Return a file from Controller in Spring

May be this will help

@RequestMapping(method = RequestMethod.GET,value = "/getfile")
public @ResponseBody 
void getReviewedFile(HttpServletRequest request, HttpServletResponse response, @RequestParam("fileName") String fileName)
{
    //do other stuff
    byte[] file = //get your file from the location and convert it to bytes
    response.reset();
    response.setBufferSize(DEFAULT_BUFFER_SIZE);
    response.setContentType("image/png"); //or whatever file type you want to send. 
    try {
        response.getOutputStream().write(image);
    } catch (IOException e) {
        // Do something
    }
}

Thanks to @JAR.JAR.beans. Here is the link: Downloading a file from spring controllers

@RequestMapping(value = "/files/{file_name}", method = RequestMethod.GET)
@ResponseBody 
public FileSystemResource getFile(@PathVariable("file_name") String fileName) {
    return new FileSystemResource(myService.getFileFor(fileName)); 
}