package com.java.test;

/**

 * @author nidegui

 * @create 2019-06-22 10:58

 */

public class Helloworld {

    public void say(){

        System.out.println("nihao spring");

    }

}

<?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="helloWorld" class="com.java.test.Helloworld"></bean>

</beans>

package com.java.test;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

/**

 * @author nidegui

 * @create 2019-06-22 11:00

 */

public class Test {

    public static void main(String[] args) {

        ApplicationContext ac = new ClassPathXmlApplicationContext("beans.xml"); //获取bean

        Helloworld helloWorld = (Helloworld) ac.getBean("helloWorld");   //获取bean的名字

        helloWorld.say();

    }

}