休眠注释

Question

iam执行eclipse中的hibernate anotation示例galileo iam出现以下错误。

Hibernate: insert into employee1 (Name, ID) values (?, ?) 
Exception in thread "main" org.hibernate.exception.SQLGrammarException: Could not execute JDBC batch update 
    at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:67) 
    at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43) 
    at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:253) 
    at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:237) 
    at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:141) 
    at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:298) 
    at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27) 
    at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000) 
    at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:338) 
    at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:106) 
    at net.roseindia.Example1.main(Example1.java:22) 
Caused by: java.sql.BatchUpdateException: Table 'test.employee1' doesn't exist 
    at com.mysql.jdbc.PreparedStatement.executeBatch(PreparedStatement.java:1566) 
    at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:48) 
    at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:246) 
    ... 8 more

Answer 1

产生的原因：java.sql.BatchUpdateException：表 'test.employee1' 不存在

这意味着，如果你想休眠的表不存在:-)自动创建和删除表格，将属性hibernate.hbm2ddl.auto设置为create-drop。另外，我建议阅读Hibernate文档，因为它是初学者最好的资源之一。

http://docs.jboss.org/hibernate/entitymanager/3.6/reference/en/html/configuration.html#setup-configuration