十万火急!!!!求高手解答!!
Hibernate: select users0_.oid as oid0_, users0_.userid as userid0_, users0_.username as username0_, users0_.password as password0_, users0_.isadmin as isadmin0_ from users users0_ where users0_.userid=?
ERROR -- java.lang.NullPointerException -- [com.wisoft.common.po.RootHandler]
是什么问题?怎么解决?