java.lang.IllegalArgumentException : Named query not found.(实体管理器未创建 NamedQuery)

Question

我正在使用 hibernate 4.1.5.Final 和 Spring 3.1.2 Release 以及 Jboss 7.1。我已经在一个带有 @NamedQuery 注释的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。我正在发布堆栈跟踪和 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)

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-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

你在上面的声明中没有明确提到你所指的类的类型？您需要在 Entity 类(用 @Entity 注释注释的类)中编写命名查询。

更新:我现在对您的类 DBNamedQuery 有点困惑。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，你怎么能在你的类 DBNamedQuery 上使用 @Entity 注释，因为它实际上不是一个 jpa 实体？

包含 @NamedQuery 注释的类应该是托管实体。我怀疑你的类 DBNamedQuery 不是。

要确定问题，我建议检查日志是否是托管实体。如果您不能这样做，那么 EntityManger 会为您提供 API 以在运行时检查 contains(java.lang.Object entity)。

在相关说明中，如果您使用注释，那么 JPA 命名查询是 jpa 实体的一部分。使用 xml 可让您灵活地存储在单独的文件中。