我有一個數據庫代碼jar,我用於訪問數據庫的不同應用程序。我正在使用spring data jpa
。我需要調用刷新來檢查某些其他應用程序中db中行的更改。這裏我如何實現它。 我StudentRepository
接口:彈簧數據Jpa實體無法管理刷新時出現異常
public interface StudentRepository extends JpaRepository<StudentEntity, Integer>, StudentRepositoryCustom {}
我StudentRespositoryCustom
接口
public interface StudentRepositoryCustom {
void detach(StudentEntity studentEntity);
void refresh(StudentEntity studentEntity);}
我StudentRepositoryCustomImpl
類
public class StudentRepositoryImpl implements StudentRepositoryCustom {
@PersistenceContext
EntityManager entityManager;
@Override
@Transactional
public void detach(StudentEntity studentEntity) {
entityManager.detach(studentEntity);
}
@Override
@Transactional
public void refresh(StudentEntity studentEntity) {
entityManager.refresh(studentEntity);
}}
我的測試
@Test
public void refreshTest(){
StudentEntity studentEntity = studentRepository.findOne(6);
studentRepository.refresh(studentEntity);
}
但它引發此異常:
org.springframework.dao.InvalidDataAccessApiUsageException: Entity not managed; nested exception is java.lang.IllegalArgumentException: Entity not managed
at org.springframework.orm.jpa.EntityManagerFactoryUtils.convertJpaAccessExceptionIfPossible(EntityManagerFactoryUtils.java:384)
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.translateExceptionIfPossible(AbstractEntityManagerFactoryBean.java:492)
at org.springframework.dao.support.ChainedPersistenceExceptionTranslator.translateExceptionIfPossible(ChainedPersistenceExceptionTranslator.java:59)
這條線hibernate-core-5.2.1.final
SessionImpl
類返回NULL
EntityEntry entry = persistenceContext.getEntry(object);
它應該返回的實體,我認爲。
我persistence.xml
文件
<persistence-unit name="testPersitanceUnit" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
<class>com.sample.dao.gen.StudentEntity</class>
<properties>
<property name="hibernate.archive.autodetection" value="class"/>
<property name="hibernate.show_sql" value="true"/>
<property name="hibernate.format_sql" value="true"/>
<property name="hbm2ddl.auto" value="update"/>
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5InnoDBDialect" />
<property name="hibernate.enable_lazy_load_no_trans" value="true" />
</properties>
</persistence-unit>
我的春天數據庫配置文件是
<jpa:repositories base-package="com.sample.dao.repos"
entity-manager-factory-ref="entityManagerFactory" transaction-manager-ref="transactionManager"/>
<!-- Enable the component scan (auto wiring etc) for the following package -->
<context:component-scan base-package="com.sample.dao" />
<!-- Make sure the following is specified to enable transaction -->
<tx:annotation-driven />
<bean class="org.springframework.orm.jpa.JpaTransactionManager" id="transactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>
<!-- This defines the entity manager factory with some custom properties -->
<bean id='entityManagerFactory' primary="true" class='org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean'>
<property name="persistenceUnitName" value="testPersitanceUnit"/>
<property name='dataSource' ref='dataSource' />
<property name="packagesToScan" value="com.sample.dao" />
enter code here
你忘了用'@ Service'註釋你的'StudentRepositoryCustomImpl'還是隻是一個錯字? –