4.Spring的三种实例化Bean的方式

最新推荐文章于 2024-05-06 22:27:17 发布

最新推荐文章于 2024-05-06 22:27:17 发布 · 152 阅读

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#Bean #Spring #Java

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本文详细介绍了Spring框架中三种不同的实例化方式：类构造器实例化、静态工厂方法实例化及实例工厂方法实例化，并提供了具体的代码实现示例。

1.使用类构造器实例化

<bean id="personService" class="com.spring.service.impl.PersonServiceBean"></bean>

2.使用静态工厂方法实例化

<bean id="personService" class="com.spring.service.impl.PersionServiceBeanFactory" factory-method="createPersonServiceBean"></bean>


package com.spring.service.impl;
import com.spring.service.PersonService;
public class PersionServiceBeanFactory
{
    public static PersonService createPersonServiceBean()
    {
        return new PersonServiceBean();
    }
}

3.使用实例工厂方法实例化

<bean id="personServiceFactory" class="com.spring.service.impl.PersionServiceBeanFactory"></bean>     

<bean id="personService" factory-bean="personServiceFactory" factory-method="createPersonServiceBean"></bean>

package com.spring.service.impl;
import com.spring.service.PersonService;
public class PersionServiceBeanFactory
{
    public PersonService createPersonServiceBean()
    {
        return new PersonServiceBean();
    }
}