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Spring IoC注解配置
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开发者只需将类告诉Spring容器，Spring容器就能完成对象创建和属性注入的工作：

- 编写XML文件，告诉Spring容器管理那些类对象
- 在类上添加注解，将其对象交由Spring容器管理

1 创建项目

IDEA
    新建项目
        Maven
            名称：AnnotationIoc
            组ID：cn.tedu
            工件ID：annotationioc
            版本：1.0.0

2 添加依赖

<dependencies>
    <!-- Spring Context -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>5.3.14</version>
    </dependency>
</dependencies>

3 实体类

在cn.tedu.annotationioc.beans包中创建Student类：

public class Student {
    private String number;
    private String name;
    private String gender;
    private int age;
    private Date enrollment;

    public String getNumber() {
        return number;
    }

    public void setNumber(String number) {
        this.number = number;
    }

    public String getName() {
        return name;
    }

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

    public String getGender() {
        return gender;
    }

    public void setGender(String gender) {
        this.gender = gender;
    }

    public int getAge() {
        return age;
    }

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

    public Date getEnrollment() {
        return enrollment;
    }

    public void setEnrollment(Date enrollment) {
        this.enrollment = enrollment;
    }

    @Override
    public String toString() {
        return "Student{" +
            "number='" + number + '\'' +
            ", name='" + name + '\'' +
            ", gender='" + gender + '\'' +
            ", age=" + age +
            ", enrollment=" + enrollment +
            '}';
    }
}

4 配置文件

在/src/main/resources目录下创建applicationContext.xml的文件：

<?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">
    <!-- 启用注解配置 -->
    <context:annotation-config />
    <!-- 指定扫描范围 -->
    <context:component-scan base-package="" />

</beans>

保存为模板。

将base-package属性设置为实体类所在包路径cn.tedu.annotationioc.beans。

<!-- 指定扫描范围 -->
<context:component-scan base-package="cn.tedu.annotationioc.beans" />

例程：AnnotationIoC