Question

我用的是hibernate，我的mysql数据库是5.5.20版本，导入了驱动包，但是总提示错误！

Exception in thread "main" org.hibernate.HibernateException: JDBC Driver class not found: com.mysql.jdbc.Driver
at org.hibernate.connection.DriverManagerConnectionProvider.configure(DriverManagerConnectionProvider.java:89)
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 StudentTest.main(StudentTest.java:20)
Caused by: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:169)
at org.hibernate.util.ReflectHelper.classForName(ReflectHelper.java:192)
at org.hibernate.connection.DriverManagerConnectionProvider.configure(DriverManagerConnectionProvider.java:84)
... 8 more

Answer 1

at StudentTest.main(StudentTest.java:20) 你看到这行了么 问题出在这

还有mysql的jar包导入了么
JDBC Driver class not found 说没找到你的驱动jar包

Answer 2

仔细检查一下你的配置文件，看写对了没？

Answer 3

驱动包没有导入，或者导入的jar包是错的

去网上再找一个对应的jar包导进去试试

Answer 4

去mysql官方下载个驱动包