ajax请求springboot

老是忘记ajax请求格式，记录一下吧后面看自己的
function save(){
    var URL = "/reconciliation/wzglWzMaterilApplicationDetail/saveSupplier";
    var cc=JSON.stringify({
            data: "world",
            p: {
                pag: 0,
                pageSize: 0,
                total: 0
            },
            token: "string"
        });
    $.ajax({
        type: "post",
        contentType: "application/json",//必须项
        dataType: "json",//必须项
        data: cc,
        // async: true,
        url: URL,
        success: function (res) {
            console.log(res);
        },
        error: function (err) {
            console.log("请求失败", err.statusText);
        }
    });
}

/**

 * springboot后台
 */
@ResponseBody
@RequestMapping(value = "/saveSupplier", produces={MediaType.APPLICATION_JSON_VALUE}, consumes={MediaType.APPLICATION_JSON_VALUE},  method=RequestMethod.POST)
public HashMap saveSupplier(@RequestBody HashMap[] json) {
   HashMap map=new HashMap();
   map.put("id","2");
   map.put("applyform_id","applyform_id");
   map.put("material_id","material_id");
   map.put("supplier","supplier");
   return map;
}