报错信息：

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.rongrong.springboot.demo.domain.Student com.rongrong.springboot.demo.controller.StudentController.studentAddByParam(java.lang.String,java.lang.Integer,java.lang.String,java.lang.String,org.springframework.validation.BindingResult)

处理方法:BindingResult 要跟在实体类之后,
如:

@Valid Student student, BindingResult bindingResult

参考链接：https://blog.csdn.net/qq_28643817/article/details/98492052