The given object has a null identifier解决之法
<input
type="hidden"
name="memberPermission.id"
value="${memberpermission.id}">
<input
type="hidden"
name="memberPermission.mtid"
value="${memberpermission.mtid}">
出现这个异常,一般来说主要修改时候主键没有传递或者name属性指定错误。
解决方案:你要把你的更新的实例的主键传过去,可以以hidden的方式传。
参考:http://blog.csdn.net/chenssy/article/details/8362871
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