【Spring学习笔记-3.1】让bean获取spring容器上下文(applicationContext.xml)

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让bean获取spring容器(applicationContext.xml)

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一、继承

ApplicationContextAware接口

只需要让java类继承

ApplicationContextAware 接口，并实现方法setApplicationContext，

即可获取spring容器自身 ；

---

Person.java

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package org.crazyit.app.service;

import org.springframework.context.*;
import org.springframework.beans.BeansException;
import java.util.Locale;

public class Person implements ApplicationContextAware
{
	// 将BeanFactory容器以成员变量保存
	private ApplicationContext ctx;

	/* Spring容器会检测容器中所有Bean，如果发现某个Bean实现了ApplicationContextAware接口，
	Spring容器会在创建该Bean之后，自动调用该方法，调用该方法时，
	会将容器本身作为参数传给该方法。*/
	public void setApplicationContext(ApplicationContext ctx)
		throws BeansException
	{
		this.ctx = ctx;
	}
	public void sayHi(String name)
	{
		System.out.println(ctx.getMessage("hello" , new String[]{name}
			, Locale.getDefault()));   //使用spring容器获取国际化文件中"hello,{0}"
	}
}

---

---

配置文件beans.xml

在该文件中配置了一个国际化资源文件，message1 ==>message1_zh_CN.properities

---

<?xml version="1.0" encoding="GBK"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns="http://www.springframework.org/schema/beans"
	xsi:schemaLocation="http://www.springframework.org/schema/beans
	http://www.springframework.org/schema/beans/spring-beans-4.0.xsd">
	<!-- 加载容器国际化所需要的语言资源文件 -->
	<bean id="messageSource"
	class="org.springframework.context.support.ResourceBundleMessageSource">
		<property name="basenames">
			<list>
				<value>message1</value>
			</list>
		</property>
	</bean>


	<!-- Spring容器会检测容器中所有Bean，如果发现某个Bean实现了
	ApplicationContextAware接口，Spring容器会在创建该Bean之后，
	自动调用该Bean的setApplicationContext()方法，调用该方法时，
	会将容器本身作为参数传给该方法。-->
	<bean id="person" class="org.crazyit.app.service.Person"/>
</beans>

---

国际化资源文件

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测试代码：SpringTest.java

---

package lee;

import java.io.*;
import org.springframework.context.*;
import org.springframework.context.support.*;

import org.crazyit.app.service.*;
public class SpringTest
{
	public static void main(String[] args)throws Exception
	{
		ApplicationContext ctx = new
			ClassPathXmlApplicationContext("beans.xml");
		Person p = ctx.getBean("person" , Person.class);
		p.sayHi("孙悟空");
	}
}

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运行结果：

来自为知笔记(Wiz)