Post a BLOB image using Ajax and receive using Spring Boot

Question

I'm trying to post an BLOB image using ajax. But spring controller is receiving a null value instead.

Here is my controller.

@RequestMapping(value = "/uploadAvatar", method = RequestMethod.POST)
public @ResponseBody List<Long> uploadAvatar(byte[] avatar) {
    // avatar is null here

    // do some stuff
}

And here is the ajax part.

    var avatar = // some BLOB data
    var fd = new FormData();
    fd.append('fname', 'avatar.png');
    fd.append('avatar', avatar);

    $.ajax({
        url: '/uploadAvatar',
        type: 'POST',
        data: fd,
        cache: false,
        processData: false,
        contentType: false,
        success: applySuggestions,
    });

Seamas · Accepted Answer · 2017-01-22 05:12:45Z

1

you need MultipartFile to receive file.

@RequestMapping(value = "/uploadAvatar", method = RequestMethod.POST)
public @ResponseBody List<Long> uploadAvatar(@RequestParam MultipartFile  avatar) {
    byte[] bytes = avatar.getBytes();
}

answered Jan 22, 2017 at 5:12

Seamas

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