建设营销网站要什么,做网站没有数据库,黄页是干什么用的,做一电影网站怎么赚钱1#xff09; 使用无参构造方法实例化
它会根据默认无参构造方法来创建类对象#xff0c;如果bean中没有默认无参构造函数#xff0c;将会创建失败
?xml version1.0 encodingUTF-8?
beans xmlnshttp://www.springframework.o…1 使用无参构造方法实例化
它会根据默认无参构造方法来创建类对象如果bean中没有默认无参构造函数将会创建失败
?xml version1.0 encodingUTF-8?
beans xmlnshttp://www.springframework.org/schema/beansxmlns:xsihttp://www.w3.org/2001/XMLSchema-instancexsi:schemaLocationhttp://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
bean idimpl classcom.Impl/bean
/beans2 工厂静态方法实例化
工厂的静态方法返回Bean实例
?xml version1.0 encodingUTF-8?
beans xmlnshttp://www.springframework.org/schema/beansxmlns:xsihttp://www.w3.org/2001/XMLSchema-instancexsi:schemaLocationhttp://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
bean idimpl classcom.StaticFactoryBean factory-methodcreate/bean
/beanspublic class StaticFactoryBean {public static ImplDao create(){return new ImplDao();}
}
3 工厂实例方法实例化
工厂的非静态方法返回Bean实例
public class DynamicFactoryBean {public ImplDao create(){return new ImplDao();}
}
?xml version1.0 encodingUTF-8?
beans xmlnshttp://www.springframework.org/schema/beansxmlns:xsihttp://www.w3.org/2001/XMLSchema-instancexsi:schemaLocationhttp://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsdbean idfactoryBean classcom.DynamicFactoryBean/bean idimpl factory-beanfactoryBean factory-methodcreate/
/beans
