通过beanutils.copyproperties可以时间拷贝对象中的值，下面的new string[]{"cid","agreeflag","flag","publishtime","projectnum"}表示的不拷贝的属性值
copyright copyright = copyrightservice.createcopyright(request, user);
//获得要修改的course,然后重新设置参数
copyright copyrightindatabase = copyrightservice.findbycopyrightid(copyright.getcid());
beanutils.copyproperties(copyright, copyrightindatabase,
new string[]{"cid","agreeflag","flag","publishtime","projectnum"})