XML配置类

<?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:p="http://www.springframework.org/schema/p"
       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">

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

Order 类

package com.componentScan.pojo;

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

@Data
@Component
public class Order {
    @Value("202102155645")
    private String order;
}

User 类

package com.componentScan.pojo;

import lombok.Data;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

@Data
@Component //相当于 <bean id="user" class="com.componentScan.pojo.User" />
public class User {
    @Value("chenxb")
    private String name;
    @Autowired
    private Order order;
}

测试类

package com.componentScan;

import com.componentScan.pojo.User;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

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