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Spring-事件傳遞
ApplicationEvent類和ApplicationListener接口來提供，通過ApplicationContext的publishEvent()方法來通知ApplicationListener
LogEvent
package com.gc.action;
import org.springframework.context.ApplicationEvent;
import org.springframework.context.ApplicationListener;
public class LogEvent extends ApplicationEvent{
/**
*
*/
private static final long serialVersionUID = 1L;
public LogEvent(Object msg) {
super(msg);
// TODO Auto-generated constructor stub
}
}
LogListener
package com.gc.action;
import org.springframework.context.ApplicationEvent;
import org.springframework.context.ApplicationListener;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
public class LogListener implements ApplicationListener{
@Override
public void onApplicationEvent(ApplicationEvent event) {
// TODO Auto-generated method stub
if(event instanceof LogEvent) {
//設定時間
SimpleDateFormat format=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
format.setLenient(false);
String currentDate=format.format(new Date());
System.out.println("輸出時間："+currentDate+"輸出內容："+event.toString());
}
}
}
LOG
package com.gc.action;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
public class Log implements ApplicationContextAware{
//設定變量applicationContext
private ApplicationContext applicationContext;
//變量applicationContext的set方法
@Override
public void setApplicationContext(ApplicationContext applicationContext)
throws BeansException {
// TODO Auto-generated method stub
this.applicationContext=applicationContext;
}
//通過publishEvent發布時間
public int log(String log) {
LogEvent event=new LogEvent(log);;
this.applicationContext.publishEvent(event);
return 0;
}
}
配置文件：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN"
"https://www.springframework.org/dtd/spring-beans.dtd">
<beans>
<!--定義一個Bean-->
<bean >
</bean>
<bean />
<bean />
<bean />
</beans>
測試程序：
package com.gc.test;
import java.util.Date;
import org.springframework.beans.BeanWrapper;
import org.springframework.beans.BeanWrapperImpl;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;
import org.springframework.core.io.ClassPathResource;
import com.gc.action.HelloWorld;
import com.gc.action.Log;
public class TestHelloWorld {
public static void main(String[] args) throws InstantiationException, IllegalAccessException, ClassNotFoundException
{
ApplicationContext actx=new FileSystemXmlApplicationContext("config.xml");
Log log=(Log)actx.getBean("log");
log.log("gf");
//拿出Bean在配置文檔中設定的內容
//System.out.println(helloWorld.getDate()+" "+helloWorld.getMsg()+"------");
}
}
輸出：
輸出時間：2012-03-20 20:38:05輸出內容：com.gc.action.LogEvent[source=gf]
最後更新：2017-04-02 22:16:38