Configuration cfg=new Configuration();
cfg.configure();
SessionFactory sf=cfg.buildSessionFactory();
Session sess=sf.openSession();
Transaction t=sess.beginTransaction();
LOGINTABLE product=new LOGINTABLE();
product.setID(12);
product.setUsername("d");
sess.save(product);
sess.flush();
t.commit();
sess.close();查询数据的时候没有问题,可以取到数据,但是插入时候报错如下.
org.hibernate.exception.GenericJDBCException: could not get next sequence value
org.hibernate.exception.ErrorCodeConverter.handledNonSpecificException(ErrorCodeConverter.java:92)
org.hibernate.exception.ErrorCodeConverter.convert(ErrorCodeConverter.java:80)
org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
org.hibernate.id.SequenceGenerator.generate(SequenceGenerator.java:96)
org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:85)
org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:184)
org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:33)
org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:173)
org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:27)
org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:69)
org.hibernate.impl.SessionImpl.save(SessionImpl.java:481)
org.hibernate.impl.SessionImpl.save(SessionImpl.java:476)
kouzasateiForm.validate(kouzasateiForm.java:117)
org.apache.struts.action.RequestProcessor.processValidate(RequestProcessor.java:942)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:255)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)
javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)是sess.save(product);的问题,我一句一句注释的.请问怎回事.
cfg.configure();
SessionFactory sf=cfg.buildSessionFactory();
Session sess=sf.openSession();
Transaction t=sess.beginTransaction();
LOGINTABLE product=new LOGINTABLE();
product.setID(12);
product.setUsername("d");
sess.save(product);
sess.flush();
t.commit();
sess.close();查询数据的时候没有问题,可以取到数据,但是插入时候报错如下.
org.hibernate.exception.GenericJDBCException: could not get next sequence value
org.hibernate.exception.ErrorCodeConverter.handledNonSpecificException(ErrorCodeConverter.java:92)
org.hibernate.exception.ErrorCodeConverter.convert(ErrorCodeConverter.java:80)
org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
org.hibernate.id.SequenceGenerator.generate(SequenceGenerator.java:96)
org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:85)
org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:184)
org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:33)
org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:173)
org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:27)
org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:69)
org.hibernate.impl.SessionImpl.save(SessionImpl.java:481)
org.hibernate.impl.SessionImpl.save(SessionImpl.java:476)
kouzasateiForm.validate(kouzasateiForm.java:117)
org.apache.struts.action.RequestProcessor.processValidate(RequestProcessor.java:942)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:255)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)
javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)是sess.save(product);的问题,我一句一句注释的.请问怎回事.
要么是没有设置SEQUENCE,要么SEQUENCE名不对
<!DOCTYPE hibernate-mapping
PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="LOGINTABLE">
<id name="ID" type="java.lang.Integer">
<generator class="native"/>
</id>
<property name="username" type="java.lang.String"/>
<property name="password" type="java.lang.String"/>
</class>
</hibernate-mapping>
请问应该怎么改
这是你的数据库里面的sequence 设置 问题,只要在sequence 的设置中调的开始值大于你表中记录的最大值就行了,还有去掉 product.setID(12);
<id name="id" column="ID" type="java.lang.Integer">
<generator class="native">
<param name = "sequence" >S_USER</param>
</generator>
</id>
建个名为S_USER的sequence 。
<generator class="native"/>
</id>
那这句是什么???
<id name="ID" type="java.lang.Integer">
<generator class="native"/>
</id> 这样的设置,已经是使得id是由数据库来产生的,你自己不用手动干预,还有,id这个字段必须在数据据中设为“主键”,并且是“自增”型的。
org.apache.struts.action.RequestProcessor.processException(RequestProcessor.java:545)
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:486)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)
javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)sess.flush();
现在这句话又报了这个错误.