Spring中Bean实例化的三种方式-优快云博客

本文链接：https://blog.youkuaiyun.com/NEW_BUGGER/article/details/106359352

本文探讨了Spring框架中创建Bean的三种主要方法，包括使用XML配置、注解驱动实例化以及Java配置类。详细解释了每种方式的工作原理、优缺点，并提供了相应的示例代码，帮助读者深入理解Spring Bean的生命周期和管理。

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参考文章：忘记了

1、构造方法
<bean id="person" class="com.dfdc.spring.demo.Person"></bean>
<bean id="personWithParam" class="com.dfdc.spring.demo.Person">
    <constructor-arg name="name" value="等风的草"/>
</bean>
<bean id="personWirhParams" class="com.dfdc.spring.demo.Person">
        <constructor-arg name="name" value="等风的草"/>
        <constructor-arg name="age" value="21"/>
</bean>
</beans>

2、静态工厂
<bean id="personStaticFactory" class="com.dfdc.spring.demo.PersonStaticFactory" factory-method="createInstance"/>
<bean id="personStaticFactoryWithParam" class="com.dfdc.spring.demo.PersonStaticFactory" factory-method="createInstance">
    <constructor-arg name="name" value="等风的草"/>
</bean>
<bean id="personStaticFactoryParams" class="com.dfdc.spring.demo.PersonStaticFactory" factory-method="createInstance">
    <constructor-arg name="name" value="等风的草"/>
    <constructor-arg name="age" value="21"/>
</bean>


3、<!--实例化工厂实例化bean  -->
<bean id="instancefactory" class="com.dfdc.spring.demo.InstanceFactory"/>
<bean id="personInstance" factory-bean="instancefactory" factory-method="createInstance"/>

<bean id="personInstanceWithParam" factory-bean="instancefactory" factory-method="createInstance">
    <constructor-arg name="name" value="等风的草"/>
</bean>
<bean id="personInstanceWithParams" factory-bean="instancefactory" factory-method="createInstance">
    <constructor-arg name="name" value="等风的草"/>
    <constructor-arg name="age" value="21"/>
</bean>