/**
     * 寫(xiě)注釋是個(gè)好習(xí)慣
     *
     * @param mFile
     * @param accountIndex
     * @param exportType
     * @param clear
     * @param email
     * @param dimensions
     * @return
     * @throws IOException
     */
    public String upload(MultipartFile mFile, Integer accountIndex, String exportType,
                         Boolean clear, String email, String dimensions) throws IOException {
        // 這里是MultipartFile轉(zhuǎn)File的過(guò)程
        File file = new File(Objects.requireNonNull(mFile.getOriginalFilename()));
        FileUtils.copyInputStreamToFile(mFile.getInputStream(), file);
        // url接口路徑
        String url = "http://localhost:8080/upload";
        // file是要上傳的文件 File()  這邊我上傳的是excel，其他類(lèi)型可以自己改這個(gè)parse
        RequestBody fileBody = RequestBody.create(MediaType.parse("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"), file);//這邊是把file寫(xiě)進(jìn)來(lái)，也有寫(xiě)路徑的，但我這邊是寫(xiě)file文件，parse不行的話(huà)可以直接改這個(gè)"multipart/form-data"
        // 創(chuàng)建OkHttpClient實(shí)例,設(shè)置超時(shí)時(shí)間
        OkHttpClient okHttpClient = new OkHttpClient.Builder()
                .connectTimeout(60L, TimeUnit.SECONDS)
                .writeTimeout(60L, TimeUnit.SECONDS)
                .readTimeout(60L, TimeUnit.SECONDS)
                .build();
        // 不僅可以支持傳文件，還可以在傳文件的同時(shí)，傳參數(shù)
        MultipartBody requestBody = new MultipartBody.Builder()
                .setType(MultipartBody.FORM) // 設(shè)置傳參為form-data格式
                .addFormDataPart("account_index", String.valueOf(accountIndex))
                .addFormDataPart("export_type", exportType)
                .addFormDataPart("clear", String.valueOf(clear))
                .addFormDataPart("email", email)
                .addFormDataPart("dimensions", dimensions)
                .addFormDataPart("file", file.getName(), fileBody) // 中間參數(shù)為文件名
                .build();

        // 構(gòu)建request請(qǐng)求體，有需要傳請(qǐng)求頭自己加
        Request request = new Request.Builder()
                .url(url)
                .post(requestBody)
                .build();
        Response response = null;
        String result = "";
        try {
            // 發(fā)送請(qǐng)求
            response = okHttpClient.newCall(request).execute();
            result = response.body().string();
            log.info(url + "發(fā)送請(qǐng)求結(jié)果:" + result);
            if (!response.isSuccessful()) {
                log.info("請(qǐng)求失敗");
                return "請(qǐng)求失敗";
            }
            response.body().close();
        } catch (IOException e) {
            log.error(e.getMessage());
        }
        // 會(huì)在本地產(chǎn)生臨時(shí)文件，用完后需要?jiǎng)h除
        if (file.exists()) {
            file.delete();
        }
        return result;
    }

(@RequestPart("file") MultipartFile file,
@RequestParam("accountIndex") Integer accountIndex,
@RequestParam("exportType") String exportType,
@RequestParam(value = "clear", required = false) Boolean clear,
@RequestParam("email") String email,
@RequestParam(value = "dimensions", required = false) String dimensions)

(@RequestPart("file") MultipartFile file, RequestVo req)