在netbeans 8.1和mysql中使用java持久性API。 我已经从数据库自动创建了实体类，并为每个实体创建了自动JPA控制器。 现在的主要方法是：
public static void main(String[] args) {
/*
*/ EntityManagerFactory emf = Persistence.createEntityManagerFactory("TravelPU");
Person p1 = new Person(1);
p1.setName("Antonio");
p1.setJobtitle("programmer");
Person p2 = new Person(2);
p2.setName("John");
p2.setJobtitle("sysadmin");
PersonJpaController jpap = new PersonJpaController(emf);
try {
jpap.create(p1);
jpap.create(p2);
System.out.println(jpap.findPerson(1));
} catch (Exception ex) {
Logger.getLogger(Travel.class.getName()).log(Level.SEVERE, null, ex);
}
finally {
emf.close();
}
}
当我跑步时，我得到以下异常： 我不知道是什么问题，库是EclipseLink（JPA 2.1）。 操作系统是debian 9。 我无话可说，我给了你有用的信息，我认为是必要的。
Exception in thread "main" Local Exception Stack:
Exception [EclipseLink-30005] (Eclipse Persistence Services -
2.5.1.v20130918-f2b9fc5):
org.eclipse.persistence.exceptions.PersistenceUnitLoadingException
Exception Description: An exception was thrown while searching for
persistence archives with ClassLoader:
sun.misc.Launcher$AppClassLoader@24d46ca6
Internal Exception: javax.persistence.PersistenceException: Exception
[EclipseLink-28018] (Eclipse Persistence Services - 2.5.1.v20130918-
f2b9fc5): org.eclipse.persistence.exceptions.EntityManagerSetupException
Exception Description: Predeployment of PersistenceUnit [TravelPU]
failed.
Internal Exception: java.lang.IncompatibleClassChangeError: Implementing
class
at
org.eclipse.persistence.exceptions.
PersistenceUnitLoadingException.
exceptionSearchingForPersistenceResources(
PersistenceUnitLoadingException.java:127)
at
org.eclipse.persistence.jpa.PersistenceProvider.createEntityManagerFactoryImpl(PersistenceProvider.java:107)
at org.eclipse.persistence.jpa.PersistenceProvider.createEntityManagerFactory(PersistenceProvider.java:177)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:79)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:54)
at travel.Travel.main(Travel.java:30)
Caused by: javax.persistence.PersistenceException: Exception [EclipseLink-28018] (Eclipse Persistence Services - 2.5.1.v20130918-f2b9fc5): org.eclipse.persistence.exceptions.EntityManagerSetupException
Exception Description: Predeployment of PersistenceUnit [TravelPU] failed.
Internal Exception: java.lang.IncompatibleClassChangeError: Implementing class
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.createPredeployFailedPersistenceException(EntityManagerSetupImpl.java:1954)
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.predeploy(EntityManagerSetupImpl.java:1945)
at org.eclipse.persistence.internal.jpa.deployment.JPAInitializer.callPredeploy(JPAInitializer.java:98)
at org.eclipse.persistence.jpa.PersistenceProvider.createEntityManagerFactoryImpl(PersistenceProvider.java:96)
... 4 more
Caused by: Exception [EclipseLink-28018] (Eclipse Persistence Services - 2.5.1.v20130918-f2b9fc5): org.eclipse.persistence.exceptions.EntityManagerSetupException
Exception Description: Predeployment of PersistenceUnit [TravelPU] failed.
Internal Exception: java.lang.IncompatibleClassChangeError: Implementing class
at org.eclipse.persistence.exceptions.EntityManagerSetupException.predeployFailed(EntityManagerSetupException.java:230)
... 8 more
Caused by: java.lang.IncompatibleClassChangeError: Implementing class
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at org.eclipse.persistence.internal.jpa.metadata.MetadataProcessor.processEntityMappings(MetadataProcessor.java:538)
at org.eclipse.persistence.internal.jpa.deployment.PersistenceUnitProcessor.processORMetadata(PersistenceUnitProcessor.java:581)
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.predeploy(EntityManagerSetupImpl.java:1869)
... 6 more
/home/XXX/.cache/netbeans/8.1/executor-snippets/run.xml:53: Java returned: 1
BUILD FAILED (total time: 0 seconds)
的persistence.xml：
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1" xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
<persistence-unit name="TravelPU" transaction-type="RESOURCE_LOCAL">
<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
<class>model.Carrental</class>
<class>model.Hotel</class>
<class>model.Flight</class>
<class>model.Person</class>
<class>model.Persontrip</class>
<class>model.Triptype</class>
<class>model.Trip</class>
<properties>
<property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/travel?zeroDateTimeBehavior=convertToNull"/>
<property name="javax.persistence.jdbc.user" value="xxxxxx"/>
<property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver"/>
<property name="javax.persistence.jdbc.password" value="xxxxxx"/>
</properties>
</persistence-unit>
</persistence>