Hibernate ORA-02289: 序列不存在

org.hibernate.exception.SQLGrammarException: could not extract ResultSet
	at org.hibernate.exception.internal.SQLExceptionTypeDelegate.convert(SQLExceptionTypeDelegate.java:80)
	at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:49)
	at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:126)
	at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:112)
	at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.extract(ResultSetReturnImpl.java:91)
	at org.hibernate.id.SequenceGenerator.generateHolder(SequenceGenerator.java:122)
	at org.hibernate.id.SequenceGenerator.generate(SequenceGenerator.java:115)
	at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:118)
	at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:209)
	at org.hibernate.event.internal.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:55)
	at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:194)
	at org.hibernate.event.internal.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:49)
	at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:90)
	at org.hibernate.internal.SessionImpl.fireSave(SessionImpl.java:715)
	at org.hibernate.internal.SessionImpl.save(SessionImpl.java:707)
	at org.hibernate.internal.SessionImpl.save(SessionImpl.java:702)
	at com.zhaogd.myapplication.test.Test.main(Test.java:39)
Caused by: java.sql.SQLSyntaxErrorException: ORA-02289: 序列不存在

	at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:447)
	at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:396)
	at oracle.jdbc.driver.T4C8Oall.processError(T4C8Oall.java:951)
	at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:513)
	at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:227)
	at oracle.jdbc.driver.T4C8Oall.doOALL(T4C8Oall.java:531)
	at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:208)
	at oracle.jdbc.driver.T4CPreparedStatement.executeForDescribe(T4CPreparedStatement.java:886)
	at oracle.jdbc.driver.OracleStatement.executeMaybeDescribe(OracleStatement.java:1175)
	at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1296)
	at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3613)
	at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePreparedStatement.java:3657)
	at oracle.jdbc.driver.OraclePreparedStatementWrapper.executeQuery(OraclePreparedStatementWrapper.java:1495)
	at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.extract(ResultSetReturnImpl.java:82)
	... 12 more

因为Hibernate中主键设为自增的，hibernate中的实体类与数据库的映射文件中配置数据库 的Sequence 

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC 
    "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
    "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">

<hibernate-mapping>
    
    <class name="com.zhaogd.myapplication.model.SysUser" table="SYS_USER">
        <id name="id">
            <!--主键生产策略 -->
            <generator class="native">
              <!--SEQ_SYS_USER 为orcale中创建的sequence-->
               <param name="sequence">SEQ_SYS_USER</param> 
            </generator>
        </id>
        <!--实体类属性-->
        <property name="username" />    
        <property name="password" />
    </class>

</hibernate-mapping>

至于orcale中如何创建sequence 

-- Create sequence 
create sequence SEQ_SYS_USER
minvalue 1
maxvalue 999999999999999999
start with 21
increment by 1
cache 20;