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java.lang.ExceptionInInitializerError at com.hibernate.utils.HibernateUtil.<clinit>(HibernateUtil.java:19) at com.hibernate.model.TeacherTest.launch(TeacherTest.java:21) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.junit.internal.runners.TestMethodRunner.executeMethodBody(TestMethodRunner.java:99) at org.junit.internal.runners.TestMethodRunner.runUnprotected(TestMethodRunner.java:81) at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34) at org.junit.internal.runners.TestMethodRunner.runMethod(TestMethodRunner.java:75) at org.junit.internal.runners.TestMethodRunner.run(TestMethodRunner.java:45) at org.junit.internal.runners.TestClassMethodsRunner.invokeTestMethod(TestClassMethodsRunner.java:71) at org.junit.internal.runners.TestClassMethodsRunner.run(TestClassMethodsRunner.java:35) at org.junit.internal.runners.TestClassRunner$1.runUnprotected(TestClassRunner.java:42) at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34) at org.junit.internal.runners.TestClassRunner.run(TestClassRunner.java:52) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192) Caused by: org.hibernate.HibernateException: ‘hibernate.dialect‘ must be set when no Connection avalable at org.hibernate.dialect.resolver.DialectFactory.buildDialect(DialectFactory.java:107) at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:138) at org.hibernate.cfg.Configuration.buildSettingsInternal(Configuration.java:2119) at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2115) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1339) at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:867) at com.hibernate.utils.HibernateUtil.<clinit>(HibernateUtil.java:13) ... 21 more
今天在用Hibernate AnnotationConfiguration往数据库中写入数据时遇到一个bug,用junit测试时总是提示上述异常，用debug跟踪时发现sessionFactory 获取不到，更别提获取Session了，因为以下的工具类是从 Annotation文档中直接copy过来，自认为应该不会有任何问题，但是问题就在这里~~~
public class HibernateUtil { private static final SessionFactory sessionFactory; static { try { sessionFactory = new AnnotationConfiguration().buildSessionFactory();
//应该改为SessionFactory sessionFactory = new AnnotationConfiguration().configure().buildSessionFactory(); } catch (Throwable ex) { // Log exception! System.out.println("SessionFactory创建失败，下面是失败的原因:"); ex.printStackTrace(); System.out.println("SessionFactory创建失败？"); throw new ExceptionInInitializerError(ex); } } public static Session getSession() throws HibernateException { return sessionFactory.openSession(); } }
测试类TeacherTest
public class TeacherTest {
@Test
public void launch(){
Teacher s = new Teacher();
s.setId(1);
s.setAge(6);
s.setName("bbbb");
s.setBirthday(new Date());
s.setZhicheng(ZhiCheng.A);
Session session =HibernateUtil.getSession();//在此报错
session.beginTransaction();
session.save(s);
session.getTransaction().commit();
}
}
在Console栏中提示SessionFactory创建失败，下面是失败的原因:
org.hibernate.HibernateException: ‘hibernate.dialect‘ must be set when no Connection avalable
问题在于SessionFactory的获取上，我们以往用Configuration获取SessionFactory时是这样获取得：
SessionFactory sessionFactory = new Configuration().configure().buildSessionFactory();
所以我们在用AnnotationConfiguration时也应该与之类似，即，而在文档中漏掉了configure（），导致我们获取不到sessionFavtory~~
这是文档中的小bug记得自己更正，希望能帮到你~~~
SessionFactory sessionFactory = new AnnotationConfiguration().configure().buildSessionFactory();
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原文地址：http://www.cnblogs.com/GeekRegister/p/4971773.html
