我要崩溃了，这哪里错了啊！！！

Question

今天学习了青鸟租房管理系统，出现了下面的错误，百度找了半天，没法，大神救我！！！

严重: Servlet.service() for servlet jsp threw exception

tag 'doubleselect', field 'list', name 'districtId': The requested list key 'disList' could not be resolved as a collection/array/map/enumeration/iterator type. Example: people or people.{name} - [unknown location]

严重: Servlet.service() for servlet [jsp] in context with path [/RentHouse] threw exception [tag 'doubleselect', field 'list', name 'districtId': The requested list key 'disList' could not be resolved as a collection/array/map/enumeration/iterator type. Example: people or people.{name} - [unknown location]] with root cause

tag 'doubleselect', field 'list', name 'districtId': The requested list key 'disList' could not be resolved as a collection/array/map/enumeration/iterator type. Example: people or people.{name} - [unknown location]

Answer 1

上jsp代码。。标签估计遍历的时候有问题

Answer 2

你页面中要遍历的对象他认为不是一个集合，不能遍历。