java高级教程 俩数之和

Test.java:

package com.itheima.ioc;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Test{

    public static void main(String[] args) {

        ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");

        UserDao UserDao = (UserDao) applicationContext.getBean("UserDao");

        UserDao.add();

    }

}

UserDao.java:

package com.itheima.ioc;

public interface UserDao {

    public void add();

}

 

UserDaoimp.java:

package com.itheima.ioc;

 

public class UserDaoimp implements UserDao {

    public void add(){

       int x = 13;

       int y = 14;

       int sum;

       sum = x+y;

       System.out.println("x的值为："+x);

       System.out.println("y的值为："+y);

       System.out.println("x与y的和是："+sum);

    }

   

 

}

Xml文件：

<?tml 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-4.3.xsd">

    <!--将指定类配置给 Spring,让 Spring 创建其对象的实例-->

    <bean id="UserDao" class="com.itheima.ioc.UserDaoimp"/>  

</beans>