Test

RentExcelController.java

@RequestMapping(value = "/template/{filename}", method = {RequestMethod.GET})
	public ResponseEntity<byte[]> downloadTemplate(HttpServletRequest request, @PathVariable("filename") String filename) {
		String prefix = request.getServletContext().getRealPath(ConstantsManager.EXCEL_TEMPLATE_PATH);
		filename += ".xls";
		String filepath = prefix + "/" + filename;
		File file = new File(filepath);
		HttpHeaders headers = new HttpHeaders();
		ResponseEntity<byte[]> entity = null;
		try {
			String utfFileName = new String(filename.getBytes("UTF-8"), "iso-8859-1");
			headers.setContentDispositionFormData("attachment", utfFileName);
			headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
			entity = new ResponseEntity<byte[]>(FileUtils.readFileToByteArray(file), headers, HttpStatus.CREATED);
		} catch (UnsupportedEncodingException e) {
		    log.error("Unable to down file with UnsupportedEncoding: " + filename);
			e.printStackTrace();
		} catch (IOException e) {
		    log.error("Failed to read the file to download: " + filename);
			e.printStackTrace();
		}
		return entity;
	}