大家好呀,今天跟大家分享一个IOC容器小案例,希望对大家有所帮助哦!喜欢记得点个关注哦,更多精彩等你哦。
一、首先我们来创建一个service层包,在包中再建一个UserService类.
package service; import dao.UserDao; import dao.UserDaoimpl; public class UserService { //创建UserDao属性,生成set方法。 public void setUserDao(UserDao userDao) { this.userDao = userDao; } private UserDao userDao; public void add(){ System.out.println("你好,我是服务层哦!"); //创建UserDao对象 // UserDao userDao=new UserDaoimpl(); userDao.update(); } }
二、然后在建一个dao包,在包中分别建一个UserDao接口类和继承接口的UserDaoiml类。
package dao; public interface UserDao { public void update(); }
package dao; public class UserDaoimpl implements UserDao{ @Override public void update() { System.out.println("你好,我是接口层哦"); } }
三、接下来就是在xml文件中配置相应的数据咯
<?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="userService" class="service.UserService"> <property name="userDao" ref="userdaoIml"/> </bean> <bean id="userdaoIml" class="dao.UserDaoimpl"> </bean> </beans>
四、最后当然是建立一个测试类啦。
package TestSpring; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import service.UserService; public class testBean { public static void main(String[] args) { ApplicationContext context=new ClassPathXmlApplicationContext("Bean1.xml") ; UserService userService = context.getBean("userService", UserService.class); userService.add(); } }