Spring 实现自定义监听器案例

<!-- 自定义监听 启动加载系统参数 -->
 <listener>
 <listener-class>com.cn.framework.constant.OmsConfigLoader</listener-class>
</listener> 

package com.cn.framework.constant;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import org.apache.log4j.Logger;
import org.springframework.web.context.support.WebApplicationContextUtils;
import com.kxs.service.systemService.ISystemService;
public class OmsConfigLoader implements ServletContextListener {
private static Logger LOG = Logger.getLogger(OmsConfigLoader.class);
@Override
public void contextDestroyed(ServletContextEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void contextInitialized(ServletContextEvent arg0) {
LOG.info("==> 加载OMS系统配置信息 Start ==");
try {
ISystemService iSystemService = WebApplicationContextUtils.getWebApplicationContext(arg0.getServletContext())
.getBean(ISystemService.class);
iSystemService.refreshCache();
} catch (Exception e) {
e.printStackTrace();
LOG.info(e.toString());
}
LOG.info("==> 加载OMS系统配置信息 End ==");
}
}

public class RainEvent extends ApplicationEvent {
 private static final long serialVersionUID = 1L;
 public RainEvent(Object source) {
 super(source);
 } 
}

public class RainEventListener1 implements ApplicationListener<RainEvent> {
 //监听rainevent事件，调用当前方法
 @Override
 public void onApplicationEvent(RainEvent event) {
 Object source = event.getSource();
 System.out.println("监听器1："+source); 
 }
}
public class RainEventListener2 implements ApplicationListener<RainEvent> {
 //监听rainevent事件，调用当前方法
 @Override
 public void onApplicationEvent(RainEvent event) {
 Object source = event.getSource();
 System.out.println("监听器2："+source); 
 }
}

<!-- 配置监听器，向spring容器发布事件，自动触发监听器的onApplicationEvent方法 -->
<bean class="com.briup.ioc.event.RainEventListener1"></bean>
<bean class="com.briup.ioc.event.RainEventListener2"></bean>

public void ioc_event() {
 try {
  String path = "com/briup/ioc/event/event.xml";
  ApplicationContext container = 
    new ClassPathXmlApplicationContext(path);
    
  container.publishEvent(new RainEvent("打雷了，下雨了！"));
 } catch (Exception e) {
  e.printStackTrace();
 }
}