注意：这可能听起来有些重复但我从其他线程开始工作
我正在使用spring实现我自己的dao类，我无法正确配置具有休眠的spring或者其他可能的错误。
我使用基于java的配置但仍然出错。请看一看
Hibernate配置：
@Configuration
@ComponentScan("com.caveatemptor")
@EnableJpaRepositories
@EnableTransactionManagement
public class SpringDataJPAConfiguration {
private Logger LOG = LoggerFactory.getLogger(SpringDataJPAConfiguration.class);
// @Bean(destroyMethod = "close")
// public BasicDataSource dataSource() {
// BasicDataSource basicDataSource = new BasicDataSource();
// basicDataSource.setDriverClassName("com.mysql.jdbc.Driver");
// basicDataSource.setUrl("jdbc:mysql://localhost/ce");
// basicDataSource.setUsername("root");
// basicDataSource.setPassword("root");
// basicDataSource.setInitialSize(1);
// basicDataSource.setMaxIdle(5);
// basicDataSource.setMaxOpenPreparedStatements(10);
// LOG.debug("+++++++++++++Datasource Configured");
// return basicDataSource;
// }
@Bean
public DriverManagerDataSource dataSource() {
DriverManagerDataSource basicDatasource = new DriverManagerDataSource();
basicDatasource.setDriverClassName("com.mysql.jdbc.Driver");
basicDatasource.setUrl("jdbc:mysql://localhost/ce");
basicDatasource.setUsername("root");
basicDatasource.setPassword("root");
LOG.debug("+++++++++++++Datasource Configured");
return basicDatasource;
}
// @Bean
// public LocalContainerEntityManagerFactoryBean entityManager() {
// LocalContainerEntityManagerFactoryBean bean = new
// LocalContainerEntityManagerFactoryBean();
// bean.setDataSource(this.dataSource());
// bean.setLoadTimeWeaver(this.instrumentationLoadTimeWeaver());
// bean.setJpaProperties(this.jpaProperties());
// bean.setJpaVendorAdapter(this.vendorAdapter());
// bean.setPersistenceProviderClass(HibernatePersistenceProvider.class);
// bean.setPackagesToScan("com.caveatemptor.core");
// bean.setPersistenceUnitName("jpwh");
// LOG.info("==================[Entity Manage Configured]==================");
// return bean;
// }
@Bean
public HibernateJpaVendorAdapter vendorAdapter() {
HibernateJpaVendorAdapter adapter = new HibernateJpaVendorAdapter();
adapter.setShowSql(true);
adapter.setGenerateDdl(true);
LOG.info("==================[Hibernate Jpa Vendor Configured]==================");
return adapter;
}
@Bean
public PlatformTransactionManager transactionManager() {
JpaTransactionManager jpaTransactionManager = new JpaTransactionManager();
jpaTransactionManager.setDataSource(this.dataSource());
jpaTransactionManager.setJpaProperties(this.jpaProperties());
// jpaTransactionManager.setEntityManagerFactory(this.entityManager().getObject());
return jpaTransactionManager;
}
@Bean
public InstrumentationLoadTimeWeaver instrumentationLoadTimeWeaver() {
return new InstrumentationLoadTimeWeaver();
}
public Properties jpaProperties() {
Properties properties = new Properties();
properties.setProperty("hibernate.hbm2ddl.auto", "create");
properties.setProperty("hibernate.dialect", "org.hibernate.dialect.MySQL5InnoDBDialect");
properties.setProperty("hibernate.show_sql", "true");
properties.setProperty("hibernate.format_sql", "true");
properties.setProperty("hibernate.ejb.naming_strategy", "org.hibernate.cfg.DefaultNamingStrategy");
properties.setProperty("hibernate.order_by.default_null_ordering", "first");
LOG.info("==================[JPA Properties Configured]==================");
return properties;
}
@Bean
public SessionFactory sessionFactory() {
LocalSessionFactoryBuilder bean = new LocalSessionFactoryBuilder(this.dataSource());
bean.setProperties(this.jpaProperties());
bean.addPackage("com.ceveatemptor");
LOG.info("Session Factory Configured+++++++++++++++++++");
return bean.buildSessionFactory();
}
}
这是一个使用maven的多模块项目，因此它在Web模块中配置为：
public class DispatcherServletInitConfiguration extends AbstractAnnotationConfigDispatcherServletInitializer {
@Override
protected Class<?>[] getRootConfigClasses() {
return new Class[] { SpringDataJPAConfiguration.class };
}
@Override
protected Class<?>[] getServletConfigClasses() {
return new Class[] { WebServletInitConfiguration.class };
}
@Override
protected String[] getServletMappings() {
return new String[] { "/" };
}
}
通用DAO类：
public abstract class GenericDAOImpl<T, ID extends Serializable> implements GenericDAO<T, ID> {
@PersistenceContext
protected EntityManager em;
protected final Class<T> entityClass;
public GenericDAOImpl(Class<T> entityClass) {
this.entityClass = entityClass;
}
@Override
public T makePersistent(T entity) {
return em.merge(entity);
}
}
由于大多数线程提到我需要@Transactional，这里是实现
@Repository
@Transactional
@javax.transaction.Transactional
public class ItemDAOImpl extends GenericDAOImpl<Item, Long> implements ItemDAO {
public ItemDAOImpl() {
super(Item.class);
}
}
Stacktrace：
Sep 02, 2017 11:30:22 AM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [dispatcher] in context with path [/portal] threw exception [Request processing failed; nested exception is javax.persistence.TransactionRequiredException: No EntityManager with actual transaction available for current thread - cannot reliably process 'merge' call] with root cause
javax.persistence.TransactionRequiredException: No EntityManager with actual transaction available for current thread - cannot reliably process 'merge' call
at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:282)
at com.sun.proxy.$Proxy77.merge(Unknown Source)
at com.caveatemptor.core.dao.GenericDAOImpl.makePersistent(GenericDAOImpl.java:53)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:333)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
at com.sun.proxy.$Proxy79.makePersistent(Unknown Source)
at com.caveatemptor.web.controllers.ItemController.saveItem(ItemController.java:38)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:661)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:624)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:799)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1455)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
这可能是typo或某些主要配置错误，我没有得到它。
任何洞察力都会有所帮助。
编辑1：如果您需要任何其他信息，请告知我们。
编辑2 即使是要更改hibernate / jpa模块的整个配置，我也会接受各种建议。但只有基于Java /注释的配置
编辑3 我通过将服务器从tomcat迁移到wildfly并配置了JNDI数据源解决了问题，现在它正常运行。