hibernate注解建表问题

2014-12-14 08:08:14 201 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

A-Level CS 计算机科学考试知识点——考试介绍&第1章前言：该系列文章是本人在给学生辅导本课程的过程中结合英文教材所总结的，该系列共分为30章，主要介绍了考试的核心知识点。若需要A-Level CS 计算机科学考试辅导也可以私信我。目录关于A-Level CS 计算机科学考试考试简介考试内容考试时间评分情况第1章信息表示本章学习内容 1.01 数字系统 1.02 数字的内部编码整数编码（Coding for integers）二进制编码的十进制（Binary coded decimal——BCD） 1.03. 阅读详情

学习hibernate 注解建表的时候出现的问题

package demo.annotations.entity;



import javax.persistence.Entity;

import javax.persistence.GeneratedValue;

import javax.persistence.GenerationType;

import javax.persistence.Id;

import javax.persistence.Table;



@Entity

public class weapon {



	private int id;

	private String namt;

	

	@Id

	@GeneratedValue(strategy=GenerationType.SEQUENCE)

	public int getId() {

		return id;

	}

	public void setId(int id) {

		this.id = id;

	}

	public String getNamt() {

		return namt;

	}

	public void setNamt(String namt) {

		this.namt = namt;

	}

	

}

=================================================================

package demo.annotations.entity;



import org.hibernate.Session;

import org.hibernate.SessionFactory;

import org.hibernate.Transaction;

import org.hibernate.cfg.AnnotationConfiguration;



public class Testpo {

	

	   public static AnnotationConfiguration config=new AnnotationConfiguration();

	   public static SessionFactory sessionFactory;

	   public static String contig_file="/hibernate.cfg.xml";

	    

public static void main(String []args) {

	

	config.configure(contig_file);

	sessionFactory=config.buildSessionFactory();

    Session session=sessionFactory.openSession();

    Transaction tran=session.beginTransaction();

	

		weapon wp=new weapon();

		

		wp.setNamt("恐龙");

		session.save(wp);

		

		

		

		tran.commit();

		session.close();

		

	}

}

提示错误是
log4j:WARN No appenders could be found for logger (org.hibernate.cfg.annotations.Version).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
Hibernate: select hibernate_sequence.nextval from dual
Exception in thread "main" org.hibernate.exception.SQLGrammarException: could not get next sequence value
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:90)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
at org.hibernate.id.SequenceGenerator.generate(SequenceGenerator.java:119)
at org.hibernate.id.SequenceHiLoGenerator.generate(SequenceHiLoGenerator.java:81)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:122)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:210)
at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:56)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:195)
at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:50)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:93)
at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:563)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:551)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:547)
at demo.annotations.entity.Testpo.main(Testpo.java:24)
Caused by: java.sql.SQLException: ORA-02289: 序列不存在
然后把

@GeneratedValue(strategy=GenerationType.SEQUENCE)

句话去掉后报错是
log4j:WARN No appenders could be found for logger (org.hibernate.cfg.annotations.Version).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
Hibernate: insert into weapon (namt, id) 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 demo.annotations.entity.Testpo.main(Testpo.java:28)
Caused by: java.sql.BatchUpdateException: ORA-00942: 表或视图不存在

...全文