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@Entity注释的bean的某种自动检测，但我无法弄清楚如何。你如何做而不是将每个bean列在persistence.xml中的 class XML元素中？

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

从Spring 3.1开始，您还可以选择完全忘记persistence.xml ，并配置 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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