package com.example.ba01;
import org.springframework.stereotype.Component;

/*@Component：创建对象，等同于<bean>的功能
*       属性：value 就是对象的名称，也是bean的id值
*            value的值是唯一的，创建的对象在整个spring容器中就一个
*       位置：在类的上面
* 
* @Component(value = "myStudent")等同于
*   <bean id = "myStudent" class = "com.example.ba01.Student" />
* */

@Component(value = "myStudent")
public class Student {
    private String name;
    private Integer age;

    public void setName(String name) {
        this.name = name;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    @Override
    public String toString() {
        return "Student{" +
                "name=‘" + name + ‘\‘‘ +
                ", age=" + age +
                ‘}‘;
    }
}

<?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">

    <!--声明组件扫描器(component-scan)，组件就是java对象
        base-package：指定注解在你的项目中的包名
        component-scan工作方式：spring会扫描遍历base-package指定的包，
            把包中和子包中的所有类，找到类中的注解，按照注解的功能创建对象，或给属性赋值。
    -->
    <context:component-scan base-package="com.example.ba01"/>
</beans>

public class MyTest01 {
    @Test
    public void test01(){
        String config = "applicationContext.xml";
        ApplicationContext ctx = new ClassPathXmlApplicationContext(config);
        //从容器中获取对象
        Student student = (Student) ctx.getBean("myStudent");

        System.out.println(student);
    }
}