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核心容器:

Demo:

pom.xml

   	
    
     4.0.0
    	
    
     com.zhagndi
    	
    
     spring-annotation
    	
    
     0.0.1-SNAPSHOT
    	
    		
     		
     			
      
       org.springframework
      			
      
       spring-context
      			
      
       4.3.12.RELEASE
      		
     	
    
   

beans.xml

Person:

package com.zhangdi.bean;public class Person {
   	private String name;	private Integer age;		public Person() {
   		super();		// TODO Auto-generated constructor stub	}	public Person(String name, Integer age) {
   		super();		this.name = name;		this.age = age;	}	public String getName() {
   		return name;	}	public void setName(String name) {
   		this.name = name;	}	public Integer getAge() {
   		return age;	}	public void setAge(Integer age) {
   		this.age = age;	}	@Override	public String toString() {
   		return "Person [name=" + name + ", age=" + age + "]";	}}

MainConfig.java:

package com.zhangdi.config;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;import com.zhangdi.bean.Person;/** * @author 张 迪 *  */@Configurationpublic class MainConfig {
   		@Bean("person")	public Person person() {
   		return new Person("lisi",20);	}}

MainTest.java:

package com.zhangdi;import org.springframework.context.ApplicationContext;import org.springframework.context.annotation.AnnotationConfigApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;import com.zhangdi.bean.Person;import com.zhangdi.config.MainConfig;public class MainTest {
   	@SuppressWarnings("resource")	public static void main(String[] args) {
   		// TODO Auto-generated constructor stub//		ApplicationContext applicationContext = new ClassPathXmlApplicationContext("beans.xml");//		Object bean = applicationContext.getBean("Person");//		System.out.println(bean);				ApplicationContext applicationContext = new AnnotationConfigApplicationContext(MainConfig.class);		Person bean = applicationContext.getBean(Person.class);		System.out.println(bean);		String[] beanNamesForType = applicationContext.getBeanNamesForType(Person.class);		for (String name : beanNamesForType) {
   			System.out.println(name);		}			}}