the front-end page uses vue+element-ui, and the back-end uses jfinal

added enctype= "multipart/form-data" method= "post"

backend uses UploadFile file=getFile (); get
I don"t know what"s wrong, and always report
Posted content type isn"t multipart/form-data error

it is useless to change the request header, and in the project, other methods are also used to upload files.
but there is no error, so there is no
solution here.
Thank you all for your bosses