在开发表格组件的时候,有设置多级表头的需求,前端json数据格式为List<Map<String,List<Map<String,String>>>>,即List<Map<List>>格式,若直接使用
List<Map<String, Object>> querys=(List<Map<String,Object>>)JSONArray.toList(chosendimes,Map.class);
for (Iterator iterator = querys.iterator(); iterator.hasNext();) {
Map<String, Object> map = (Map<String, Object>) iterator.next();
List list = (ArrayList) map.get("children");
for (Iterator iterator2 = list.iterator(); iterator2.hasNext();) {
Map<String, Object> map2 = (Map<String, Object>) iterator2.next();
转化,则红色代码处会报上述错误,因为
在操作json的数据格式的时候,如果没有指明数据类型,那么只能是基本类型或者是String类型,不能出现复杂数据类型。改正方式为:
Map<String, Object> typeM=new HashMap<String, Object>();
typeM.put("children",HashMap.class);
List<Map<String, Object>> querys=(List<Map<String,Object>>)JSONArray.toList(chosendimes,Map.class,typeM);
for (Iterator iterator = querys.iterator(); iterator.hasNext();) {
Map<String, Object> map = (Map<String, Object>) iterator.next();
List list = (ArrayList) map.get("children");
for (Iterator iterator2 = list.iterator(); iterator2.hasNext();) {
Map<String, Object> map2 = (Map<String, Object>) iterator2.next();