Question

我正在使用hibernate 4.1.5.Final和Spring 3.1.2 Release以及Jboss 7.1。我已经使用@NamedQuery注释在类中编写了所有命名查询，但实体管理器没有创建命名查询。我发布了stacktrace和context.xml

  09:58:49,695 ERROR [stderr] (http-localhost-127.0.0.1-8080-2) java.lang.IllegalArgumentException: Named query not found: validateLoginHash
    09:58:49,770 ERROR [stderr] (http-localhost-127.0.0.1-8080-2)   at org.hibernate.ejb.AbstractEntityManagerImpl.createNamedQuery(AbstractEntityManagerImpl.java:642)
    09:58:49,772 ERROR [stderr] (http-localhost-127.0.0.1-8080-2)   at sun.reflect.GeneratedMethodAccessor14.invoke(Unknown Source)
    09:58:49,774 ERROR [stderr] (http-localhost-127.0.0.1-8080-2)   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    09:58:49,777 ERROR [stderr] (http-localhost-127.0.0.1-8080-2)   at java.lang.reflect.Method.invoke(Method.java:597)
    09:58:49,779 ERROR [stderr] (http-localhost-127.0.0.1-8080-2)   at org.springframework.orm.jpa.ExtendedEntityManagerCreator$ExtendedEntityManagerInvocationHandler.invoke(ExtendedEntityManagerCreator.java:365)

    09:58:49,782 ERROR [stderr] (http-localhost-127.0.0.1-8080-2)   at $Proxy30.createNamedQuery(Unknown Source)

    09:58:49,784 ERROR [stderr] (http-localhost-127.0.0.1-8080-2)   at sun.reflect.GeneratedMethodAccessor14.invoke(Unknown Source)

    09:58:49,785 ERROR [stderr] (http-localhost-127.0.0.1-8080-2)   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

    09:58:49,788 ERROR [stderr] (http-localhost-127.0.0.1-8080-2)   at java.lang.reflect.Method.invoke(Method.java:597)

    09:58:49,790 ERROR [stderr] (http-localhost-127.0.0.1-8080-2)   at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:240)

    09:58:49,793 ERROR [stderr] (http-localhost-127.0.0.1-8080-2)   at $Proxy30.createNamedQuery(Unknown Source)

的applicationContext.xml

<bean id="jpaDialect" class="org.springframework.orm.jpa.vendor.HibernateJpaDialect"/> 
    <bean id="entityManagerFactory"
        class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">


        <property name="dataSource" ref="dataSource" />
        <property name="jpaDialect" ref="jpaDialect"/>
        <property name="packagesToScan" value="com.project.entities"/> 


        <property name="jpaVendorAdapter">
            <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">          
                <property name="showSql" value="false" />
                <property name="generateDdl" value="false" />
                <property name="databasePlatform" value="org.hibernate.dialect.MySQLDialect" />
            </bean>
        </property>

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

        <property name="loadTimeWeaver">
            <bean
                class="org.springframework.instrument.classloading.InstrumentationLoadTimeWeaver" />
        </property>

    </bean>

     <bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean">
        <property name="jndiName" value="java:jboss/datasources/MySqlDS"/>
    </bean>


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

JPA-的persistence.xml

<persistence>
    <persistence-unit name="Project" transaction-type="RESOURCE_LOCAL" >


        <provider>org.hibernate.ejb.HibernatePersistence</provider>
         <non-jta-data-source>java:jboss/datasources/MySqlDS</non-jta-data-source>
<!--         <properties>  -->
<!--           <property name="jboss.as.jpa.providerModule" value="hibernate3-bundled" />        -->
<!--           </properties>          -->

    </persistence-unit>

</persistence>

DBNamedQuery.java

@Entity
@NamedQueries( {

@NamedQuery(name = ... , query = ... ),
@NamedQuery(name = ..., query = ...),

.....More named queries

})

public class DBNamedQuery {


}

Answer 1

I have written all named queries in a class with @NamedQuery annotation

您没有清楚地提到您在上述声明中提到的班级类型？您需要在Entity类中编写命名查询（使用@Entity注释注释的类）。

更新：我现在对你的班级DBNamedQuery感到困惑。您说您正在使用一个类来放置所有命名查询。我的理解是您正在使用此类为应用程序的所有实体编写命名查询。如果这是正确的，您如何在班级@Entity上使用DBNamedQuery注释，因为它不是真正的jpa实体？

包含@NamedQuery注释的类应该是一个托管实体。我怀疑你的班级DBNamedQuery不是。

要确定问题，我建议检查日志，如果这是一个manged实体。如果您不能这样做，那么EntityManger会在运行时contains(java.lang.Object entity)期间为您和API提供检查。

在相关说明中，如果您使用的是注释，那么JPA Named Queries是jpa实体的一部分。使用xml可以灵活地存储在单独的文件中。

Answer 2

嗨我得到了你的问题，而不是创建一个类为什么不为你的命名查询创建一个xml文件，如Queries.hbm.xml，如下所示

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
    <!-- Query For User TO -->
    <query name="loadUserByUsername">from User u where u.username = ?</query>
</hibernate-mapping>

将此xml文件保存在resources文件夹中，并在applicationContext-enterprise-config.xml文件中将其写入如下

<property name="mappingResources">
    <list>
        <value>/resources/hbms/Queries.hbm.xml</value>
    </list>
</property>

所以它会正常工作。

修改嗯，这取决于你如何在DAO层中调用它。你必须打电话给=＆gt;

public int executeNamedQuery(String namedQuery, String namedParams[], Object params[]) throws DatabaseException { int result = 0; Session session = getSession(); final String methodName = "executeNamedQuery"; try { session.beginTransaction(); Query q = session.getNamedQuery(namedQuery); if (namedParams != null) { for (int i = 0; i < namedParams.length; i++) { q.setParameter(namedParams[i], params[i]); } } result = q.executeUpdate(); session.getTransaction().commit(); logger.debug("{} :: {} = {}", new Object[] { methodName, "No. of objects affected", result }); } catch (HibernateException e) { session.getTransaction().rollback(); final String message = "Couldn't execute the named query " + namedQuery; logger.error("{} :: {}", new Object[] { methodName, message, e }); throw new DatabaseException(getClass(), methodName, message, e); } finally { closeSession(); } return result; }

注意：1）namedQuery表示Queries.hbm.xml文件中的查询名称。 2）namedParams []表示Query的参数名称。 3）params表示参数值。

Answer 3

检查您的实体类DBNamedQuery是否在 ApplicationContext.xml 文件

中配置的包com.project.entities中

Answer 4

我认为这是因为名字未命中。在@NamedQuery中声明的名称与调用该查询的名称不匹配。

e.g

@NamedQuery(name = "AAAA", query = ... ) //must be same the name which call that query

public void some() {
   Query q = em.createNamedQuery("AAAA");
 }

Answer 5

在persistence.xml中添加注释扫描解决了我的问题

<property name="hibernate.archive.autodetection" value="class, hbm" />

即使我尝试在我的实体管理器中提供包扫描，如下所示 didnt 工作

  @Bean
       public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
           LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
           em.setDataSource(getDataSource());
           //em.setPackagesToScan("com.comp.proj.domain");
           em.setPersistenceUnitName(PERSISTENCE_UNIT_NAME);
           em.setJpaVendorAdapter(new HibernateJpaVendorAdapter());
           return em;
       }

java.lang.IllegalArgumentException：找不到命名查询。（实体管理器未创建NamedQuery）

5 个答案: