关于jpa:jpa自定义修改

当执行须要自定义批改得时候

@Modifying//update和delete的时候必须标@Query(value = "update mic_line set rod_no=?1 where line_no=?2",nativeQuery = true)void updateRod(String rodNo,String lineNo);

Spring JPA报错：InvalidDataAccessApiUsageException: Executing an update/delete query
集成Spring JPA，在执行delete，update时须要增加事务。

错误信息：

org.springframework.dao.InvalidDataAccessApiUsageException: Executing an update/delete query; nested exception is javax.persistence.TransactionRequiredException: Executing an update/delete queryat org.springframework.orm.jpa.EntityManagerFactoryUtils.convertJpaAccessExceptionIfPossible(EntityManagerFactoryUtils.java:402)at org.springframework.orm.jpa.vendor.HibernateJpaDialect.translateExceptionIfPossible(HibernateJpaDialect.java:255)at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.translateExceptionIfPossible(AbstractEntityManagerFactoryBean.java:527)at org.springframework.dao.support.ChainedPersistenceExceptionTranslator.translateExceptionIfPossible(ChainedPersistenceExceptionTranslator.java:61)at org.springframework.dao.support.DataAccessUtils.translateIfNecessary(DataAccessUtils.java:242)at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:153)at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)

解决：通过增加注解@Transactional

@Transactional@Modifying//update和delete的时候必须标@Query(value = "update mic_line set rod_no=?1 where line_no=?2",nativeQuery = true)    void updateRod(String rodNo,String lineNo);

留神，增加的是import org.springframework.transaction.annotation.Transactional。