Spring基础：快速入门spring（4）：setter注入

定义注入依赖的interface

package com.liumiao.demo.spring;

public interface TeachingService {
public String provideTeachingService();
}

定义注入依赖的类

package com.liumiao.demo.spring;

public class SwimmingTeachingService implements TeachingService {
@Override
public String provideTeachingService(){
return "I provide service of teaching swimming.";
}
}

修改Student类

package com.liumiao.demo.spring;

public class Student implements Person {
private TeachingService teachingService;
public Student(){
System.out.println("Student Default construct is called...");
}
public void setTeachingService(TeachingService service){
teachingService=service;
}
@Override
public String sayhello(){
return "Hello, I am a student.";
}
@Override
public String provideTeachingService(){
return "I teach how to study...";
}
}

配置spring设定文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"> 
<bean id="thePerson" class="com.liumiao.demo.spring.Student">
<property name="teachingService" ref="theService"></property>
</bean>

<bean id="theService" class="com.liumiao.demo.spring.SwimmingTeachingService">
</bean>

</beans>

执行结果

十一月 26, 2016 7:27:59 下午 org.springframework.context.support.ClassPathXmlApplicationContext prepareRefresh
信息: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@25f38edc: startup date [Sat Nov 26 19:27:59 CST 2016]; root of context hierarchy
十一月 26, 2016 7:27:59 下午 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
信息: Loading XML bean definitions from class path resource [com/liumiao/demo/spring/spring-cfg.xml]
Student Default construct is called...
Hello, I am a student.
I teach how to study...十一月 26, 2016 7:27:59 下午 org.springframework.context.support.ClassPathXmlApplicationContext doClose
信息: Closing org.springframework.context.support.ClassPathXmlApplicationContext@25f38edc: startup date [Sat Nov 26 19:27:59 CST 2016]; root of context hierarchy