IssuesBean 为我们model类，已进行fromJson和toJson（不知道的网上自行搜索）

var resMap = json.decode(response.toString())

var dataList = resMap['result']['obj']['items'];

dataList为lists列表数据

方式一：

List<IssuesBean> list = List<IssuesBean>.from(
    dataList.map((item) => IssuesBean.fromJson(item)).toList());

方式二：

List<IssuesBean> list = (dataList as List<dynamic>)
    .map((item) => IssuesBean.fromJson((item as Map<String, dynamic>)))
    .toList();