レベル1：Beanのインスタンス化

問題解決コード：

1.applicationContext.xml

<?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 ="dog" class="educoder.Dog"></bean>
	<bean id="student" class="step2.Student">
		<property name="name" value="Tom"></property>
	</bean>
	<!-- 配置后处理器  -->
	<bean class="step2.MyBeanPostProcessor"></bean>
</beans>

2.Task.java

package step1;

import educoder.Dog;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import java.util.ArrayList;
import java.util.List;

public class Task {
    
    
	public ApplicationContext getConfig(){
    
    
		/********** Begin **********/
		ApplicationContext app = new ClassPathXmlApplicationContext("applicationContext.xml");
		return app;
		/********** End **********/
	}
	
	public List<Dog> getsingle(ApplicationContext app){
    
    
		List<Dog> list=new ArrayList<>();
		/********** Begin **********/
		Dog dog1 = app.getBean("dog1",Dog.class);
		dog1.setName("大黄");
		Dog dog2 = app.getBean("dog1",Dog.class);
		dog2.setName("发菜");
		list.add(dog1);
		list.add(dog2);
		/********** End **********/
		return list;
	}
	
	public List<Dog> getMultiton(ApplicationContext app){
    
    
		List<Dog> list=new ArrayList<>();
		/********** Begin **********/
		Dog dog1 = app.getBean("dog2",Dog.class);
		dog1.setName("大黄");
		Dog dog2 = app.getBean("dog2",Dog.class);
		dog2.setName("发菜");
		list.add(dog1);
		list.add(dog2);
		/********** End **********/
		return list;
	}
}