事件
@SuppressWarnings("serial") public class CheckEvent extends ApplicationEvent { public CheckEvent(Object source) { super(source); } }
事件处理监听器
@Component public class CheckListener implements ApplicationListener<CheckEvent> { @Override public void onApplicationEvent(CheckEvent event) { Object user = event.getSource(); //CheckEvent构造函数的参数,不可为null } }
发布事件
ContextUtil.getApplicationContext().publishEvent(new CheckEvent(Class.clazz)); //放不为空数据,或者要处理的数据
ContextUtil.java 自己写的获取Spring上下文工具类
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
public class ContextUtil implements ApplicationContextAware { private static ApplicationContext applicationContext; // Spring应用上下文环境 /* * 实现了ApplicationContextAware 接口,必须实现该方法; * 通过传递applicationContext参数初始化成员变量applicationContext */ public void setApplicationContext(ApplicationContext applicationContext) throws BeansException { ContextUtil.applicationContext = applicationContext; } public static ApplicationContext getApplicationContext() { return applicationContext; } @SuppressWarnings("unchecked") public static <T> T getBean(String name) throws BeansException { return (T) applicationContext.getBean(name); } }
注意: 上面配置为同步配置, 还有异步配置
需要重新实现SimpleApplicationEventMulticaster
Spring 4.2之后有了@EventLisnter省掉了监听器