public void imgUpload(HttpServletRequest request,
   HttpServletResponse response, MultipartFile image)
   throws IOException {   JsonObject json = new JsonObject();
  byte[] bs = image.getBytes();
  int stateInt = 1;
  if (bs.length > 0) {
   try {
    String filePath = "儲存路徑";
    System.out.println("開始上傳");
    File validateCodeFolder = new File(filePath);
    if (!validateCodeFolder.exists()) {
     validateCodeFolder.mkdirs();
    }
    // 將字串轉換成二進位制，用於顯示圖片
    // 將上面生成的圖片格式字串 imgStr，還原成圖片顯示
    String type = ".jpg";
    String uuid =隨機；
    String filename = uuid + type;
    InputStream in = new ByteArrayInputStream(bs);
    File file = new File(filePath, filename);// 可以是任何圖片格式.jpg,.png等
    FileOutputStream fos = new FileOutputStream(file);
    byte[] b = new byte[1024];
    int nRead = 0;
    while ((nRead = in.read(b)) != -1) {
     fos.write(b, 0, nRead);
    }
    fos.flush();
    fos.close();
    in.close();
    System.out.println("上傳成功");     ;
   
    json.addProperty("code", 200);
    json.addProperty("msg", 返回給app的路徑);     String str = json.toString();
    response.setCharacterEncoding("utf-8");
    response.setHeader("content-type", "text/html;charset=UTF-8");
    response.getWriter().write(str);
    response.getWriter().flush();
    response.getWriter().close();
   } catch (Exception e) {
    stateInt = 0;
    e.printStackTrace();
   } finally {
   }
  } else {
   System.out.println("上傳失敗");
  }
 } spring-mvc.xml： <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
   <property name="defaultEncoding" value="UTF-8" />
  <property name="maxUploadSize">
  <value>5242880</value>
  </property>
 </bean> type寫成固定的gpg格式了，也可以通過request.getParameter("")屬性獲取這個type型別 主要是用的MultipartFile元件，需要在spring-mvc配置這個元件     image.getBytes()獲取圖片二進位制流，放到一個byte數組裡面 地址路徑根據自己的需求自己配置