无法在hibernate中使用jpa创建实体管理器工厂

我正在使用jpa、hibernate和eclipse构建一个SpringMVC应用程序。以下是我的控制器：

package com.something.controller;

import java.util.ArrayList;
import java.util.List;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import javax.persistence.TypedQuery;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseStatus;
import org.springframework.web.bind.annotation.RestController;

import com.drc.model.Project;
import com.drc.service.ProjectService;

@RestController("projectController")
@RequestMapping("/project")
public class ProjectController {

    @Autowired
    private ProjectService projectService;

    @RequestMapping(value = "/{projectName}", method = RequestMethod.GET)
    public String createProject (@PathVariable String projectName)
    {

        EntityManagerFactory emf = Persistence.createEntityManagerFactory("punit");
        EntityManager em = emf.createEntityManager();       
        TypedQuery<Project> query= em.createQuery("from project where name=:projectName",Project.class);
        List<Project> results= query.getResultList();

         if(results.size()>0)
         {
             return "there are entries";

         }

         else
         {
             return "there are no entries";
         }


    }

这是我的jpaContext.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"
    xmlns:jpa="http://www.springframework.org/schema/data/jpa"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa-1.3.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">

    <context:annotation-config />
    <context:component-scan base-package="com.drc" />

    <jpa:repositories base-package="com.drc.repository"/>

    <bean
        class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" />

    <bean id="entityManagerFactory"
        class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
        <property name="persistenceUnitName" value="punit" />
        <property name="dataSource" ref="dataSource" />
        <property name="jpaVendorAdapter">
            <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
                <property name="showSql" value="true" />
            </bean>
        </property>

        <property name="jpaPropertyMap">
            <map>
                <entry key="hibernate.dialect" value="org.hibernate.dialect.MySQL5InnoDBDialect"></entry>
                <entry key="hibernate.hbm2ddl.auto" value="update" />
                <entry key="hibernate.format_sql" value="true" />
            </map>
        </property>
    </bean>

    <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
        <property name="entityManagerFactory" ref="entityManagerFactory" />
    </bean>

    <tx:annotation-driven transaction-manager="transactionManager" />

    <bean id="dataSource"
        class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver" />
        <property name="url"
            value="jdbc:mysql://localhost:3306/apecadprojects?autoReconnect=true" />
        <property name="username" value="root" />
        <property name="password" value="root" />
    </bean>

</beans>



Whenever i browse to the page say localhost:8080/projectname/project/myname i get the following error

正如您所见，它不允许我创建EntityManagerFactory。为什么

下面是我的persistence.xml

<persistence xmlns="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_2_0.xsd" version="2.0">

    <persistence-unit name="punit">
    <provider>org.hibernate.jpa.PersistenceProvider</provider>

    </persistence-unit>
</persistence>

我做错了什么

更新Ok now在尝试了几个小时后现在我得到了以下错误，请有人指出问题出在哪里？？我的hql错了吗

---

确保persistence.xml位于类路径的META-INF目录中。

看起来您没有在持久性xml中添加类名

将其添加到持久性xml中

<class>yourpackage.Project</class>

在您的Entity manager bean中添加proeprity

<property name="persistenceXmlLocation" value="classpath:META-INF/persistence.xml" />

---

首先，我要做的是将REST控制器与您的存在性解耦，以尽可能减少可能会妨碍它更好的设计、更模块化、更易于测试等的变量。。不管怎么说，多次创建EntityManager没有多大意义，尤其不是在每次客户端请求时。这只是测试代码……。我不打算每次客户端请求时都创建它……。可能缺少提供程序？类路径中是否存在org.hibernate.jpa.PersistenceProvider？Shaprio…….我在春季是个新手…你的意思是它应该在hibernate实体管理器jar中的maven Dependencies中吗？如果你想使用hibernate作为你的jpa提供程序，你必须在pom.xml中有所需的jar。此外，如果您正在集成Spring和JPA，我不认为您需要自己创建EntityManager，而是使用@PersistenceContext并让Spring将其注入到您的类中。有很多这样做的指南，请查看这一条：添加第一行后，它会说Class package.projectname无法解析请确保提供了整个包的名称。。com.drc.model.project应该在里面添加这个类nope不起作用，仍然得到相同的错误…….这个类无法解决，很抱歉出现了问题，但是我需要在persistence.xml org.hibernate.ejb.HibernatePersistence中添加以下行，它起作用了。。。。。。无论如何，感谢你们的帮助，我的hql查询是错误的……这就是为什么我得到语法异常错误的原因……。解决了它