为什么＆QUOT; annotatedClasses＆QUOT;如果有@Entity需要的？ [英] Why is "annotatedClasses" needed if there is @Entity?

问题描述

您好我建立弹簧Hibernate应用程序。难道我真的从下面需要配置？

 ＆LT;属性名=annotatedClasses＆GT;
        ＆LT;列表＆gt;
            ＆LT; VALUE＆GT; org.fixus.springer.model.User＆LT; /值＆GT;
        ＆LT; /列表＆gt;
    ＆LT; /性＆gt;
 

我已经设置注解驱动的在我的根context.xml中

 ＆LT; MVC：注解驱动/＆GT;
＆LT;背景：组件扫描基包=org.fixus.springer/＆GT;
＆LT;背景：组件扫描基包=org.fixus.springer.model/＆GT;
 

现在不应该冬眠全自动采取一切从这个与注释@Entity包并将其转换为表？至于现在没有annotatedClasses他不会从实体创建一个表

解决方案

的使用docs,卢克！的

  

[...]例为AnnotationSessionFactoryBean bean定义：

 ＆LT;豆的id =SessionFactory的阶级=org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean＆GT;
    ＆LT;属性名=数据源REF =数据源/＆GT;
    ＆LT;属性名=annotatedClasses＆GT;
        ＆LT;列表＆gt;
            ＆LT; VALUE＆GT; test.package.Foo＆LT; /值＆GT;
            ＆LT; VALUE＆GT; test.package.Bar＆LT; /值＆GT;
        ＆LT; /列表＆gt;
    ＆LT; /性＆gt;
＆LT; /豆＆GT;
 

  

或使用类路径扫描实体类的自动检测时：

 ＆LT;豆的id =SessionFactory的阶级=org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean＆GT;
    ＆LT;属性名=数据源REF =数据源/＆GT;
    ＆LT;属性名=packagesToScanVALUE =test.package/＆GT;
＆LT; /豆＆GT;
 

正如你可以看到你定义的所有类明示或仅包扫描之间做出选择。 ＆LT;背景：组件扫描/＆GT; 不承认休眠/ JPA注解，因此没有任何影响

Hello I'm building spring-hibernate application. Do i realy need configuration from below ?

    <property name="annotatedClasses">
        <list>
            <value>org.fixus.springer.model.User</value>
        </list>
    </property>

I've set annotation-driven in my root-context.xml

<mvc:annotation-driven />
<context:component-scan base-package="org.fixus.springer" />
<context:component-scan base-package="org.fixus.springer.model" />

Now shouldn't hibernate automaticly take everything from this packages with annotation @Entity and convert it to table ? As for now without annotatedClasses he won't create a table from a entity

解决方案

Use the docs, Luke!

[...]Example for an AnnotationSessionFactoryBean bean definition:

<bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
    <property name="dataSource" ref="dataSource"/>
    <property name="annotatedClasses">
        <list>
            <value>test.package.Foo</value>
            <value>test.package.Bar</value>
        </list>
    </property>
</bean>

Or when using classpath scanning for autodetection of entity classes:

<bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
    <property name="dataSource" ref="dataSource"/>
    <property name="packagesToScan" value="test.package"/>
</bean>

As you can see you have a choice between defining all classes explicitly or only the package for scanning. <context:component-scan/> does not recognize Hibernate/JPA annotations and hence has no effect.

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