Spring Hibernate 类映射问题

【问题标题】：Spring Hibernate Class mapping issueSpring Hibernate 类映射问题
【发布时间】：2012-01-22 11:04:42
【问题描述】：

我只是在学习 mkyong 教程。并升级教程以使用 Spring3 和 hibernate 3.6.9 的注释。旧版本有效，但经过我的修改，我收到了这个错误

org.springframework.orm.hibernate3.HibernateQueryException: Customer is not mapped [from Customer]; nested exception is org.hibernate.hql.ast.QuerySyntaxException: Customer is not mapped [from Customer]
    at org.springframework.orm.hibernate3.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:664)
    at org.springframework.orm.hibernate3.HibernateAccessor.convertHibernateAccessException(HibernateAccessor.java:412)
    at org.springframework.orm.hibernate3.HibernateTemplate.doExecute(HibernateTemplate.java:411)
    at org.springframework.orm.hibernate3.HibernateTemplate.executeWithNativeSession(HibernateTemplate.java:374)
    at org.springframework.orm.hibernate3.HibernateTemplate.find(HibernateTemplate.java:912)
    at org.springframework.orm.hibernate3.HibernateTemplate.find(HibernateTemplate.java:904)
    at com.mkyong.customer.dao.impl.CustomerDaoImpl.findAllCustomer(CustomerDaoImpl.java:37)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:318)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
    at $Proxy10.findAllCustomer(Unknown Source)
    at com.mkyong.customer.bo.impl.CustomerBoImpl.findAllCustomer(CustomerBoImpl.java:30)
    at com.mkyong.CustomerBean.getCustomerList(CustomerBean.java:29)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at javax.el.BeanELResolver.invoke(BeanELResolver.java:470)
    at javax.el.CompositeELResolver.invoke(CompositeELResolver.java:161)
    at org.apache.el.parser.AstValue.getValue(AstValue.java:159)
    at org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:189)
    at com.sun.faces.facelets.el.TagValueExpression.getValue(TagValueExpression.java:106)
    at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:190)
    at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:178)
    at javax.faces.component.UIData.getValue(UIData.java:553)
    at javax.faces.component.UIData.getDataModel(UIData.java:1293)
    at javax.faces.component.UIData.setRowIndex(UIData.java:446)
    at com.sun.faces.renderkit.html_basic.TableRenderer.encodeBegin(TableRenderer.java:77)
    at javax.faces.component.UIComponentBase.encodeBegin(UIComponentBase.java:824)
    at javax.faces.component.UIData.encodeBegin(UIData.java:936)
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1661)
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1666)
    at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:389)
    at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:127)
    at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:117)
    at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:97)
    at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:135)
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:335)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:405)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:964)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:515)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:680)
Caused by: org.hibernate.hql.ast.QuerySyntaxException: Customer is not mapped [from Customer]
    at org.hibernate.hql.ast.util.SessionFactoryHelper.requireClassPersister(SessionFactoryHelper.java:180)
    at org.hibernate.hql.ast.tree.FromElementFactory.addFromElement(FromElementFactory.java:111)
    at org.hibernate.hql.ast.tree.FromClause.addFromElement(FromClause.java:93)
    at org.hibernate.hql.ast.HqlSqlWalker.createFromElement(HqlSqlWalker.java:327)
    at org.hibernate.hql.antlr.HqlSqlBaseWalker.fromElement(HqlSqlBaseWalker.java:3441)
    at org.hibernate.hql.antlr.HqlSqlBaseWalker.fromElementList(HqlSqlBaseWalker.java:3325)
    at org.hibernate.hql.antlr.HqlSqlBaseWalker.fromClause(HqlSqlBaseWalker.java:733)
    at org.hibernate.hql.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:584)
    at org.hibernate.hql.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:301)
    at org.hibernate.hql.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:244)
    at org.hibernate.hql.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:256)
    at org.hibernate.hql.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:187)
    at org.hibernate.hql.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:138)
    at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:101)
    at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:80)
    at org.hibernate.engine.query.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:124)
    at org.hibernate.impl.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:156)
    at org.hibernate.impl.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:135)
    at org.hibernate.impl.SessionImpl.createQuery(SessionImpl.java:1770)
    at org.springframework.orm.hibernate3.HibernateTemplate$30.doInHibernate(HibernateTemplate.java:914)
    at org.springframework.orm.hibernate3.HibernateTemplate$30.doInHibernate(HibernateTemplate.java:1)
    at org.springframework.orm.hibernate3.HibernateTemplate.doExecute(HibernateTemplate.java:406)

我的代码和映射文件如下

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_1_0.xsd"
        version="1.0">

    <persistence-unit name="testa" transaction-type="RESOURCE_LOCAL">
        <class>com.mkyong.customer.model.Customer</class>
    </persistence-unit>
</persistence>

实体类

package com.mkyong.customer.model;

import java.io.Serializable;
import java.util.Date;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name = "customer")
public class Customer implements Serializable {

    /**
     * 
     */
    private static final long serialVersionUID = 1L;
    @Id
    @Column(name = "CUSTOMER_ID")
    public long customerId;

    @Column(name = "NAME")
    public String name;

    @Column(name = "ADDRESS")
    public String address;

    @Column(name = "CREATED_DATE")
    public Date createdDate;

