spring开发_spring构造注入Bean

项目结构：

http://www.cnblogs.com/hongten/gallery/image/112399.html

/spring_0004_bean的注入方法/src/com/b510/dao/AnimaleDao.java

 1 package com.b510.dao;
 2 /**
 3  * 动物抽象类
 4  * @author Hongten
 5  *
 6  */
 7 public interface AnimaleDao {
 8 
 9     /**
10      * 动物的say()方法
11 */
12     public abstract void say();
13 
14 }

/spring_0004_bean的注入方法/src/com/b510/dao/impl/DogDaoImpl.java

 1 package com.b510.dao.impl;
 2 
 3 import com.b510.dao.AnimaleDao;
 4 
 5 
 6 public class DogDaoImpl implements AnimaleDao {
 7 
 8     private String name;
 9     
10     public String getName() {
11         return name;
12     }
13 
14     public void setName(String name) {
15         this.name = name;
16     }
17 
18     /* (non-Javadoc)
19      * @see com.b510.dao.impl.AnimaleDao#say()
20 */
21     public void say(){
22         System.out.println(name+" is a dog,he likes bone");
23     }
24 }

/spring_0004_bean的注入方法/src/com/b510/service/ServiceBean.java

 1 package com.b510.service;
 2 
 3 /**
 4  * ServiceBean接口
 5  * 
 6  * @author Hongten
 7  * 
 8  */
 9 public interface ServiceBean {
10 
11     /**
12      * 输出相关信息
13 */
14     public abstract void myPetSay();
15 
16 }

/spring_0004_bean的注入方法/src/com/b510/service/impl/ServiceBeanImpl.java

 1 package com.b510.service.impl;
 2 
 3 import com.b510.dao.AnimaleDao;
 4 import com.b510.service.ServiceBean;
 5 /**
 6  * ServiceBean的一个实现类
 7  * 
 8  * @author Hongten
 9  *
10  */
11 public class ServiceBeanImpl implements ServiceBean {
12 
13     private AnimaleDao animaleDao;
14     
15     /* (non-Javadoc)
16      * @see com.b510.service.impl.ServiceBean#myPetSay()
17 */
18     public void myPetSay(){
19         animaleDao.say();
20     }
21 
22     public AnimaleDao getAnimaleDao() {
23         return animaleDao;
24     }
25 
26     /**
27      * 设置一个AnimaleDao构造函数，Spring在注入的时候，就是调用此方法进行构造注入的
28      * 所以在使用构造注入的时候，一定要有此构造函数
29      * @param animaleDao AnimaleDao的一个实例
30 */
31     public void setAnimaleDao(AnimaleDao animaleDao) {
32         this.animaleDao = animaleDao;
33     }
34 }

/spring_0004_bean的注入方法/src/beans.xml

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans"
 3     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4     xsi:schemaLocation="http://www.springframework.org/schema/beans
 5            http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
 6     <bean id="animaleDao" class="com.b510.dao.impl.DogDaoImpl">
 7         <property name="name" value="哈巴"></property>
 8     </bean>
 9     <bean id="serviceDao" class="com.b510.service.impl.ServiceBeanImpl">
10         <property name="animaleDao" ref="animaleDao"></property>
11     </bean>
12 </beans>

/spring_0004_bean的注入方法/src/com/b510/test/SpringTest.java

 1 package com.b510.test;
 2 
 3 import org.springframework.context.ApplicationContext;
 4 import org.springframework.context.support.ClassPathXmlApplicationContext;
 5 
 6 import com.b510.service.ServiceBean;
 7 
 8 public class SpringTest {
 9     public static void main(String[] args) {
10         ApplicationContext ctx=new ClassPathXmlApplicationContext("beans.xml");
11         ServiceBean serviceBean=(ServiceBean) ctx.getBean("serviceDao");
12         serviceBean.myPetSay();
13     }
14 }

运行效果：

1 2012-3-7 23:34:52 org.springframework.context.support.AbstractApplicationContext prepareRefresh
2 信息: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@15eb0a9: display name [org.springframework.context.support.ClassPathXmlApplicationContext@15eb0a9]; startup date [Wed Mar 07 23:34:52 CST 2012]; root of context hierarchy
3 2012-3-7 23:34:52 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
4 信息: Loading XML bean definitions from class path resource [beans.xml]
5 2012-3-7 23:34:52 org.springframework.context.support.AbstractApplicationContext obtainFreshBeanFactory
6 信息: Bean factory for application context [org.springframework.context.support.ClassPathXmlApplicationContext@15eb0a9]: org.springframework.beans.factory.support.DefaultListableBeanFactory@161f10f
7 2012-3-7 23:34:52 org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletons
8 信息: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@161f10f: defining beans [animaleDao,serviceDao]; root of factory hierarchy
9 哈巴 is a dog,he likes bone