package com.songyan.demo1; public interface UserDao { public void say(); }
package com.songyan.demo1; public interface UserService { public void say(); }
package com.songyan.demo1; public class UserDaoImpl implements UserDao{ public void say() { System.out.println("UsdeDao say helloWord"); } }
package com.songyan.demo1; public class UserServiceImpl implements UserService{ private UserDao userDao; public void setUserDao(UserDao userDao) { this.userDao=userDao; } public void say() { this.userDao.say(); System.out.println("hello"); } }
<?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="userDao" class="com.songyan.demo1.UserDaoImpl" ></bean> <bean id="userService" class="com.songyan.demo1.UserServiceImpl"> <property name="userDao" ref="userDao"></property></bean> </beans>
package com.songyan.demo1;
import javax.xml.registry.infomodel.User;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class Test {
public static void main(String[] args) {
//初始化容器，加载xml
ApplicationContext application =new ClassPathXmlApplicationContext("applicationContext.xml");
//通过容器获取javabean对象实例
UserDao userDao=(UserDao)application.getBean("userDao");
//调用实例的方法
userDao.say();
//通过容器获取UserService对象
UserService userService=(UserService)application.getBean("userService");
userService.say();
}
}
原文：https://www.cnblogs.com/excellencesy/p/9100371.html