persistence中，方法中缺少非本机或抽象的代码属性

1 周，4 日 Questions & Answers 602

我发现与这个问题相关的帖子很少，但没有一篇帮助我解决这个错误。我正在使用ant作为构建工具。我尝试了不同的jar，比如openjpa-persistence-1.2.1。jar，eclipselink-2.4.1，hibernate-jpa-2.0-api-1.0.1。最终来源，也使用了javaee-api-6.0。jar并将它们放入构建路径中，以查看它是否找到了持久性。不管是不是阶级团体。但没有任何帮助。非常感谢您的帮助

坚持。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="persistenceUnit" transaction-type="RESOURCE_LOCAL">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
    <jar-file>lib/dependentProject.jar</jar-file>

    <properties>
            <property name="javax.persistence.validation.mode" value="none" />
            <property name="hibernate.archive.autodetection" value="class"/>
            <property name="hibernate.show_sql" value="false"/>
            <property name="hibernate.connection.driver_class" value="oracle.jdbc.OracleDriver"/>
            <property name="hibernate.connection.username" value="XXX"/>
            <property name="hibernate.connection.password" value="XXX"/>
            <property name="hibernate.connection.url" value="connectionURL"/>
            <property name="hibernate.dialect" value="org.hibernate.dialect.Oracle10gDialect"/>
        </properties>
    </persistence-unit>
</persistence>

抛出错误的代码

 EntityManagerFactory emf = Persistence.createEntityManagerFactory("persistenceUnit")

错误消息：

Exception in thread "main" java.lang.ClassFormatError: Absent Code attribute in method that is not native or abstract in class file javax/persistence/Persistence
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
    at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)

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eclipse java。lang.ClassFormatError：在类文件javax/persistence/persistence中，方法中缺少非本机或抽象的代码属性

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