Java Spring Tutorial -- Inner / Anonymous Beans

最新推荐文章于 2020-07-12 15:30:44 发布

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本文展示了一个使用Spring框架配置内部Bean（也称为匿名Bean）的例子。通过定义一个MessageBean类及其内部类InnerMessageBean，并在Spring配置文件中设置InnerMessageBean作为MessageBean的一个属性，演示了如何初始化并获取内部Bean的值。

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文件结构：

package com.zxl.spring;

public class InnerMessageBean {
	private String message;

	/**
	 * @return the message
	 */
	public String getMessage() {
		return message;
	}

	/**
	 * @param message the message to set
	 */
	public void setMessage(String message) {
		this.message = message;
	}
	
}

package com.zxl.spring;

public class MessageBean {
	private InnerMessageBean innerMessageBean;

	/**
	 * @return the innerMessageBean
	 */
	public InnerMessageBean getInnerMessageBean() {
		return innerMessageBean;
	}

	/**
	 * @param innerMessageBean the innerMessageBean to set
	 */
	public void setInnerMessageBean(InnerMessageBean innerMessageBean) {
		this.innerMessageBean = innerMessageBean;
	}
	
}

package com.zxl.spring;


import org.springframework.context.support.ClassPathXmlApplicationContext;

public class SpringApp11 {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		ClassPathXmlApplicationContext context=new ClassPathXmlApplicationContext("SpringBeans.xml");
		MessageBean messageBean=(MessageBean) context.getBean("messageBean");
		System.out.println(messageBean.getInnerMessageBean().getMessage());
		context.close();
	}

}

<?xml version="1.0" encoding="UTF-8"?>
<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-3.0.xsd">
	
    <bean id="messageBean" class="com.zxl.spring.MessageBean">
        <property name="innerMessageBean">
            <bean class="com.zxl.spring.InnerMessageBean">
                <property name="message" value="hello inner/anonymous beans!"/>
            </bean>
        </property>
    </bean>
	
</beans>