在實際開發中，經常會遇到上傳檔案到伺服器的操作，因此在這裡就舉一個簡單的例子

public class PathUtils {

    public static String getFolderPath(){
        String path = System.getProperty("user.dir");
        File file = new File(path);
        File parentFile = file.getParentFile();
        path = parentFile.getPath() + "/" + "xcFile";
        return
 
 path;
    }
}

public Result<?> uploadFile(MultipartFile multipartFile, HttpServletRequest request) throws ParserConfigurationException, TransformerException, IOException {
        if(multipartFile == null){
            return Result.newFaild("檔案資訊不完整!");
        }
        //獲取工程上傳資料夾相對路徑
        String path = PathUtils.getFolderPath
 
();
        String contextPath = path + "/" + fileType;
        if(!multipartFile.isEmpty()){
            String fileName = multipartFile.getOriginalFilename();
            try {
                File tempFile = new File(contextPath);
                if (!tempFile.exists()) {
                    tempFile.mkdirs
 
();
                }
                String[] strs = fileName.split("\\.");
                if (strs.length < 2) {
                    return Result.newFaild("檔案沒有副檔名");
                }
                String extensionName = "." + strs[strs.length - 1];
                contextPath += "/" +StringUtil.toHexString(fileName.replace(extensionName, ""))
                 + extensionName;
                BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(
                        new File(contextPath)));
                out.write(multipartFile.getBytes());
                out.flush();
                out.close();
            } catch (FileNotFoundException e) {
                e.printStackTrace();
                return Result.newFaild("上傳失敗," + e.getMessage());
            } catch (IOException e) {
                e.printStackTrace();
                return Result.newFaild("上傳失敗," + e.getMessage());
            }
        }else {
            return Result.newFaild("檔案不可為空!");
        }
        return Result.newSuccess("上傳成功!");
    }