报错：HttpMessageNotReadableException: Required request body is missing

  @PostMapping("/payment/create")
    public CommonResult create(@RequestBody Payment payment) {
        log.info("*****插入操作返回结果:" + payment);
        int result = paymentService.create(payment);
        log.info("*****插入操作返回结果:" + result);
        if(result > 0)
        {
            return new CommonResult(200,"插入数据库成功",result);
        }else{
            return new CommonResult(444,"插入数据库失败",null);
        }
    }

进行create操作时报以下错误，去掉注解@RequestBody后操作正常

```java 
  "status": 400,
    "error": "Bad Request",
    "message": "Required request body is missing: public com.pan.cloud.entities.CommonResult com.pan.cloud.controller.PaymentController.create(com.pan.cloud.entities.Payment)",
    "trace": "org.springframework.http.converter.HttpMessageNotReadableException: Required request body is missing: public com.pan.cloud.entities.CommonResult com.pan.cloud.controller.PaymentController.create(com.pan.cloud.entities.Payment)\r\n\tat