//멤버변수들
	private	String saveDirectory = "f:\\files";
	private int s_width=100;
	private int s_height=100;
	Logger log = Logger.getLogger(this.getClass())
    //



	@PostMapping("board/write")
	public ResponseEntity<?> write(@RequestPart(name = "letterFiles") List<MultipartFile> paramLetterFiles,
								   @RequestPart(name = "imageFile") MultipartFile paramImageFile, 
								   RepBoard repBoard) {

		log.info("요청전달데이터 title=" + repBoard.getBoardTitle() + ", content=" + repBoard.getBoardContent());
		log.info("letterFiles.size()=" + paramLetterFiles.size());
		log.info("imageFile.getSize()=" + paramImageFile.getSize());
		// 임시유저
		Customer testUser = new Customer();
		testUser.setId("id1");
		testUser.setName("김치");

		// 파일 경로생성
		if (!new File(saveDirectory).exists()) {
			log.info("업로드 실제경로생성");
			new File(saveDirectory).mkdirs();
		}

		
		// 1. Add DATABASE
		try {
			repBoard.setBoardC(testUser);
			service.add(repBoard);
		} catch (AddException e1) {
			return new ResponseEntity<>(HttpStatus.INTERNAL_SERVER_ERROR);
		}



		// 2.Save List<letter> File
		for (MultipartFile mf : paramLetterFiles) {
			log.info("파일크기: " + mf.getSize() + ", 파일이름:" + mf.getOriginalFilename());
			String mfFileName = repBoard.getBoardNo() + "_letter_" + UUID.randomUUID() + "_" + mf.getOriginalFilename();

			try {
				FileCopyUtils.copy(mf.getBytes(), new File(saveDirectory, mfFileName));
			} catch (IOException e) {
				e.printStackTrace();
				return new ResponseEntity<>(HttpStatus.INTERNAL_SERVER_ERROR);
			}
		}
		
		
		
		// 3. Save image FiLe
		boolean isSavedImageFileComplete = false;
		boolean isImageFile = paramImageFile.getContentType().contains("image/");

		if (!isImageFile){ 
			return new ResponseEntity<>(HttpStatus.INTERNAL_SERVER_ERROR);
		}
		log.info("파일크기: " + paramImageFile.getSize() + ", 파일이름:" + paramImageFile.getOriginalFilename());
		String imageFileName = repBoard.getBoardNo() + "_image_" + UUID.randomUUID() + "_"
				+ paramImageFile.getOriginalFilename(); // 저장할 파일이름을 지정한다 ex) 글번호_image_XXXX_원본이름
														// ex) 0_image_ddf269da-3202-447a-a2c5-7ce395b63887_문어.png

		File createdImagefile = new File(saveDirectory, imageFileName);
		try {
			FileCopyUtils.copy(paramImageFile.getBytes(), createdImagefile);
			isSavedImageFileComplete = true;
			log.info("이미지파일 저장:" + createdImagefile.getAbsolutePath() + ", 이미지파일 크기:" + createdImagefile.length());
		} catch (IOException e1) {
			e1.getStackTrace();
			return new ResponseEntity<>(HttpStatus.INTERNAL_SERVER_ERROR);
		}
		
		
		
		// 4. Save Thumbnail imageFile
		String thumbnailName = "s_" + repBoard.getBoardNo() + paramImageFile.getOriginalFilename(); // 섬네일 파일명은
		File thumbnailFile = new File(saveDirectory, thumbnailName);
		try {
			//이미지 파일이 있어야 썸네일 생성가능
			if(!isSavedImageFileComplete) {throw new IOException();}

			FileOutputStream thumbnailOS = new FileOutputStream(thumbnailFile);
			InputStream imageFileIS = paramImageFile.getInputStream();
			Thumbnailator.createThumbnail(imageFileIS, thumbnailOS, s_width, s_height);
			log.info("섬네일파일 저장:" + thumbnailFile.getAbsolutePath() + ", 섬네일파일 크기:" + thumbnailFile.length());
		} catch (IOException e) {
			e.printStackTrace();
			return new ResponseEntity<>(HttpStatus.INTERNAL_SERVER_ERROR);
		}
		
		
		
        //5. 이미지 썸네일 프론트로 다시 전송해주기
		HttpHeaders responseHeaders = new HttpHeaders();
		try {
			responseHeaders.set(HttpHeaders.CONTENT_LENGTH, thumbnailFile.length() + "");
			responseHeaders.set(HttpHeaders.CONTENT_TYPE, Files.probeContentType(thumbnailFile.toPath()));
			responseHeaders.set(HttpHeaders.CONTENT_DISPOSITION, "inline; filename=" + URLEncoder.encode("a", "UTF-8"));
			log.info("섬네일파일 다운로드");
			return new ResponseEntity<>(FileCopyUtils.copyToByteArray(thumbnailFile), responseHeaders, HttpStatus.OK);
		} catch (IOException e) {
			e.printStackTrace();
			return new ResponseEntity<>(HttpStatus.INTERNAL_SERVER_ERROR);
		}



        // 기존 RETURN 주석처리 하기
		//return new ResponseEntity(HttpStatus.OK);
	}