Hibernate 操作oracle 不能保存

我提交保存  后台打印

2012-8-30 17:13:47 org.apache.coyote.http11.Http11AprProtocol start
信息: Starting Coyote HTTP/1.1 on http-8080
2012-8-30 17:13:47 org.apache.coyote.ajp.AjpAprProtocol start
信息: Starting Coyote AJP/1.3 on ajp-8009
2012-8-30 17:13:47 org.apache.catalina.startup.Catalina start
信息: Server startup in 11949 ms


Hibernate: select hibernate_sequence.nextval from dual