java中图片上传

public Map<String, String> fileUpload(HttpServletRequest request,
      User user) throws IOException {
   String uploadBasePath = UploadConstant.FILE_UPLOAD_BASE_PATH;
   
   Calendar date = Calendar.getInstance();
   int year = date.get(Calendar.YEAR);
   int month = date.get(Calendar.MONTH)+1;
   int day = date.get(Calendar.DAY_OF_MONTH);
   String type = request.getParameter("imgType");
   String relativePath = tempUploadImage + "/" + year +"/"+ month +"/" +day+ "/"+type+"/";
       String uploadPath = uploadBasePath + relativePath;
   Map<String, String> uploadResult = UpDownFileUtil.multiFileUpload(request, uploadPath);
   for (String imagePath : uploadResult.keySet()) {
      uploadResult.put(imagePath, uploadResult.get(imagePath).replace(new File(uploadBasePath).getPath(), "").replaceAll("\\\\", "/"));
   }
   String imagePaths = uploadResult.toString();
   
   imagePaths = imagePaths.substring(1, imagePaths.length()-1);
   String[] imagePathArray = imagePaths.split(",");
   if(imagePathArray.length <= 1){
      String[] image = imagePathArray[0].split("=");
      uploadResult.put("theImgName", image[0]);
      uploadResult.put("theImgPath", image[1]);
   }
   return uploadResult;
}

以下方法都存放在上传文件工具类中

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//多文件上传

public static Map<String, String> multiFileUpload(HttpServletRequest request, String basePath) throws IllegalStateException, IOException {

   File baseFile = new File(basePath);
    //判断文件是否存在
    if(!baseFile.exists()){
       
        baseFile.mkdirs(); //mkdirs()方法可以建好一个完整的路径. mkdir()  只能在已经存在的目录中创建创建文件夹。 

    }
   
    //检查一个对象是否是文件夹
    if (!baseFile.isDirectory()) {
        throw new IllegalArgumentException("basePath 参数必须是文件夹路径");
    }
    return multifileUploadAssist(request, basePath, null);
}

//多文件上传辅助
private static Map<String, String> multifileUploadAssist(HttpServletRequest request, String basePath, String exclude) throws IOException {

    exclude = exclude == null ? "" : exclude;

    Map<String, String> filePaths = new HashMap<String, String>();
    File file = null;
    // 创建一个通用的多部分解析器
    CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver(request.getSession().getServletContext());
    // 判断 request 是否有文件上传,即多部分请求
    if (multipartResolver.isMultipart(request)) {
        // 转换成多部分request
        MultipartHttpServletRequest multiRequest = (MultipartHttpServletRequest) request;
        // get the parameter names of the MULTIPART files contained in this request
        Iterator<String> iter = multiRequest.getFileNames();
        while (iter.hasNext()) {
            // 取得上传文件
            List<MultipartFile> multipartFiles = multiRequest.getFiles(iter.next());
            for (MultipartFile multipartFile : multipartFiles) {
                String fileName = multipartFile.getOriginalFilename();
                if (StringUtils.isNotEmpty(fileName) && (!exclude.contains(fileName))) {
                    file = new File(basePath + changeFilename2UUID(fileName));
                    filePaths.put(fileName, file.getPath());
                    multipartFile.transferTo(file);
                }
            }
        }
    }
    return filePaths;
}