测试三种获得对象方法

1.新建一个Demo实体类;

package com.eduask.entity;

public class Demo4 {

public Demo4(){

System.out.println("测试三种获得对象方式");

}

}

1. 新建一个TestDemo测试类;

package com.eduask.entity;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class TestDemo4 {

public static void main(String[] args) {

ClassPathXmlApplicationContext cx=new ClassPathXmlApplicationContext("demo4.xml");

Demo4 demo41=(Demo4) cx.getBean("Demo4");

Demo4 demo42=(Demo4) cx.getBean(Demo4.class);

Demo4 demo43=(Demo4) cx.getBean("Demo4",Demo4.class);

System.out.println(demo41);

System.out.println(demo42);

System.out.println(demo43);

}

}

2. 新建一个xml配置文件;

<?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="Demo4" class="com.eduask.entity.Demo4"></bean>

</beans>