Hibernate出现Unsupported major.minor version 51.0错误

log4j:WARN No appenders could be found for logger (org.hibernate.cfg.annotations.Version).

log4j:WARN Please initialize the log4j system properly.

Exception in thread "main" java.lang.UnsupportedClassVersionError: net/sourceforge/jtds/jdbc/Driver : Unsupported major.minor version 51.0

at java.lang.ClassLoader.defineClass1(Native Method)

at java.lang.ClassLoader.defineClass(ClassLoader.java:621)

at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)

at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)

at java.net.URLClassLoader.access$000(URLClassLoader.java:56)

at java.net.URLClassLoader$1.run(URLClassLoader.java:195)

at java.security.AccessController.doPrivileged(Native Method)

at java.net.URLClassLoader.findClass(URLClassLoader.java:188)

at java.lang.ClassLoader.loadClass(ClassLoader.java:307)

at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)

at java.lang.ClassLoader.loadClass(ClassLoader.java:252)

at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)

at java.lang.Class.forName0(Native Method)

at java.lang.Class.forName(Class.java:169)

at org.hibernate.connection.DriverManagerConnectionProvider.configure(DriverManagerConnectionProvider.java:80)

at org.hibernate.connection.ConnectionProviderFactory.newConnectionProvider(ConnectionProviderFactory.java:137)

at org.hibernate.connection.ConnectionProviderFactory.newConnectionProvider(ConnectionProviderFactory.java:79)

at org.hibernate.cfg.SettingsFactory.createConnectionProvider(SettingsFactory.java:425)

at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:89)

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.gaojin.common.Dao.<init>(Dao.java:19)

at com.gaojin.webservice.windowsMobile.MobileImpl.main(MobileImpl.java:19)

如下图：



解决方法：

将引人的包 jtds-1.3.1.jar

换为

jtds-1.2.jar