Spring - 在html隐藏字段中保存长json字符串

Question

我有一个包含隐藏输入的 html 表单。我想用 json 字符串（可能是长字符串）填充这个输入，然后在我的控制器中通过 @RequestParam 获取它。这是我的 javascript 代码（注意表单是由页面上的某个事件生成的）：

var filters = JSON.stringify("some data");
//I used console.log for print out the filters and this is ok.

$("body").append('<form target="_blank" id="excel" action="/company/excel" method="POST"></form>');
$('<input type="hidden" name="filter" value="'+filters+'" />').appendTo("#excel");
$("#excel").submit(); 

这是我的行动：

@RequestMapping(value = "company/excel", method = RequestMethod.POST)
public void companyExcelExport(@RequestParam String filter) throws IOException{
     System.out.println(filter);
}

当动作执行时，netbeans 控制台中只打印“{”。有什么问题？

我使用了console.log(filters)，它返回了我：

{"search":false,"nd":1421663503100,"rows":10,"page":1,"sidx":"","sord":"asc","pageGridColModelList":[{"name":"id","index":"id","width":150,"sortType":"integer","hidden":true,"hiddenlg":true,"stype":"text","searchoptions":{"stype":"integer","sopt":["eq","ne","lt","le","gt","ge","bw","bn","in","ni","ew","en","cn","nc"]}},{"name":"name","index":"name","width":250,"sortType":"string","hidden":false,"hiddenlg":false,"stype":"text","searchoptions":{"stype":"text","sopt":["eq","ne","lt","le","gt","ge","bw","bn","in","ni","ew","en","cn","nc"]}},{"name":"createAt","index":"createAt","width":420,"sortType":"date","hidden":false,"hiddenlg":false,"stype":"text","searchoptions":{"stype":"integer","sopt":["eq","ne","lt","le","gt","ge","bw","bn","in","ni","ew","en","cn","nc"]}}]}

Answer 1

我变了：

$('<input type="hidden" name="filter" value="'+filters+'" />').appendTo("#excel");

进入：

$('<input type="hidden" name="filter" id="filter" />').appendTo("#excel");
$("#filter").val(filters);

现在这正在工作。