在Spring中将PersistenceException转换为DataAccessException

问题描述

我正在尝试在Spring + JPA + Hibernate环境中处理唯一的键约束违规.

I'm trying to handle unique key constraint violations in a Spring + JPA + Hibernate environment.

我使用PersistenceExceptionTranslationPostProcessor将PersistenceException转换为DataAccessException.当发生唯一的键约束冲突时，我希望抛出一个DuplicateKeyException或一个DataIntegrityViolationException，但是我得到的只是一个包裹了PersistenceException的JpaSystemException.

I use PersistenceExceptionTranslationPostProcessor to translate a PersistenceException to a DataAccessException. When there's a unique key constraint violation, I'd expect a DuplicateKeyException or a DataIntegrityViolationException thrown, but all I get is a JpaSystemException that wraps a PersistenceException.

使用DataAccessException层次结构的全部意义不是很细致，而不必查找特定于供应商的错误代码吗?

Isn't the whole point of using the DataAccessException hierarchy that it's fine-grained enough not to have to look up the vendor-specific error code?

我如何让Spring将PersistenceException转换为更具体的DataAccessException?

How do I have Spring translate a PersistenceException to a more specific DataAccessException ?

我注意到DataAccessUtils.translateIfNecessary()中的this.jpaDialect为空.我需要配置一些设置以将this.jpaDialect设置为HibernateJpaDialect吗?

I noticed that this.jpaDialect in DataAccessUtils.translateIfNecessary() is null. Is there some setting I need to configure to set this.jpaDialect to HibernateJpaDialect?

谢谢！

推荐答案

显然您没有设置jpaDialect.对于Hibernate，它应如下所示:

Apparently you don't have jpaDialect set. For Hibernate it should look like this:

<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
    <property name="jpaVendorAdapter">
        <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"/>
    </property>
    <!-- ... -->
</bean>

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