我在Eclipse Helios中创建了一个maven项目，并将“ hibernate-search 4.0.0.Final”和“ mysql-connector-java 5.1.18”添加到pom.xml依赖项中。两者都已下载并且存在于.m2目录中。但是当我运行这段代码时：
Session session = HibernateUtil.getSessionFactory().openSession();
session.beginTransaction();
session.getTransaction().commit();
只是在数据库中创建表以导入表中先前提供的值，我得到以下错误：
Exception in thread "main" java.lang.ExceptionInInitializerError
at net.leemoo.test.HibernateUtil.buildSessionFactory(HibernateUtil.java:19)
at net.leemoo.test.HibernateUtil.<clinit>(HibernateUtil.java:8)
at net.leemoo.test.MainClass.main(MainClass.java:9)
Caused by: org.hibernate.HibernateException: Dialect class not found: jdbc:mysql://localhost:3306/test?createDatabaseIfNotExist=true&useUnicode=true&characterEncoding=utf-8
at org.hibernate.service.jdbc.dialect.internal.DialectFactoryImpl.constructDialect(DialectFactoryImpl.java:76)
at org.hibernate.service.jdbc.dialect.internal.DialectFactoryImpl.buildDialect(DialectFactoryImpl.java:64)
at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:166)
at org.hibernate.service.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:75)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:159)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:131)
at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:71)
at org.hibernate.cfg.Configuration.buildSettingsInternal(Configuration.java:2270)
at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2266)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1735)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1775)
at net.leemoo.test.HibernateUtil.buildSessionFactory(HibernateUtil.java:13)
... 2 more
Caused by: org.hibernate.service.classloading.spi.ClassLoadingException: Unable to load class [jdbc:mysql://localhost:3306/test?createDatabaseIfNotExist=true&useUnicode=true&characterEncoding=utf-8]
at org.hibernate.service.classloading.internal.ClassLoaderServiceImpl.classForName(ClassLoaderServiceImpl.java:141)
at org.hibernate.service.jdbc.dialect.internal.DialectFactoryImpl.constructDialect(DialectFactoryImpl.java:73)
... 13 more
Caused by: java.lang.ClassNotFoundException: Could not load requested class : jdbc:mysql://localhost:3306/test?createDatabaseIfNotExist=true&useUnicode=true&characterEncoding=utf-8
at org.hibernate.service.classloading.internal.ClassLoaderServiceImpl$1.findClass(ClassLoaderServiceImpl.java:99)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at org.hibernate.service.classloading.internal.ClassLoaderServiceImpl.classForName(ClassLoaderServiceImpl.java:138)
... 14 more
我不知道该怎么办？我用谷歌搜索了这个错误，但是没有成功。请帮助我。提前致谢。
最佳答案
看起来某物（或某人）已将JDBC URL放在一个假定包含类名的属性中。
Caused by: java.lang.ClassNotFoundException:
Could not load requested class :
jdbc:mysql://localhost:3306/test?createDatabaseIfNotExist=true&useUnicode=true&characterEncoding=utf-8
那不是一个类名，应该是。
检查您的配置属性...