spring boot 事件监听

 

记录工作中的点点滴滴。。。。。。

 

maven依赖

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.4.RELEASE</version>
    </parent>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
    </dependencies>

 

package com.tsing.event;

import org.springframework.context.ApplicationEvent;

public class MyApplicationEvent extends ApplicationEvent{

    /**
     * 
     */
    private static final long serialVersionUID = 1L;

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

}

 

将监听器纳入到 spring 容器的方式:
1. 代码: application.addListeners(new MyApplicationListener()); + 实现 ApplicationListener接口
2. @Component注解 + 实现 ApplicationListener接口
3. 配置文件的方式 + 实现 ApplicationListener接口
4. @Component注解 + @EventListener注解

 

 

方式1

package com.tsing.event;

import org.springframework.context.ApplicationListener;

public class MyApplicationListener implements ApplicationListener<MyApplicationEvent>{

    @Override
    public void onApplicationEvent(MyApplicationEvent event) {
        System.out.println("MyApplicationListener接收到事件:" + event.getClass());
    }

}

 

 

package com.tsing;

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

import com.tsing.event.MyApplicationEvent;
import com.tsing.event.MyApplicationListener;

@SpringBootApplication
public class Application {
    public static void main(String[] args) {
        SpringApplication sp = new SpringApplication(Application.class);
        // 配置事件监听器
        sp.addListeners(new MyApplicationListener());
        
        ConfigurableApplicationContext context = sp.run(args);
        // 发布事件
        context.publishEvent(new MyApplicationEvent(new Object()));
        
        //context.close();
    }
}

 

 

方式2

package com.tsing.event;

import org.springframework.context.ApplicationListener;
import org.springframework.stereotype.Component;
/**
 * 将监听器纳入到 spring 容器的方式:
 * 1. 代码: application.addListeners(new MyApplicationListener()); + 实现 ApplicationListener接口
 * 2. @Component注解 + 实现 ApplicationListener接口
 * 3. 配置文件的方式 + 实现 ApplicationListener接口
 * 4. @Component注解 + @EventListener注解
 *
 */
@Component
public class MyApplicationListenerByAnnotation implements ApplicationListener<MyApplicationEvent>{

    @Override
    public void onApplicationEvent(MyApplicationEvent event) {
        System.out.println("MyApplicationListenerByAnnotation接收到事件:" + event.getClass());
    }

}

 

方式3

package com.tsing.event;

import org.springframework.context.ApplicationListener;
/**
 * 配置文件实现的方式
 *
 */
public class MyApplicationListenerByCF implements ApplicationListener<MyApplicationEvent>{

    @Override
    public void onApplicationEvent(MyApplicationEvent event) {
        System.out.println("MyApplicationListenerByCF接收到事件:" + event.getClass());
    }

}

 

配置文件application.properties

context.listener.classes=com.tsing.event.MyApplicationListenerByCF

 

方式4

package com.tsing.event;

import org.springframework.context.event.EventListener;
import org.springframework.stereotype.Component;

@Component
public class MyEventHandle {

    @EventListener
    public void event1(MyApplicationEvent event) {
        System.out.println("事件1==>>" + event.getClass());
    }

    @EventListener
    public void event2(MyApplicationEvent event) {
        System.out.println("事件2==>>" + event.getClass());
    }

    @EventListener
    public void event3(MyApplicationEvent event) {
        System.out.println("事件3==>>" + event.getClass());
    }
}