The javascript json object is passed in the list in the action method

Why 80% of the code can not do farming architect? >>>  

Javascript：

data:{"updValRecords":'[{"taskId":100, "coutp":980},{"taskId":101, "coutp":981}]'},

Note: List content has passed a string

 

Action List is defined in the
 private List <ValRecordModel> updValRecords;

 public void setUpdValRecords(String updValRecordsStr) {
  JSONArray jsonArray = JSONArray.fromObject(updValRecordsStr);
  this.updValRecords = (List<ValRecordModel>)JSONArray.toList(jsonArray, ValRecordModel.class);
 }

Reproduced in: https: //my.oschina.net/cjkall/blog/195884