Springboot通过图片路径形式获取图片

@RequestMapping(value = "/getPhoto/{imgUrl:[a-zA-Z0-9_.]+}", produces = MediaType.IMAGE_JPEG_VALUE)
@ResponseBody
public byte[] getPhoto(@PathVariable("imgUrl") String imgUrl) {
  File file = new File("D:/test.jpg");
  FileInputStream inputStream = new FileInputStream(file);
  byte[] bytes = new byte[inputStream.available()];
  inputStream.read(bytes, 0, inputStream.available());
  return bytes;
}