这样方法是不是只能针对于post请求，参数为实体类的情况
如标题，这种可以返回
但如果是get请求，传字符串参数，
返回值：
{
"code": -1,
"msg": "An Errors/BindingResult argument is expected to be declared immediately after the model attribute, the @RequestBody or the @RequestPart arguments to which they apply: public com.example.demo.model.CommonMsg com.example.demo.controller.UservisitorController.SelectAll(org.springframework.validation.BindingResult)",
"data": null
}
