Spring三种注入方式（二）

通过访问器方法(set)注入

此方法较为常用.在目标类中,定义要注入的属性,并添加访问器方法,则spring会自动注入.

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Source.java

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package com.gary.test;public class Source {public void helloWorld(){System.out.println("Hello World!");}}

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Target.java

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package com.gary.test;public class Target {private Source source;public void setSource(Source source) {this.source = source;}public Source getSource() {return source;}public void sayHelloWorld(){getSource().helloWorld();}}

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applicationContext.xml

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<?xml version="1.0" encoding="UTF-8"?><beansxmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:p="http://www.springframework.org/schema/p"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd"default-autowire="byType"><bean id="source" /><bean id="target" ref="source" /> --></bean></beans>

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TargetTest.java

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package com.gary.test;import org.junit.AfterClass;import org.junit.BeforeClass;import org.junit.Test;import org.springframework.beans.factory.BeanFactory;import org.springframework.context.support.ClassPathXmlApplicationContext;public class TargetTest {static BeanFactory factory = null;static Target target = null;@BeforeClasspublic static void setUpBeforeClass() throws Exception {try{factory = new ClassPathXmlApplicationContext("applicationContext.xml");target = (Target) factory.getBean("target");}catch(Exception e){e.printStackTrace();}}@AfterClasspublic static void tearDownAfterClass() throws Exception {}@Testpublic void testSayHelloWorld() {target.sayHelloWorld();}}

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运行结果

Hello World!

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源码见附件

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