<?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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd">

</beans>

<!--指定要扫描的包-->
<context:component-scan base-package="ustc.wzh.pojo"></context:component-scan>

1 //@Component相当于<bean id="user" class="ustc.wzh.pojo.User"></bean>
2 @Component
3 public class User {
4     public String name;
5 }

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

1 //@Component相当于<bean id="user" class="ustc.wzh.pojo.User"></bean>
2 @Component
3 public class User {
4 
5     //@Value("小王")相当于<property name="name" value="小王"/>
6     @Value("小王")
7     public String name;
8 }

//@Component相当于<bean id="user" class="ustc.wzh.pojo.User"></bean>
@Component
public class User {
    
    public String name;

    //@Value("小王")相当于<property name="name" value="小王"/>
    @Value("小王")
    public void setName(String name) {
        this.name = name;
    }
}

 1 @Component
 2 @Scope("prototype")
 3 public class User {
 4 
 5     public String name;
 6 
 7     //@Value("小王")相当于<property name="name" value="小王"/>
 8     @Value("小王")
 9     public void setName(String name) {
10         this.name = name;
11     }
12 }