Required request body is missing：415

{
    "timestamp": "2022-10-18T14:09:14.853+0000",
    "status": 415,
    "error": "Unsupported Media Type",
    "message": "Content type 'text/plain;charset=UTF-8' not supported",
    "path": "/product/brand/save"
}

   /**
     * 保存
     */
    @RequestMapping("/save")
    public R save(@Valid @RequestBody BrandEntity brand, BindingResult result){
        if(result.hasErrors()){
            //1.获取校验错误的结果
            Map<String, String> map = new HashMap<>();
            result.getFieldErrors().forEach((item)->{
           //FieldError获取到错误的提示
           String message = item.getDefaultMessage();
            //获取错误的属性的名字
           String field = item.getField();
           map.put(field,message);
           System.out.println("******");
       });
            return R.error(400,"提交的数据不合法").put("data",map);
        }else {
            brandService.save(brand);
            return R.ok();
        }
    }