如何在 JPA 2.0 中自动检测实体 [英] How to auto detect entities in JPA 2.0

问题描述

我很确定我过去在 JPA 2.0 中使用了某种用 @Entity 注释的 bean 的某种自动检测，但我无法找到方法.您如何做到这一点而不是在persistence.xml 的class XML 元素中列出每个bean?

I am pretty sure that I used some sort of auto detection of beans annotated with @Entity in JPA 2.0 in the past but I am not able to find out how. How do you do that instead of listing each bean in a class XML element in the persistence.xml?

推荐答案

自 Spring 3.1 起，您还可以选择 完全忘记persistence.xml，并配置您的EntityManagerFactory 使用 packagesToScan 属性，类似于:

Since Spring 3.1, you also have the option to forget persistence.xml altogether, and configure your EntityManagerFactory using the packagesToScan property, similar to this:

<bean id="entityManagerFactory" 
      class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"
      p:dataSource-ref="dataSource"
      p:packagesToScan="${jpa.entity.packages}">

    <property name="jpaVendorAdapter">
        <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"
              p:showSql="${hibernate.show_sql}"/>
    </property>

    <property name="jpaProperties">
        <props>
            <prop key="hibernate.format_sql">${hibernate.format_sql}</prop>
            <prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop>
        </props>
    </property>
</bean>

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