java_spring_依赖注入（构造器）

依赖注入对象可以 手工装配（建议） 和 自动装配

package com.PersonDaoBean.test;public interface PersonDao {public abstract void add();}

package com.PersonDaoBean.test;public class PersonDaoBean implements PersonDao {@Overridepublic void add(){System.out.println("PersonDaoBean执行。。。。。。。。。。。。。。。。。");} }

package com.dao.bean.www;public interface PersonServiceDao {public abstract void save();}

package com.bean.www;import com.PersonDaoBean.test.PersonDao; import com.dao.bean.www.PersonServiceDao;public class PersonServiceBean implements PersonServiceDao {private PersonDao personDao;private String name;public PersonServiceBean(PersonDao personDao, String name) {this.personDao = personDao;this.name = name;}public void save() {personDao.add();System.out.println(name);}}

//配置方法

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="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-3.0.xsd"><bean id="personDao" class="com.PersonDaoBean.test.PersonDaoBean"></bean><bean id="personService" class="com.bean.www.PersonServiceBean"><constructor-arg index="0" type="com.PersonDaoBean.test.PersonDao" ref="personDao"></constructor-arg><constructor-arg index="1" value="valueString"></constructor-arg></bean></beans>

//Test Class

package com.itcast.www;import static org.junit.Assert.*;import org.junit.BeforeClass; import org.junit.Test; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext;import com.dao.bean.www.PersonServiceDao;public class TestCaseDemo {@BeforeClasspublic static void setUpBeforeClass() throws Exception {}@Testpublic void instanceSpring() {ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");PersonServiceDao personService = (PersonServiceDao) ctx.getBean("personService");personService.save();}}

 

转载于:https://www.cnblogs.com/MarchThree/p/3720410.html

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