springboot 事件监听@EventListener实现

@EventListener简单描述

简化我们编写监听类的步骤，不需要再继承ApplicationListener接口去实现onApplicationEvent了。

示例：

Event

@Data
public class CustomEvent {

	private String title;

	private String message;

	public CustomEvent(String title, String message) {
		this.title = title;
		this.message = message;
	}
}

Listener

@Component
public class CustomEventListener {

	@EventListener(CustomEvent.class)
	public void onApplicationEvent(CustomEvent customEvent){
		System.out.println("监听器接受消息："+System.currentTimeMillis());
		System.out.println("标题title:" + customEvent.getTitle() + "接收到的消息为："+customEvent.getMessage());
	}
}

 Controller调用

@RestController
@RequestMapping("/pro/test")
public class TestController {

	@Resource
	private ApplicationContext applicationContext;

	@RequestMapping("/hello")
	public String hello(){
		System.out.println("事件开始发布消息："+System.currentTimeMillis());
		applicationContext.publishEvent(new CustomEvent("内容","你好啊"));

		return "success";
	}
}

结果：

事件开始发布消息：1644807739625
监听器接受消息：1644807739626
标题title:内容接收到的消息为：你好啊