spring 事件订阅发布 demo 并实现异步处理

先创建 一个事件

package com.example.jpademo;
import org.springframework.context.ApplicationEvent;

public class Event_A extends ApplicationEvent {

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

 创建 一个事件监听器

package com.example.jpademo;

import org.springframework.context.ApplicationListener;
import org.springframework.scheduling.annotation.Async;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.stereotype.Component;

/**
 * 事件监听器
 * 
 * ApplicationListener
 *     
 * Event_A ： 监听的对象
 * */
@Component
@EnableAsync // 开启异步处理
public class ApplicationListener_A implements ApplicationListener {

    @Async // 开启异步处理
    @Override
    public void onApplicationEvent(Event_A a) {
        System.out.println("线程名称 " + Thread.currentThread().getName());
        Demo source = (Demo) a.getSource();
        System.out.println("source = " + source.getId());
        System.out.println("source = " + source.getName());
        try {
            Thread.currentThread().sleep(5000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        System.out.println("线程执行完成："+Thread.currentThread().getName());
    }
}

 写一个controller用于调用测试

package com.example.jpademo;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationEventPublisher;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class DemoController {
    @Autowired
    TopicEventPublisher publisher;

    private ApplicationEventPublisher applicationEventPublisher;

    @GetMapping("/push")
    public void send(String topic){
        Demo demo = new Demo();
        demo.setId("11111");
        demo.setName("张三");
        applicationEventPublisher.publishEvent(new Event_A(demo));
    }

}

 这个Demo类只是一个测试传输数据用的一个对象而已，换成其他类或者字符串等数据类型也不会有影响

如果需要这个测试demo的话，可以添加我qq找我要2102266433