// getters setters below 
}

DAO 

package com.mkyong.customer.dao.impl;

import java.util.Date;
import java.util.List;

import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.orm.hibernate3.HibernateTemplate;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;

import com.mkyong.customer.dao.CustomerDao;
import com.mkyong.customer.model.Customer;

@Repository("customerDao")
@Transactional
public class CustomerDaoImpl implements CustomerDao {

    private HibernateTemplate hibernateTemplate;

    @Autowired
    public void setSessionFactory(SessionFactory sessionFactory) {
        hibernateTemplate = new HibernateTemplate(sessionFactory);
    }


    public void addCustomer(Customer customer) {

        customer.setCreatedDate(new Date());
        hibernateTemplate.saveOrUpdate(customer);

    }

    public List<Customer> findAllCustomer() {
                //This throws error
        return hibernateTemplate.find("from Customer");

    }
}

应用程序上下文

<?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:p="http://www.springframework.org/schema/p"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="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  http://www.springframework.org/schema/tx  http://www.springframework.org/schema/tx/spring-tx-3.0.xsd  http://www.springframework.org/schema/aop  http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">

    <!-- holding properties for database connectivity / -->
    <import resource="classes/config/spring/beans/DataSource.xml" />
    <!-- <import resource="classes/config/spring/beans/HibernateSessionFactory.xml"/> -->
    <!-- enabling annotation driven configuration / -->
    <context:annotation-config />
    <context:component-scan base-package="com.mkyong" />
    <tx:annotation-driven transaction-manager="transactionManager" />

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

    <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager"
        p:entityManagerFactory-ref="entityManagerFactory" />

    <bean id="sessionFactory"
        class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
        <property name="dataSource">
            <ref bean="dataSource" />
        </property>
        <property name="packagesToScan" value="org.adit.spring.hibernate.entity" />
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
                <prop key="hibernate.hbm2ddl.auto">create</prop>
                <!-- uncomment this for first time run -->
                <prop key="hibernate.hbm2ddl.auto">false</prop>
                <prop key="hibernate.show_sql">true</prop>
            </props>
        </property>
    </bean>

    <bean id="entityManagerFactory"
        class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"
        p:dataSource-ref="dataSource" p:jpaVendorAdapter-ref="jpaAdapter">
        <property name="loadTimeWeaver">
            <bean
                class="org.springframework.instrument.classloading.InstrumentationLoadTimeWeaver" />
        </property>
        <property name="persistenceUnitName" value="testa"></property>
    </bean>

    <bean id="jpaAdapter"
        class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"
        p:database="MYSQL" p:showSql="true" />
</beans>

datasource.xml

<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-2.5.xsd">

 <bean 
   class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
   <property name="location">
        <value>WEB-INF/classes/config/database/db.properties</value>
   </property>
</bean>

  <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
    <property name="driverClassName" value="${jdbc.driverClassName}" />
    <property name="url" value="${jdbc.url}" />
    <property name="username" value="${jdbc.username}" />
    <property name="password" value="${jdbc.password}" />
  </bean>

</beans>

【问题讨论】：

  • 你的文件真的命名为persistance.xml吗？它必须是 persistence.xml。
  • 命名正确。抱歉将编辑问题。

标签： java hibernate spring hibernate-mapping


【解决方案1】：

如果您向我们展示了 spring context.xml 文件，将会有所帮助。但奇怪的是你使用了一个 persistence.xml 文件，我表明你想使用 JPA，但是你的 DAO 不使用 JPA：它使用的是本地 Hibernate API。

我的猜测是会话工厂配置不正确，因为您假设它会自动读取 persistence.xml 文件，如果您不将 Hibernate 配置为 JPA 实体管理器，则不会出现这种情况。

编辑：

您在 XML 中声明了一个会话工厂，但它扫描包 org.adit.spring.hibernate.entity 中的类，该包不是您的客户实体的包。而且你想使用 JPA，所以这个会话工厂 bean 定义不应该存在。

您想使用 JPA API，因此您必须在 DAO 中注入实体管理器，而不是注入会话工厂。由于您对 bean entityManagerFactory 的定义，这种注入是可能的。

将您的 DAO 代码更改为以下内容：

@Repository("customerDao")
@Transactional
public class CustomerDaoImpl implements CustomerDao {

    @PersistenceContext
    private EntityManager em;

    public void addCustomer(Customer customer) {
        customer.setCreatedDate(new Date());
        em.persist(customer);
    }

    public List<Customer> findAllCustomer() {
        TypedQuery<Customer> query = em.createQuery("select c from Customer c", Customer.class);
        return query.getResultList();
    }
}

阅读http://static.springsource.org/spring/docs/3.1.x/spring-framework-reference/htmlsingle/spring-framework-reference.html#orm-jpa 了解更多信息。

【讨论】：

  • 已添加。我知道我迷路了。是的，我想使用 jpa。谢谢。
【解决方案2】：

如果您打算使用 Hibernate 作为 JPA 实现（从您的配置来看），您应该使用 JpaTemplate 而不是 HibernateTemplate。但是，自 Spring 3.1 起，JpaTemplate 已被弃用，您应该使用 EntityManager-reference 创建您的 DAO：

已弃用。从 Spring 3.1 开始，支持原生 EntityManager 使用 （一般通过@PersistenceContext获取）注意这个类 没有升级到 JPA 2.0，以后也不会。

@PersistenceContext
private EntityManager entityManager;

【讨论】：

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