Question

我已经尝试了几种建议的方法来解决这个java持久性异常，但还没有成功。任何建议或帮助将不胜感激。

以下是详情

SQLQueries.xml
-----------------------------

<?xml version="1.0" encoding="UTF-8"?>
<entity-mappings 
    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/orm_2_0.xsd "
    version="2.0">

    <sql-query name="GET_NEXT_NUM_SP" callable="true">
        <return alias = "nextNumber" class="com.utility.numbergenerator.da.NumberDAOImpl">
        <return-property name="nextSeqNum" column="NEXT_SEQ_NUM" />
    </return>
        { ? = call Test_Proc }
    </sql-query>    

</entity-mappings>

persistence.xml
-----------------------

<?xml version="1.0" encoding="UTF-8"?>
<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="NG" transaction-type="RESOURCE_LOCAL">
        <provider>org.hibernate.ejb.HibernatePersistence</provider>
        <mapping-file>META-INF/SQLQueries.xml</mapping-file>
        <class> Several related classes </class>
        <properties> Followed by properties </properties>
    </persistence-unit>

异常的堆栈跟踪

- 初始化数据库连接 - javax.persistence.PersistenceException：[PersistenceUnit：NG]读取JPA XML文件时出错：META-INF / SQLQueries.xml 在org.hibernate.ejb.Ejb3Configuration.addClassesToSessionFactory（Ejb3Configuration.java:1205）在org.hibernate.ejb.Ejb3Configuration.configure（Ejb3Configuration.java:1004）在org.hibernate.ejb.Ejb3Configuration.configure（Ejb3Configuration.java:282）在org.hibernate.ejb.Ejb3Configuration.configure（Ejb3Configuration.java:366）在org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory（HibernatePersistence.java:56）在javax.persistence.Persistence.createEntityManagerFactory（Persistence.java:48）在javax.persistence.Persistence.createEntityManagerFactory（Persistence.java:32）在com.go2uti.oneworld.common.hibernate.HibernateUtil.initializeJPA（HibernateUtil.java:68）在com.go2uti.oneworld.common.hibernate.HibernateUtil。（HibernateUtil.java:38）在com.go2uti.oneworld.utility.businessidgenerator.da.EntityManagerFactorySingleton.init（EntityManagerFactorySingleton.java:26）在com.go2uti.oneworld.utility.businessidgenerator.compatibility.AbstractPersistentTest.initializeContext（AbstractPersistentTest.java:38） at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method） at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:57） at sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43） at java.lang.reflect.Method.invoke（Method.java:606）在org.junit.runners.model.FrameworkMethod $ 1.runReflectiveCall（FrameworkMethod.java:45）在org.junit.internal.runners.model.ReflectiveCallable.run（ReflectiveCallable.java:15）在org.junit.runners.model.FrameworkMethod.invokeExplosively（FrameworkMethod.java:42）在org.junit.internal.runners.statements.RunBefores.evaluate（RunBefores.java:27）在org.junit.internal.runners.statements.RunAfters.evaluate（RunAfters.java:30）在org.junit.runners.ParentRunner.runLeaf（ParentRunner.java:263）在org.junit.runners.BlockJUnit4ClassRunner.runChild（BlockJUnit4ClassRunner.java:68）在org.junit.runners.BlockJUnit4ClassRunner.runChild（BlockJUnit4ClassRunner.java:47）在org.junit.runners.ParentRunner $ 3.run（ParentRunner.java:231）在org.junit.runners.ParentRunner $ 1.schedule（ParentRunner.java:60）在org.junit.runners.ParentRunner.runChildren（ParentRunner.java:229）在org.junit.runners.ParentRunner.access $ 000（ParentRunner.java:50）在org.junit.runners.ParentRunner $ 2.evaluate（ParentRunner.java:222）在org.junit.runners.ParentRunner.run（ParentRunner.java:300）在org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run（JUnit4TestReference.java:50）在org.eclipse.jdt.internal.junit.runner.TestExecution.run（TestExecution.java:38）在org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests（RemoteTestRunner.java:467）在org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests（RemoteTestRunner.java:683）在org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run（RemoteTestRunner.java:390）在org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main（RemoteTestRunner.java:197）引起：org.hibernate.InvalidMappingException：无法读取XML 在org.hibernate.util.xml.MappingReader.readMappingDocument（MappingReader.java:101）在org.hibernate.cfg.Configuration.add（Configuration.java:513）在org.hibernate.cfg.Configuration.add（Configuration.java:509）在org.hibernate.cfg.Configuration.add（Configuration.java:716）在org.hibernate.cfg.Configuration.addResource（Configuration.java:801）在org.hibernate.cfg.AnnotationConfiguration.addResource（AnnotationConfiguration.java:152）在org.hibernate.ejb.Ejb3Configuration.addClassesToSessionFactory（Ejb3Configuration.java:1192） ......还有34个

请帮我解决这个问题。

Answer 1

您的META-INF/SQLQueries.xml文件基于JPA 2.0 XML映射架构，该架构由http://java.sun.com/xml/ns/persistence/orm_2_0.xsd定义。

由于sql-query元素是特定于Hibernate的，因此您需要将<entity-mappings>替换为<hibernate-mapping>，如下所示：

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC 
 "-//Hibernate/Hibernate Mapping DTD//EN"
 "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> 

<hibernate-mapping>

    <sql-query name="GET_NEXT_NUM_SP" callable="true">
        <return alias="nextNumber" class="com.utility.numbergenerator.da.NumberDAOImpl">
            <return-property name="nextSeqNum" column="NEXT_SEQ_NUM" />
        </return>
        { ? = call Test_Proc }
    </sql-query>

</hibernate-mapping>

javax.persistence.PersistenceException：[PersistenceUnit：NG]读取JPA XML文件时出错：META-INF / SQLQueries.xml

异常的堆栈跟踪

1 个答案: