问题描述
我需要在我的Spring 3.0应用程序中显示自定义消息。我有一个数据库与Hibernate有几个约束。我有疑问，应该如何处理好 DataIntegrityViolationException 。我想知道是否有一种方法来将异常与属性文件中的消息集进行映射，因为在约束验证中是可能的。我可以以任何方式自动处理它，或者我必须在每个控制器中捕获此异常。
I need to show custom messages in my Spring 3.0 application. I have a database with Hibernate and there are several constraints. I have doubts in how DataIntegrityViolationException should be handled in a good way. I wonder if there is a way to map the exception with a message set in a properties file, as it is possible in Constraints validation. Could I handle it automatically in any way or I have to catch this exception in each controller?
推荐答案
在约束违规的情况下，友好的消息是，当Hibernate的 ConstraintViolationException 被翻译成Spring的 DataIntegrityViolationException 时，约束名称将丢失。
The problem with showing user-friendly messages in the case of constraint violation is that the constraint name is lost when Hibernate's ConstraintViolationException is being translated into Spring's DataIntegrityViolationException.
但是，您可以自定义此翻译逻辑。如果您使用 LocalSessionFactoryBean 访问Hibernate，则可以使用自定义的 SQLExceptionTranslator （请参阅 LocalSessionFactoryBean.jdbcExceptionTranslator ）。此异常翻译器可以将 ConstraintViolationException 转换为您自己的异常类，保留约束名称。
However, you can customize this translation logic. If you use LocalSessionFactoryBean to access Hibernate, you can supply it with a custom SQLExceptionTranslator (see LocalSessionFactoryBean.jdbcExceptionTranslator). This exception translator can translate a ConstraintViolationException into your own exception class, preserving the constraint name.
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