Springboot File Upload Download

Key points:

1, using the POST request
2,consumes=mediatype.multipart_from_data_value
3, the string inside the @RequestParm is consistent with the name value of the front input control

Examples of uploading files:

@PostMapping (value= "/photos", consumes=mediatype.multipart_from_data_value)publicVoid  throws  exception{    //  Save file    new fileoutputstream ("target/ ", Imgfile.getoriginalfilename ());    Ioutils.copy (Imgfile.getinputstream (), FOS);    Fos.close ();  }

Sample upload file with return value (return binary data to let users see what the uploaded image looks like):

@PostMapping (value= "/icon", consumes=mediatype.multipart_from_data_value) PublicByte[] AddIcon (@RequestParm ("photo") Multipartfile Imgfile)throwsexception{//binary data for user-uploaded filesInputStream is=Imgfile.getinputstream (); //Save FileFileOutputStream Fos=NewFileOutputStream ("target/", Imgfile.getoriginalfilename ());     Ioutils.copy (is, FOS);     Fos.close (); //return file     returnIoutils.tobytearray (IS); }

Sample Download File:

@GetMapping (value= "/{userid}/photos", consumes=mediatype.multipart_from_data_value) Public voidthrows  exception{       //  return file       String userphotoimgsrc = "src/test/ 10001.jpg ";        New FileInputStream (USERPHOTOIMGSRC);        return Ioutils.tobytearray (IS);}

Springboot File Upload Download