hibernate 用oracle不能插入一条记录，都是序列惹的？

Question

oracle数据库：
简单的：DROP SEQUENCE S_Person_ID;
CREATE SEQUENCE S_Person_ID INCREMENT BY 1 START WITH 1 
    MAXVALUE 1.0E28 MINVALUE 1 NOCYCLE 
    CACHE 20 ORDER;
DROP TABLE T_Person;
CREATE TABLE T_Person
(
id NUMBER (18,0) NOT NULL PRIMARY KEY,   --人员的ID号
Name NVARCHAR2(50) NOT NULL        --人员的名称
);我的配置person.hbm.xml<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"><hibernate-mapping>
    <class name="hibernate3.pojo.Person" table="T_person">
        <id name="id" column="id" type="java.lang.Long">
          <generator class="native">
              <param name="sequence">S_Person_ID</param>
         </generator>
        </id>
        <property name="name"  column="name" type="java.lang.String"/>
    </class>
</hibernate-mapping>测试代码：package cn.thinkmore.hibernate.session;import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;public class Hibernate3Util {
private static SessionFactory sessionFactory;
static{
sessionFactory=new Configuration().configure("/hibernateCFG.xml").buildSessionFactory();
}
private static final ThreadLocal<Session> sessionContainer=new ThreadLocal<Session>();
public static Session currentSession(){
Session session=(Session)sessionContainer.get();
if(null==session){
session=sessionFactory.openSession();
sessionContainer.set(session);
}
return session;
}
public static void closeSession(){
Session session=sessionContainer.get();
if (null==session) {
}else {
session=sessionContainer.get();
session.close();
}
}
}
package test;import hibernate3.pojo.Person;import org.hibernate.Session;
import org.hibernate.Transaction;import cn.thinkmore.hibernate.session.Hibernate3Util;public class TestSession { /**
 * @param args
 */
public static void main(String[] args) {
Session session=Hibernate3Util.currentSession();
Person person=new Person();
person.setId(1);
person.setName("phenix");
Transaction ts=session.beginTransaction();
session.save(person);
ts.commit();
}}

Answer 1

错误是：
log4j:WARN No appenders could be found for logger (org.hibernate.cfg.Environment).
log4j:WARN Please initialize the log4j system properly.
Hibernate: insert into T_person (id, name) values (null, ?)
Exception in thread "main" org.hibernate.exception.ConstraintViolationException: could not insert: [hibernate3.pojo.Person]
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:71)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
at org.hibernate.id.insert.AbstractSelectingDelegate.performInsert(AbstractSelectingDelegate.java:40)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2158)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2638)
at org.hibernate.action.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:48)
at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:250)
at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:298)
at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:181)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:107)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:187)
at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:33)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:172)
at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:27)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:70)
at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:535)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:523)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:519)
at test.TestSession.main(TestSession.java:21)
Caused by: java.sql.SQLException: ORA-01400: 无法将 NULL 插入 ("U_TEST"."T_PERSON"."ID") at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134)
at oracle.jdbc.ttc7.TTIoer.processError(TTIoer.java:289)
at oracle.jdbc.ttc7.Oall7.receive(Oall7.java:573)
at oracle.jdbc.ttc7.TTC7Protocol.doOall7(TTC7Protocol.java:1891)
at oracle.jdbc.ttc7.TTC7Protocol.parseExecuteFetch(TTC7Protocol.java:1093)
at oracle.jdbc.driver.OracleStatement.executeNonQuery(OracleStatement.java:2047)
at oracle.jdbc.driver.OracleStatement.doExecuteOther(OracleStatement.java:1940)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:2709)
at oracle.jdbc.driver.OraclePreparedStatement.executeUpdate(OraclePreparedStatement.java:589)
at org.hibernate.id.insert.AbstractSelectingDelegate.performInsert(AbstractSelectingDelegate.java:33)
... 16 more

Answer 2

把这个        <id name="id" column="id" type="java.lang.Long">
          <generator class="native">
              <param name="sequence">S_Person_ID</param>
         </generator>
        </id>
改为        <id name="id" column="id" type="java.lang.Long">
          <generator class="sequence">
              <param name="sequence">S_Person_ID</param>
         </generator>
        </id>
报如下错误：
log4j:WARN No appenders could be found for logger (org.hibernate.cfg.Environment).
log4j:WARN Please initialize the log4j system properly.
Hibernate: select next value for S_Person_ID from dual_S_Person_ID
Exception in thread "main" org.hibernate.exception.SQLGrammarException: could not get next sequence value
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:67)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
at org.hibernate.id.SequenceGenerator.generate(SequenceGenerator.java:96)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:99)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:187)
at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:33)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:172)
at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:27)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:70)
at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:535)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:523)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:519)
at test.TestSession.main(TestSession.java:21)
Caused by: java.sql.SQLException: ORA-00923: 未找到预期 FROM 关键字 at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134)
at oracle.jdbc.ttc7.TTIoer.processError(TTIoer.java:289)
at oracle.jdbc.ttc7.Oall7.receive(Oall7.java:573)
at oracle.jdbc.ttc7.TTC7Protocol.doOall7(TTC7Protocol.java:1891)
at oracle.jdbc.ttc7.TTC7Protocol.parseExecuteDescribe(TTC7Protocol.java:830)
at oracle.jdbc.driver.OracleStatement.doExecuteQuery(OracleStatement.java:2391)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:2672)
at oracle.jdbc.driver.OraclePreparedStatement.executeUpdate(OraclePreparedStatement.java:589)
at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePreparedStatement.java:527)
at org.hibernate.id.SequenceGenerator.generate(SequenceGenerator.java:75)
... 10 more