spring @EventListener 事件与监听的示例详解

package com.ybw.event.pojo;
import lombok.Getter;
import lombok.Setter;
import org.springframework.context.ApplicationEvent;
/**
 * @className MyEvent
 * @author weixiansheng
 * @date 2023/9/28 
 * @version V1.0
 **/
@Setter
@Getter
public class MyEvent extends ApplicationEvent {
    private String data;
    public MyEvent(Object source, String data) {
        super(source);
        this.data = data;
    }
}

package com.ybw.event.listener;
import com.ybw.event.pojo.MyEvent;
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.event.EventListener;
import org.springframework.stereotype.Component;
/**
 * 简单监听
 *
 * @author weixiansheng
 * @version V1.0
 * @className MySimpleListener
 * @date 2023/9/28
 **/
@Component
@Slf4j
public class MySimpleListener {
    /**
     * @param event
     * @methodName: handleDemoEvent
     * @return: void
     * @author: weixiansheng
     * @date: 2023/9/28
     **/
    @EventListener
    public void handleDemoEvent(MyEvent event) {
        log.info("发布的data为:{}", event.getData());
    }
}

package com.ybw.event.listener;
import com.ybw.event.pojo.MyEvent;
import com.ybw.util.SpringContextHolder;
import lombok.extern.slf4j.Slf4j;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;
import java.util.concurrent.TimeUnit;
/**
 * @author weixiansheng
 * @version V1.0
 * @className MySimpleListenerTest
 * @date 2023/9/28
 **/
@SpringBootTest
@Slf4j
class MySimpleListenerTest {
    /**
     * 发布消息
     *
     * @methodName: publishEvent
     * @return: void
     * @author: weixiansheng
     * @date: 2023/9/28
     **/
    @Test
    public void publishEvent() throws InterruptedException {
        log.info("publishEvent start");
        SpringContextHolder.publishEvent(new MyEvent(this, "测试"));
        log.info("publishEvent end");
        TimeUnit.DAYS.sleep(1);
    }
}

/**
 * 普通监听
 *
 * @param event
 * @methodName: handleDemoEvent
 * @return: void
 * @author: weixiansheng
 * @date: 2023/9/28
 **/
@EventListener
@Order(2)
public void handleEvent(MyEvent event) throws InterruptedException {
    TimeUnit.SECONDS.sleep(1);
    log.info("handleEvent data:{}", event.getData());
}
/**
 * 条件监听
 *
 * @param event
 * @methodName: handleConditionEvent
 * @return: void
 * @author: weixiansheng
 * @date: 2023/9/28
 **/
@EventListener(condition = "#event.data=='张三'")
@Order(1)
public void handleConditionEvent(MyEvent event) {
    log.info("handleConditionEvent data:{}", event.getData());
}

/**
 * 普通监听
 *
 * @param event
 * @methodName: handleDemoEvent
 * @return: void
 * @author: weixiansheng
 * @date: 2023/9/28
 **/
@EventListener
public void handleEvent(MyEvent event) throws InterruptedException {
    TimeUnit.SECONDS.sleep(1);
    log.info("handleEvent data:{}", event.getData());
}
/**
 * 条件监听
 *
 * @param event
 * @methodName: handleConditionEvent
 * @return: void
 * @author: weixiansheng
 * @date: 2023/9/28
 **/
@Async
@EventListener(condition = "#event.data=='张三'")
public void handleConditionEvent(MyEvent event) {
    log.info("handleConditionEvent data:{}", event.getData());
}