Spring框架的bean factory

1、bean factory
(1)依赖：

<dependency>
	<groupId>org.springframework</groupId>
	<artifactId>spring-context</artifactId>
	<version>5.2.6.RELEASE</version>
</dependency>

(2)对象托管
(3)配置文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

    <!--调用无参构造，反射调用setter注入值  默认为单例模式  动态注入默认根据类型-->
    <bean id="stu" class="cn.kgc.kb08.spring.entity.Student" autowire="byType" scope="singleton">
        <property name="age" value="18"/>
        <property name="name" value="张三"/>
        <property name="gender" value="男"/>
    </bean>

    <!--通过带参构造创建对象-->
    <bean id="stu2" class="cn.kgc.kb08.spring.entity.Student">
        <constructor-arg index="0" value="Henry"/>
        <constructor-arg index="1" value="22"/>
        <constructor-arg index="2" value="女"/>
    </bean>

    <!--通过工厂创建对象-->
    <bean id="stuFactroy" class="cn.kgc.kb08.spring.factory.StudentFactory"/>
    <bean id="stu3" class="cn.kgc.kb08.spring.entity.Student" factory-bean="stuFactroy" factory-method="get"/>

    <bean id="config" class="cn.kgc.kb08.spring.dao.SqlConfig">
        <property name="driver" value=""/>
        <property name="url" value=""/>
        <property name="username" value=""/>
        <property name="password" value=""/> <!--基本类型：value-->
    </bean>

    <bean id="baseDao" class="cn.kgc.kb08.spring.dao.BaseDao">
        <constructor-arg index="0" ref="config"/> <!--应用类型：ref-->
    </bean>
</beans>