@PostMapping("/bigRequestBody")
    public ResultBean postBigRequestBody(@RequestBody final UserDTO params) {
        ResultBean resultBean = new ResultBean();
        resultBean.setCode(200);
        resultBean.setData(params);
        return resultBean;
    }
test big request body.

@param params request body
@return the result of post
shenyu-examples/shenyu-examples-http-swagger3/src/main/java/org/apache/shenyu/examples/http/controller/HttpTestController.java