spring开发_spring构造注入Bean

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方法/src/com/b510/dao/AnimaleDao.java

com.b510.dao; AnimaleDao { 方法 say(); }

方法/src/com/b510/dao/impl/DogDaoImpl.java

com.b510.dao.impl; com.b510.dao.AnimaleDao; DogDaoImpl AnimaleDao { String name; String getName() { name; } setName(String name) { .name = name; } say(){ System.out.println(name+" is a dog,he likes bone"); } }

方法/src/com/b510/service/ServiceBean.java

com.b510.service; ServiceBean { 输出相关信息 myPetSay(); }

方法/src/com/b510/service/impl/ServiceBeanImpl.java

com.b510.service.impl; com.b510.dao.AnimaleDao; com.b510.service.ServiceBean; 一个实现类 ServiceBeanImpl ServiceBean { AnimaleDao animaleDao; myPetSay(){ animaleDao.say(); } AnimaleDao getAnimaleDao() { animaleDao; } 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 函数 aram一个实例 setAnimaleDao(AnimaleDao animaleDao) { .animaleDao = animaleDao; } }

方法/src/beans.xml

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http:spring-beans-2.5.xsd"> ="com.b510.dao.impl.DogDaoImpl"> ="com.b510.service.impl.ServiceBeanImpl">

方法/src/com/b510/test/SpringTest.java

com.b510.test; org.springframework.context.ApplicationContext; org.springframework.context.support.ClasspathXmlApplicationContext; com.b510.service.ServiceBean; SpringTest { main(String[] args) { ApplicationContext ctx= ClasspathXmlApplicationContext("beans.xml"); ServiceBean serviceBean=(ServiceBean) ctx.getBean("serviceDao"); serviceBean.myPetSay(); } }

效果：

2012-3-7 23:34:52 org.springframework.context.support.AbstractApplicationContext prepareRefresh 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 2012-3-7 23:34:52 org.springframework.beans.factory.xml.XmlBeanDeFinitionReader loadBeanDeFinitions 信息: Loading XML bean deFinitions from path resource [beans.xml] 2012-3-7 23:34:52 org.springframework.context.support.AbstractApplicationContext obtainFreshbeanfactory 信息: Bean factory application context [org.springframework.context.support.ClasspathXmlApplicationContext@15eb0a9]: org.springframework.beans.factory.support.DefaultListablebeanfactory@161f10f 2012-3-7 23:34:52 org.springframework.beans.factory.support.DefaultListablebeanfactory preInstantiateSingletons 信息: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListablebeanfactory@161f10f: defining beans [animaleDao,serviceDao]; root of factory hierarchy 哈巴 is a dog,he likes bone