }
    //定义一个接口用于触发自己编写的事件
    @GetMapping("api/getMsg")
    public String api(){
        //发布事件
        applicationContext.publishEvent(new MyApplicationEvent("张三下单了"));
        return "hello cross";
    }
}