Project training—attachment upload

Attachment uploading is similar to image uploading, and it is used in knowledge base and topic center

How to upload files:

In order to make the file upload successfully and prevent file upload failure with the same name, rename the file name and get the current milliseconds as the name

@RequestMapping("/fileUpload.action")
    public Map<String, Object> fileUpload(MultipartHttpServletRequest multirequest) {


        String realPath = AbsolutePathUtil.getAbsoluteStaticPath() + urlConfig.getFileUpload_Url();
        Map<String, Object> map = new HashMap<>();
        Iterator<String> itr = multirequest.getFileNames();
        if (itr.hasNext()) {
            MultipartFile multipartFile = multirequest.getFile(itr.next());
            long size = multipartFile.getSize();
            if (size > MAX_FILE_MAX) {
                map.put("code", CodeEnum.BUSSINESSERROR);
                map.put("msg", "文件不能超过10M");
                return map;
            }
            String fileName = multipartFile.getOriginalFilename();
            String suffix = fileName.substring(fileName.lastIndexOf(".") + 1);
            if (!"zip".equalsIgnoreCase(suffix) && !"rar".equalsIgnoreCase(suffix)) {
                map.put("code", CodeEnum.BUSSINESSERROR);
                map.put("msg", "只能ZIP或RAR文件");
                return map;
            }
            String current = String.valueOf(System.currentTimeMillis());

//            System.currentTimeMillis()产生一个当前的毫秒，这个毫秒其实就是自1970年1月1日0时起的毫秒数，Date()其实就是相当于
            fileName = current + "." + suffix;
            File dir = new File(realPath);
            if (!dir.exists()) {
                dir.mkdirs();
            }
            String filePath = realPath + "/"+fileName;
            File file = new File(filePath);
            try {
                multipartFile.transferTo(file);
                map.put("code", CodeEnum.SUCCESS);
                map.put("savePath", urlConfig.getFileUpload_Url()+"/"+fileName);
                System.out.println(map.get("savePath"));
                return map;
            } catch (Exception e) {
                map.put("code", CodeEnum.SERVERERROR);
                map.put("msg", "服务器异常,上传失败");
                return map;
            }
        }
        return map;
    }

Delete Files:

@RequestMapping("/fileDelete.action")
public Map<String, Object> fileDelete(String fileName) {
    Map<String, Object> map = new HashMap<>();
    File file = new File(AbsolutePathUtil.getAbsoluteStaticPath()+fileName);
    try {
        if (file.exists()) {
            file.delete();
        }
        map.put("code", CodeEnum.SUCCESS);
        return map;
    } catch (Exception e) {
        map.put("code", CodeEnum.SERVERERROR);
        map.put("msg", "服务器异常,删除失败");
        return map;
    }
}