spring | @EventListener

事件监听注解。

目录结构如下

- src.main.java
	- com.lou.springboot
		- Application.java
		- Component1.java
		- UserEvent.java

Application.java

package com.lou.springboot;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ConfigurableApplicationContext;

import java.io.IOException;

/**
 * Hello shiyanlou!
 */
@SpringBootApplication
public class Application {

    public static void main(String[] args) throws NoSuchFieldException, IllegalAccessException, IOException {
        ConfigurableApplicationContext configurableApplicationContext = SpringApplication.run(Application.class, args);

        configurableApplicationContext.publishEvent(new UserEvent(configurableApplicationContext)); // 发送事件

    }
}

UserEvent.java

package com.lou.springboot;

import org.springframework.context.ApplicationEvent;

public class UserEvent extends ApplicationEvent {
    public UserEvent(Object source) {
        super(source);
    }
}

Component1.java

package com.lou.springboot;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.event.EventListener;
import org.springframework.stereotype.Component;

@Component
public class Component1 {

    private static final Logger logger = LoggerFactory.getLogger(Component.class);

    @EventListener // 监听注解
    public void aaa(UserEvent event) {
        logger.info("123 {}", event);
    }
}