基于Guava API轻松落地观察者模式

一 maven依赖

<dependency>
    <groupId>com.google.guava</groupId>
    <artifactId>guava</artifactId>
    <version>20.0</version>
</dependency>

二 创建监听事件

package Guava;

import com.google.common.eventbus.Subscribe;

public class GuavaEvent {
    @Subscribe
    public void subscribe(String str){
        System.out.println("执行subscribe方法，传入的参数是："+str);
    }
}

三 测试代码

package Guava;

import com.google.common.eventbus.EventBus;

public class Test {
    public static void main( String[] args ) {
        EventBus eventbus = new EventBus();
        GuavaEvent guavaEvent = new GuavaEvent();
        eventbus.register(guavaEvent);
        eventbus.post("tom");
    }
}

四 测试结果

执行subscribe方法，传入的参数是：tom

五 代码位置

https://gitee.com/cakin24/javatest/tree/master/src/main/java/Guava