hibernate-4.2.3 @OneToOne 不能用了么？

Question

这个版本高的hibernate lib 里，不是有个文件夹required，只要把这个加进来就好了吧，可是@onetoone不能映射啊，是什么问题，难道是有什么包没有导入？Hibernate

Answer 1

14:04:15,703 ERROR ShutdownHook:62 - Problem calling "get cause" on IllegalStateException.
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.logicalcobwebs.proxool.ShutdownHook.remove(ShutdownHook.java:40)
at org.logicalcobwebs.proxool.ProxoolFacade.shutdown(ProxoolFacade.java:238)
at org.logicalcobwebs.proxool.ProxoolFacade.shutdown(ProxoolFacade.java:220)
at org.logicalcobwebs.proxool.ShutdownHook.run(ShutdownHook.java:99)
at java.lang.Thread.run(Thread.java:722)
Caused by: java.lang.IllegalStateException: Shutdown in progress
at java.lang.ApplicationShutdownHooks.remove(ApplicationShutdownHooks.java:82)
at java.lang.Runtime.removeShutdownHook(Runtime.java:237)
... 9 more
这是报的错误，加上@OneToOne后就报错了，