Spring总结实例之消息与事件
2008-01-05 20:37:13 来源:WEB开发网前几天看到网友总结的自学经验,觉得说得很好,引文:光看别人骑自行车很轻易, 那么是不是看了几百遍别人怎么骑自行车你也就马上能骑着走了呢? 不摔跤是不可能学会的。
还有就是要经常总结:刚才说到会摔跤, 那么这时候就要总结碰到的问题, 这样下次再碰到就不会再去回忆了. 好记性不如烂笔头. 注释, 假如今天不写, 那么以后只会越来越忙, 以后再也没时间写注释了. If you doesn't have time to do it today, then when do you have time to do it tomorrow?
所以今天就写个SPRing的消息和事件实例。
1、javaBean:User.java
package cn.xy.hw;
/** *//**
* @author hanwei
*
*/
public class User ...{
private String name;
private int age;
public int getAge() ...{
return age;
}
public void setAge(int age) ...{
this.age = age;
}
public String getName() ...{
return name;
}
public void setName(String name) ...{
this.name = name;
}
}
2、用于国际化的两个消息资源文件:xiyou_en_US.properties和xiyou_zh_CN.properties
userlogin user ...{0} login at ...{1}
和
userlogin 使用者 ...{0} 于 ...{1}登入
自定义下雨的事件:RainEvent.java
package cn.xy.hw;
import org.springframework.context.applicationEvent;
/** *//**
* @author hanwei
*
*/
public class RainEvent extends ApplicationEvent ...{
public RainEvent(Object arg0) ...{
super(arg0);
System.out.println("乌云密布、闪电、打雷,紧接着,下起了瓢泼大雨。");
}
}
下雨事件监听器:RainListener.java
package cn.xy.hw;
import org.springframework.context.ApplicationEvent;
import org.springframework.context.ApplicationListener;
/** *//**
* @author hanwei
*
*/
public class RainListener implements ApplicationListener ...{
/**//* (non-Javadoc)
* @see org.springframework.context.ApplicationListener#onApplicationEvent(
org.springframework.context.ApplicationEvent)
*/
public void onApplicationEvent(ApplicationEvent arg0) ...{
if(arg0 instanceof RainEvent)...{
System.out.println("唐僧大喊:"+arg0.getSource()+"赶紧收衣服喽!");
}
}
}
配置文件:applicationContext.xml
<!--sp-->xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">
<bean id="user" class="cn.xy.hw.User" abstract="false"
lazy-init="default" autowire="default" dependency-check="default">
<property name="name">
<value>hanweivalue>
property>
<property name="age">
<value>20value>
property>
bean>
<bean id="messageSource"
class="org.springframework.context.support.ResourceBundleMessageSource"
abstract="false" lazy-init="default" autowire="default"
dependency-check="default">
<property name="basename" value="xiyou">property>
bean>
<bean id="listener" class="cn.xy.hw.RainListener" abstract="false"
lazy-init="default" autowire="default" dependency-check="default">
bean>
beans>
测试类:MianTest.java
package cn.xy.hw;
import java.util.Calendar;
import java.util.Locale;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
/** *//**
* @author hanwei
*
*/
public class MianTest ...{
public static void main(String[] args) ...{
ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
User user = (User)context.getBean("user");
Object[] obj=new Object[]...{user.getName(),Calendar.getInstance().getTime()};
System.out.println(context.getMessage("userlogin",obj
,"找不到指定模块!",Locale.CHINA));
System.out.println(context.getMessage("userlogin",obj
,"找不到指定模块!",Locale.US));
context.publishEvent(new RainEvent("下雨了!"));
}
}
OK了,这是运行测试类的结果:
使用者 hanwei 于 07-8-26 下午6:14登入
user hanwei login at 8/26/07 6:14 PM
乌云密布、闪电、打雷,紧接着,下起了瓢泼大雨。
唐僧大喊:下雨了!赶紧收衣服喽!
log4j:WARN No appenders could be found for logger (org.springframework.context.support.ClassPathXmlApplicationContext).
log4j:WARN Please initialize the log4j system properly.
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