一、原始的 xml配置方式

1.Spring pom 依赖 

         
      
       org.springframework
          
      
       spring-context
          
      
       4.1.2.RELEASE
      
     

2.JavaBean

public class Person {    private String name;        private Integer age;     public Person() {    }     public Person(String name, Integer age) {        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 + "]";    }}

3.beans.xml 

4.测试类

import org.springframework.context.support.ClassPathXmlApplicationContext;import com.atguigu.bean.Person; public class Test {     public static void main(String[] args) {        ClassPathXmlApplicationContext beans = new ClassPathXmlApplicationContext("beans.xml");        Person p = (Person)beans.getBean("person");        System.out.println(p);     } }

二、注解的形式

1. @Configuration替代beans.xml，@Bean 替代<bean>

package com.atguigu.config; import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.ComponentScan;import org.springframework.context.annotation.Configuration;import org.springframework.context.annotation.FilterType;import org.springframework.context.annotation.ComponentScan.Filter;import org.springframework.context.annotation.ComponentScans; import com.atguigu.bean.Person; //配置类==配置文件@Configuration  //告诉Spring这是一个配置类public class MainConfig {    //给容器中注册一个Bean;类型为返回值的类型，id默认是用方法名作为id    @Bean("person")    public Person person01(){        return new Person("lisi", 20);    } }

2.测试用例

package com.atguigu;import org.springframework.context.ApplicationContext;import org.springframework.context.annotation.AnnotationConfigApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;import com.atguigu.bean.Person;import com.atguigu.config.MainConfig; public class MainTest {        @SuppressWarnings("resource")    public static void main(String[] args) {                ApplicationContext applicationContext = new AnnotationConfigApplicationContext(MainConfig.class);        Person bean = applicationContext.getBean(Person.class);        System.out.println(bean);                String[] namesForType = applicationContext.getBeanNamesForType(Person.class);        for (String name : namesForType) {            System.out.println(name);        }    }}