ajax springmvc接收不到数据

后台

@RequestMapping(value = "getAllChildByRId", method = RequestMethod.GET)
    public ModelAndView getAllChildByRId(String rId, Model model) {
        XLog.showLogInfo("rId = " + rId);
        ModelAndView modelAndView = new ModelAndView();
        try {
            List<ChildAndPropertyAndContent> list = mainService.getChildAndPropertyAndContent(rId);
            XLog.showLogInfo("list = " + list);
            modelAndView.addObject("rId", rId);
            modelAndView.addObject("list", list);
            modelAndView.addObject("childSize", list.size());
            /*if (list.size() == 0)
                modelAndView.setViewName("/index");
            else*/
            modelAndView.setViewName("/main");
        } catch (Exception e) {
            modelAndView.addObject("error", e.getMessage());
            modelAndView.setViewName("/main");
            e.printStackTrace();
        }
        XLog.showLogInfo("modelAndView.getViewName()" + modelAndView.getViewName());
        return modelAndView;
    }

前台:

$.ajax({
            type: "GET",
            url: "<%=basePath%>main/getAllChildByRId?rId=" + id + "",
            async: false,
            dataType: "text",
            success: function (data) {
                window.location.href = data;
                /*if ("${childSize}" > 0) {
                } else {
                    layer.msg("该节点下没有节点");
                }*/
            },
            error: function () {

            }
        });

前台接收不到数据主要是dataType没有设置正确,同时应该减产ajax请求类型是否和后台一致