上传图片

controller类

    // 允许上传的格式 图片形式
    private static final String[] IMAGE_TYPE = new String[]{".bmp", ".jpg", ".jpeg", ".png"};

  /**
     * 单个图片上传
     */
    @PostMapping("/uploadImg")
    public AjaxResult uploadImg(@RequestParam("file") MultipartFile file, HttpServletRequest request) {
        boolean isFlag = false;
        for (String type : IMAGE_TYPE) {
            if (org.springframework.util.StringUtils.endsWithIgnoreCase(file.getOriginalFilename(), type)) {
                isFlag = true;
                break;
            }
        }

        if (isFlag) {
            PicUploadResult picUploadResult = productDisplayService.uplodadImg(file, request);
            boolean isLegal = picUploadResult.isLegal();

            if (isLegal) {
                Map resMap = new HashMap<>();
                resMap.put("imgPath", picUploadResult.getImgPath());
                return AjaxResult.success(resMap);
            } else {
                return AjaxResult.error("图片上传有误");
            }
        } else {
            return AjaxResult.error("上传的图片格式必须为:bmp,jpg,jpeg,png");
        }

    }

    /**
     * 多个图片上传
     */
    @PostMapping("/uploadManyImg")
    public AjaxResult uploadManyImg(@RequestParam("files") MultipartFile[] files, HttpServletRequest request) {
        boolean isFlag = false;
        for (MultipartFile uploadFile : files) {
            for (String type : IMAGE_TYPE) {
                if (org.springframework.util.StringUtils.endsWithIgnoreCase(uploadFile.getOriginalFilename(), type)) {
                    isFlag = true;
                    break;
                }
            }
        }

        if (isFlag) {
            PicUploadResult picUploadResult = productDisplayService.uploadManyImg(files, request);
            boolean isLegal = picUploadResult.isLegal();

            if (isLegal) {
                Map resMap = new HashMap<>();
                resMap.put("imgPaths", picUploadResult.getImgPahts());
                return AjaxResult.success(resMap);
            } else {
                return AjaxResult.error("图片上传有误");
            }
        } else {
            return AjaxResult.error("上传的图片格式必须为:bmp,jpg,jpeg,png");
        }
    }

实现方法

    //单图片上传
    public PicUploadResult uplodadImg(MultipartFile multipartFile, HttpServletRequest request) {
        return uploadImgMethod(multipartFile, request);
    }

    //多图片上传
    public PicUploadResult uploadManyImg(MultipartFile[] uploadFile, HttpServletRequest request) {
        List<String> imgPaths = new ArrayList<>();
        for (MultipartFile multipartFile : uploadFile) {
            PicUploadResult picUploadResult = uploadImgMethod(multipartFile, request);
            if(picUploadResult.isLegal()){
                imgPaths.add(picUploadResult.getImgPath());
            }else{
                return picUploadResult;
            }

        }

        PicUploadResult picUploadResult = new PicUploadResult();
        picUploadResult.setLegal(true);
        picUploadResult.setImgPahts(imgPaths);
        return picUploadResult;
    }

    /**
     * 上传图片方法类
     * @param multipartFile
     * @param request
     * @return
     */
    private PicUploadResult uploadImgMethod(MultipartFile multipartFile, HttpServletRequest request) {
        PicUploadResult picUploadResult = new PicUploadResult();

        if (multipartFile.isEmpty()) {
            //返回选择文件提示
            picUploadResult.setLegal(false);
            return picUploadResult;
        }
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd/");
        String format = sdf.format(new Date());
        //存放上传文件的文件夹
        File file = new File(baseFilePath + format);
        logger.info("-----------存放上传文件的文件夹【" + file + "】-----------");
        logger.info("-----------输出文件夹绝对路径 -- 这里的绝对路径是相当于当前项目的路径而不是“容器”路径【" + file.getAbsolutePath() + "】-----------");
        if (!file.isDirectory()) {
            //递归生成文件夹
            file.mkdirs();
        }
        //获取原始的名字  original:最初的，起始的  方法是得到原来的文件名在客户机的文件系统名称
        String oldName = multipartFile.getOriginalFilename();
        logger.info("-----------文件原始的名字【" + oldName + "】-----------");
        String newName = UUID.randomUUID().toString() + oldName.substring(oldName.lastIndexOf("."), oldName.length());
        logger.info("-----------文件要保存后的新名字【" + newName + "】-----------");
        try {
            //构建真实的文件路径
            File newFile = new File(file.getAbsolutePath() + File.separator + newName);
            //转存文件到指定路径，如果文件名重复的话，将会覆盖掉之前的文件,这里是把文件上传到 “绝对路径”
            multipartFile.transferTo(newFile);
            String filePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + "/picbook/" + UPLOAD_PATH_PREFIX + format + newName;
            logger.info("-----------【" + filePath + "】-----------");
            picUploadResult.setLegal(true);
            picUploadResult.setImgPath(filePath);
            return picUploadResult;
        } catch (Exception e) {
            e.printStackTrace();
        }
        picUploadResult.setLegal(false);
        return picUploadResult;
    }