详解spring如何使用注解开发

<?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
       https://www.springframework.org/schema/context/spring-context.xsd">
       
    <!--指定要扫描的包，这个包下的注解会生效-->
    <context:component-scan base-package="com.chen.project"/>
    <context:annotation-config/>
</beans>

import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

//等价于<bean id="user" class="com.chen.dao.User"></bean>
@Component
public class User {

   public String name;
   
   //等价于<property name="name" value="lan"></property>
   @Value("LAN")
   public void setName(String name) {
       this.name = name;
   }
}

@Scope("singleton")
public class User {
}

<!--指定要扫描的包，这个包下的注解会生效-->
   <context:component-scan base-package="com.chen.project"/>
   <context:annotation-config/>