Java 處理 multipart/mixed 請求
阿新 • • 發佈:2019-04-21
finall .post tac 文件上傳 supported null image www. method
一、multipart/mixed 請求
? multipart/mixed 和 multipart/form-date 都是多文件上傳的格式。區別在於,multipart/form-data 是一種特殊的表單上傳,其中普通字段的內容還是按照一般的請求體構建,文件字段的內容按照 multipart 請求體構建,後端在處理 multipart/form-data 請求的時候,會在服務器上建立臨時的文件夾存放文件內容,可參看這篇文章。而 multipart/mixed 請求會將每個字段的內容,不管是普通字段還是文件字段,都變成 Stream 流的方式去上傳,因此後端在處理 multipart/mixed 的內容時,必須從 Stream流中處理。
二、Servlet 處理 multipart/mixed 請求
Part signPart = request.getPart(Constants.SIGN_KEY); Part appidPart = request.getPart(Constants.APPID_KEY); Part noncestrPart = request.getPart(Constants.NONCESTR_KEY); Map<String, String[]> paramMap = new HashMap<>(8); paramMap.put(signPart.getName(), new String[]{stream2Str(signPart.getInputStream())}); paramMap.put(appidPart.getName(), new String[]{stream2Str(appidPart.getInputStream())}); paramMap.put(noncestrPart.getName(), new String[]{stream2Str(noncestrPart.getInputStream())});
private String stream2Str(InputStream inputStream) { BufferedReader reader = null; try { reader = new BufferedReader(new InputStreamReader(inputStream, "UTF-8")); String line; StringBuffer buffer = new StringBuffer(); while ((line = reader.readLine()) != null) { buffer.append(line); } return buffer.toString(); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } finally { try { reader.close(); } catch (IOException e) { e.printStackTrace(); } } return ""; }
三、SpringMVC 處理 multipart/mixed 請求
@ResponseBody
@RequestMapping(value = {"/token/user/uploadImage.yueyue", "/token/user/uploadImage"}, method = {RequestMethod.POST, RequestMethod.GET})
public AjaxList uploadImage(
@RequestPart (required = false) String token,
@RequestPart (required = false) String sign,
@RequestPart (required = false) String appid,
@RequestPart (required = false) String noncestr,
@RequestPart MultipartFile avatar, HttpServletRequest request) {
}
Java 處理 multipart/mixed 請求