<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
    https://www.springframework.org/schema/beans/spring-beans-3.0.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-3.0.xsd">
</beans>

 <context:component-scan base-package="com.hc.pojo"/>

@Component("user")
// 相當(dāng)于配置文件中 <bean id="user" class="當(dāng)前注解的類"/>
public class User {
   public String name = "秦疆";
}

@Test
public void test(){
   ApplicationContext applicationContext =
       new ClassPathXmlApplicationContext("beans.xml");
   User user = (User) applicationContext.getBean("user");
   System.out.println(user.name);
}

@Component("user")
// 相當(dāng)于配置文件中 <bean id="user" class="當(dāng)前注解的類"/>
public class User {
   @Value("秦疆")
   // 相當(dāng)于配置文件中 <property name="name" value="秦疆"/>
   public String name;
}

@Component("user")
public class User {
   public String name;
   @Value("秦疆")
   public void setName(String name) {
       this.name = name;
  }
}

@Controller("user")
@Scope("prototype")
public class User {
   @Value("秦疆")
   public String name;
}

<context:annotation-config/> 

@Component  //將這個(gè)類標(biāo)注為Spring的一個(gè)組件，放到容器中！
public class Dog {
   public String name = "dog";
}

@Configuration  //代表這是一個(gè)配置類
public class MyConfig {
   @Bean //通過方法注冊(cè)一個(gè)bean，這里的返回值就Bean的類型，方法名就是bean的id！
   public Dog dog(){
       return new Dog();
  }
}

@Test
public void test2(){
   ApplicationContext applicationContext =
           new AnnotationConfigApplicationContext(MyConfig.class);
   Dog dog = (Dog) applicationContext.getBean("dog");
   System.out.println(dog.name);
}

@Configuration  //代表這是一個(gè)配置類
public class MyConfig2 {
}

@Configuration
@Import(MyConfig2.class)  //導(dǎo)入合并其他配置類，類似于配置文件中的 inculde 標(biāo)簽
public class MyConfig {
   @Bean
   public Dog dog(){
       return new Dog();
  }
}