spring convert buffered image into response entity

Question

I have BufferedImage in my spring boot application. Now I want to send that file to user. How can I do that ?

I'm looking for method to convert BufferedImage into ResponseEntity.

Answer 1

you can also convert it to byte[] using javax.imageio.ImageIO

ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
ImageIO.write(bufferedImage , "png", byteArrayOutputStream);

byte[] imageInByte = baos.toByteArray();

then you controller is simplified:

@RequestMapping(value = "/path", method = GET)
public ResponseEntity<byte[]> getResource() {

   return ResponseEntity.status(HttpStatus.OK)
            .header(HttpHeaders.CONTENT_DISPOSITION, "filename=\"image.png"\")
            .contentType(MediaType.IMAGE_PNG)
            .body(imageInByte);