@Entity
@Table(name = "TBUSER")
@GenericGenerator(name = "user_increment", strategy = "increment")
public class User {
    private int id;

    @Id
    @Column(name = "UID")
    @GeneratedValue(generator = "user_increment")
    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

}

public static void main(String[] args) {
        // TODO Auto-generated method stub
        Session session = HibernateSessionFactory.getSession();
        session.beginTransaction();
        User u = new User();
        session.save(u);
        session.getTransaction().commit();
        session.close();
    }

log4j:WARN No appenders could be found for logger (org.hibernate.cfg.annotations.Version).
log4j:WARN Please initialize the log4j system properly.
Hibernate: 
    select
        max(UID) 
    from
        TBUSER
Hibernate: 
    insert 
    into
        TBUSER
        (UID) 
    values
        (?)
Exception in thread "main" org.hibernate.exception.SQLGrammarException: Could not execute JDBC batch update
    at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:90)
    at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
    at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:275)
    at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:266)
    at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:167)
    at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:321)
    at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:50)
    at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1028)
    at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:366)
    at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:137)
    at com.hib.entity.Test.main(Test.java:18)
Caused by: java.sql.BatchUpdateException: ORA-00928: 缺失 SELECT 关键字

    at oracle.jdbc.driver.OraclePreparedStatement.executeBatch(OraclePreparedStatement.java:10070)
    at oracle.jdbc.driver.OracleStatementWrapper.executeBatch(OracleStatementWrapper.java:213)
    at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:70)
    at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:268)
    ... 8 more