spring学习之四“自动装配”

一。根据名字自动装配：

前提一、设置default-autowire="byName"

前提二、id="bean5"和bean2中定义的有一个属性叫“bean5”一致

1、配置文件applicationContext-beans.xml

 

<beans xmlns="http://www.springframework.org/schema/beans"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xmlns:aop="http://www.springframework.org/schema/aop"
      xmlns:tx="http://www.springframework.org/schema/tx"
      xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
           http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd
           http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd" 
           default-autowire="byName"          >

<bean id="bean2" class="com.bjsxt.spring.Bean2"/>
	 
	<bean  id="bean5" class="com.bjsxt.spring.Bean5">
		<property name="age" value="20"/>
	</bean>

 

2、配置文件applicationContext-other.xml

   <bean id="beanAbstract" abstract="true">
   		<property name="id" value="1000"/>
   		<property name="name" value="Jack"/>
   </bean>         
   
   <bean id="bean3" class="com.bjsxt.spring.Bean3" parent="beanAbstract">
   		<property name="name" value="Tom"/>
   		<property name="password" value="123"/>
   </bean>        
   
   <bean id="bean4" class="com.bjsxt.spring.Bean4" parent="beanAbstract"/>
</beans>

备注：省略部分bean.java代码：附上Bean2.java

public class Bean2 {

	private Bean3 bean3;
	
	private Bean4 bean4;
	
	private Bean5 bean5;

	public Bean3 getBean3() {
		return bean3;
	}

	public void setBean3(Bean3 bean3) {
		this.bean3 = bean3;
	}

	public Bean4 getBean4() {
		return bean4;
	}

	public void setBean4(Bean4 bean4) {
		this.bean4 = bean4;
	}

	public Bean5 getBean5() {
		return bean5;
	}

	public void setBean5(Bean5 bean5) {
		this.bean5 = bean5;
	}
}

 

3、测试代码：

public class AutowireTest extends TestCase {
	
	private BeanFactory factory;
	
	@Override
	protected void setUp() throws Exception {
		factory = new ClassPathXmlApplicationContext("applicationContext-*.xml");	
	}

	public void testAutowire() {
		Bean2 bean2 = (Bean2)factory.getBean("bean2");
		System.out.println("bean2.bean3.id=" + bean2.getBean3().getId());
		System.out.println("bean2.bean3.name=" + bean2.getBean3().getName());
		System.out.println("bean2.bean3.password=" + bean2.getBean3().getPassword());
		System.out.println("bean2.bean4.id=" + bean2.getBean4().getId());
		System.out.println("bean2.bean4.name=" + bean2.getBean4().getName());
		System.out.println("bean2.bean5.age=" + bean2.getBean5().getAge());
	}
	
}

 

 

4、测试结果

bean2.bean3.id=1000
bean2.bean3.name=Tom
bean2.bean3.password=123
bean2.bean4.id=1000
bean2.bean4.name=Jack
bean2.bean5.age=20

 

一。根据类型自动装配：

前提一、设置default-autowire="byType"介意使用这个，名字写错了也不会错

<beans xmlns="http://www.springframework.org/schema/beans"
	     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	     xmlns:aop="http://www.springframework.org/schema/aop"
	     xmlns:tx="http://www.springframework.org/schema/tx"
	     xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
           http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd
           http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd" 
          default-autowire="byType"
           >
	
	<!-- 
	<bean id="bean2" class="com.bjsxt.spring.Bean2">
		<property name="bean3" ref="bean3"/>
		<property name="bean4">
			<ref bean="bean4"/>
		</property>	
		<property name="bean5" ref="bean5"/>
	</bean>
	 -->
	
	<bean id="bean2" class="com.bjsxt.spring.Bean2"/>
	 
	<bean id="bean5111" class="com.bjsxt.spring.Bean5">
		<property name="age" value="20"/>
	</bean>
</beans>

 

<bean id="beanAbstract" abstract="true">
   		<property name="id" value="1000"/>
   		<property name="name" value="Jack"/>
   </bean>         
   
   <bean id="bean3222" class="com.bjsxt.spring.Bean3" parent="beanAbstract">
   		<property name="name" value="Tom"/>
   		<property name="password" value="123"/>
   </bean>        
   
   <bean id="bean42222" class="com.bjsxt.spring.Bean4" parent="beanAbstract"/>
</beans>

 

测试代码和测试结果和上面所述一致。