Java Spring Tutorial -- autowire byName, byType, constructor

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文件结构：

package com.zxl.spring;public class MessageBean {private RefMessageBean refMessageBean;/* bean & constructor *//*public MessageBean(RefMessageBean refMessageBean){this.refMessageBean=refMessageBean;}*/public void setRefMessageBean(RefMessageBean refMessageBean){this.refMessageBean=refMessageBean;}public RefMessageBean getRefMessageBean(){return refMessageBean;}}

package com.zxl.spring;public class RefMessageBean {private String message;public RefMessageBean(String message){this.message=message;}public String getMessage(){return message;}}

package com.zxl.spring;import org.springframework.context.support.ClassPathXmlApplicationContext;public class SpringApp09 {/** * @param args */public static void main(String[] args) {// TODO Auto-generated method stubClassPathXmlApplicationContext context=new ClassPathXmlApplicationContext("SpringBeans.xml");MessageBean messageBean =(MessageBean) context.getBean("messageBean");System.out.println(messageBean.getRefMessageBean().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/beanshttp://www.springframework.org/schema/beans/spring-beans-3.0.xsd"><!-- bean --> <!-- <bean id="messageBean" class="com.zxl.spring.MessageBean" >    <constructor-arg ref="refMessageBean" /></bean><bean id="refMessageBean" class="com.zxl.spring.RefMessageBean" >    <constructor-arg value="hello!!" /></bean> --><!-- [][][] --><!-- constructor --> <!-- <bean id="messageBean" class="com.zxl.spring.MessageBean" autowire="constructor" /><bean class="com.zxl.spring.RefMessageBean">    <constructor-arg value="hello!!" /></bean>  --><!-- [][][] --><!-- byName --><!-- <bean id="messageBean" class="com.zxl.spring.MessageBean" autowire="byName" /><bean id="refMessageBean" class="com.zxl.spring.RefMessageBean" >    <constructor-arg value="hello!!" /></bean>  --><!-- [][][] --><!-- byType --><bean id="messageBean" class="com.zxl.spring.MessageBean" autowire="byType" /><bean id="refMessageBean" class="com.zxl.spring.RefMessageBean" >    <constructor-arg value="hello!!" /></bean> <!-- [][][] --></beans>