请教大神这是什么原因，怎么解析json数据呢

Question

  controller：
@RequestMapping("/main")
    @ResponseBody
    public ModelAndView main(HttpServletResponse response, ModelAndView mv, HttpServletRequest request) {
        try {     
            return service.getDate();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

 <script type="text/javascript">
    $(document).ready(function() {
        $.ajax({
            type : "POST",
            url : "main",
            dataType : "json",
            success : function(data) {
                var b = "<option>请选择</option>";
                for ( var i = 1; i < data.length; i++) {
                    b += "<option value='"+data[i]+"'>" + data[i] + "</option>";
                    alert(b);
                    $("#ny").html(b);
                }
            }
        });
    });

Answer 1

使用JOSN工具类，网上有很多的将你需要的对象都能转json