我收到错误“名为 projectPersistence 的 EntityManager 没有持久性提供程序
org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:288)
"当我在服务器上运行我的项目时。这是我的配置文件:
持久化文件
<?xml version="1.0" encoding="UTF-8"?>
<persistence:persistence version="1.0"
xmlns:persistence="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd ">
<persistence:persistence-unit name="projectPersistence"
transaction-type="RESOURCE_LOCAL">
<persistence:provider>org.hibernate.ejb.HibernatePersistence</persistence:provider>
<persistence:mapping-file>orm.xml</persistence:mapping-file>
<persistence:class>it.test.home.entity.User</persistence:class>
<persistence:properties>
<persistence:property name="hibernate.connection.driver_class"
value="com.mysql.jdbc.Driver" />
<persistence:property name="hibernate.connection.password"
value="root" />
<persistence:property name="hibernate.connection.url"
value="jdbc:mysql://localhost:3306/hibernate_db" />
<persistence:property name="hibernate.connection.username"
value="root" />
<persistence:property name="hibernate.dialect"
value="org.hibernate.dialect.MySQLDialect" />
</persistence:properties>
</persistence:persistence-unit>
</persistence:persistence>
UserDaoImpl.java
package it.test.home.dao;
// Generated 4-mar-2012 19.36.54 by Hibernate Tools 3.4.0.CR1
import it.test.home.entity.User;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* Home object for domain model class UserTable.
* @see it.test.home.entity.User
* @author Hibernate Tools
*/
@Stateless
public class UserDaoImpl implements UserDao {
private static final Log log = LogFactory.getLog(UserDaoImpl.class);
@PersistenceContext(unitName="projectPersistence")
private EntityManager entityManager;
@Override
public void persist(User transientInstance) {
log.debug("persisting UserTable instance");
try {
entityManager.persist(transientInstance);
log.debug("persist successful");
}
catch (RuntimeException re) {
log.error("persist failed", re);
throw re;
}
}
@Override
public void remove(User persistentInstance) {
log.debug("removing UserTable instance");
try {
entityManager.remove(persistentInstance);
log.debug("remove successful");
}
catch (RuntimeException re) {
log.error("remove failed", re);
throw re;
}
}
@Override
public User merge(User detachedInstance) {
log.debug("merging UserTable instance");
try {
User result = entityManager.merge(detachedInstance);
log.debug("merge successful");
return result;
}
catch (RuntimeException re) {
log.error("merge failed", re);
throw re;
}
}
@Override
public User findById( String id) {
log.debug("getting UserTable instance with id: " + id);
try {
User instance = entityManager.find(User.class, id);
log.debug("get successful");
return instance;
}
catch (RuntimeException re) {
log.error("get failed", re);
throw re;
}
}
}
projectPersistence-dao.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
<bean
class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" />
<bean class="org.springframework.orm.jpa.LocalEntityManagerFactoryBean"
id="entityManagerFactory">
<property name="persistenceUnitName" value="projectPersistence" />
</bean>
<bean class="org.springframework.orm.jpa.JpaTransactionManager"
id="transactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>
<bean autowire="byName" class="it.test.home.dao.UserDaoImpl" id="userDao">
<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>
<context:component-scan base-package="it.test.home.entity" />
<tx:annotation-driven />
</beans>
projectPersistence-enterprise.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
<import resource="projectPersistence-dao.xml" />
<context:annotation-config />
<tx:annotation-driven />
</beans>
beanRefContext.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
<bean
class="org.springframework.context.support.ClassPathXmlApplicationContext">
<constructor-arg value="classpath*:projectPersistence-enterprise.xml" />
</bean>
</beans>
servlet-context.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns="http://www.springframework.org/schema/mvc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:beans="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<!-- DispatcherServlet Context: defines this servlet's request-processing
infrastructure -->
<!-- Enables the Spring MVC @Controller programming model -->
<annotation-driven />
<!-- Handles HTTP GET requests for /resources/** by efficiently serving
up static resources in the ${webappRoot}/resources directory -->
<resources mapping="/resources/**" location="/resources/" />
<!-- Resolves views selected for rendering by @Controllers to .jsp resources
in the /WEB-INF/views directory -->
<beans:bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<beans:property name="prefix" value="/WEB-INF/views/" />
<beans:property name="suffix" value=".jsp" />
</beans:bean>
<beans:import resource="classpath*:beanRefContext.xml"/>
<context:component-scan base-package="it.test.home" />
</beans:beans>
和，UserServiceImpl.java
package it.test.home.service;
import javax.ejb.Stateless;
import javax.interceptor.Interceptors;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.ejb.interceptor.SpringBeanAutowiringInterceptor;
import org.springframework.stereotype.Service;
import it.test.home.dao.UserDao;
import it.test.home.entity.User;
@Service("userService")
@Stateless(mappedName="UserService", name="UserService")
@Interceptors(SpringBeanAutowiringInterceptor.class)
public class UserServiceImpl implements UserService {
@Autowired
private UserDao userDao;
@Override
public void persist(User transientInstance) {
userDao.persist(transientInstance);
}
@Override
public void remove(User persistentInstance) {
userDao.remove(persistentInstance);
}
@Override
public User merge(User detachedInstance) {
return userDao.merge(detachedInstance);
}
@Override
public User findById(String id) {
return userDao.findById(id);
}
}
这是我的控制台的日志:
ERROR: org.springframework.web.servlet.DispatcherServlet - Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.context.support.ClassPathXmlApplicationContext#0' defined in URL [file:/C:/Users/Giuseppe/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp2/wtpwebapps/RESTService4.0/WEB-INF/classes/beanRefContext.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [org.springframework.context.support.ClassPathXmlApplicationContext]: Constructor threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in URL [file:/C:/Users/Giuseppe/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp2/wtpwebapps/RESTService4.0/WEB-INF/classes/projectPersistence-dao.xml]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: No Persistence provider for EntityManager named projectPersistence
at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:288)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1035)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:939)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:485)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:585)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464)
at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:631)
at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:588)
at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:645)
at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:508)
at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:449)
at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:133)
at javax.servlet.GenericServlet.init(GenericServlet.java:160)
at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1266)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1185)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1080)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5015)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5302)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1568)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1558)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
我还在 Maven 依赖项中包含了 hibernate-core 和 hibernate-entitymanager，并且默认情况下，persistence.xml 包含在类路径中。
任何帮助，将不胜感激。谢谢。
最佳答案
你的persistence.xml文件在哪里？？它应该在某个 {classpath}/META-INF 目录中(例如，WEB-INF/classes/META-INF/或在你的 jar/META-INF 中)
编辑:
或者，如果您的文件在正确的位置，您的 xml 命名空间可能有问题，请尝试使用此样式 No Persistence provider for EntityManager named
关于spring - 没有命名 EntityManager 的持久性提供程序，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/9564140/