Android上傳圖片(Android Studio)

Fragment介面：

private String img_src;

/**
 * 從相簿選取圖片
 */
public void selectImg() {
    Intent intent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
    intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/*");
    startActivityForResult(intent, SELECT_PHOTO);
}

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    switch (requestCode) {      
        case SELECT_PHOTO:
            switch (resultCode) {
                case RESULT_OK:
                    Uri uri = data.getData();
                    img_src = uri.getPath();//這是本機的圖片路徑
                     
                      ContentResolver cr = getActivity().getContentResolver();
                    try {
                        Bitmap bitmap = BitmapFactory.decodeStream(cr.openInputStream(uri));
                        /* 將Bitmap設定到ImageView */
                        imageView.setImageBitmap(bitmap);

                        String[] proj = {MediaStore.Images.Media.DATA};
                        CursorLoader loader = new CursorLoader(getContext(), uri, proj, null, null, null);
                        Cursor cursor = loader.loadInBackground();
                        if (cursor != null) {
                            int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
                            cursor.moveToFirst();
                      
                            img_src = cursor.getString(column_index);//圖片實際路徑

                        }
                        cursor.close();

                    } catch (FileNotFoundException e) {
                        Log.e("Exception", e.getMessage(), e);
                    }

                    break;
            }
            break;

    }
}

public void uploadImage(String path) {

    new Thread(new Runnable() {
        @Override
        public void run() {

            String uploadurl = SharedPreferencesUtil.getServerUrls(getActivity()) + "mobileqrcode/uploadsignimg.html";
            try {
                File file = new File(img_src);
                result = UploadUtil.uploadImage(file, uploadurl);
            } catch (Exception e) {
                e.printStackTrace();
            }

        }
    }).start();

}
 

上傳檔案工具類：

public class UploadUtil {
    private static final String TAG = "uploadFile";
    private static final int TIME_OUT = 10 * 1000;//超時時間
    private static final String CHARSET = "utf-8";//設定編碼

    /**
     * android上傳檔案到伺服器
     *
     * @param file       需要上傳的檔案
     * @param RequestURL  請求的url
     * @return 返回響應的內容
     */
    public static String uploadImage(File file, String RequestURL) {
       String result = "error";
       String BOUNDARY = UUID.randomUUID().toString();//邊界標識 隨機生成
        String PREFIX = "--", LINE_END = "\r\n";
       String CONTENT_TYPE = "multipart/form-data";//內容型別
        try {
           URL url = new URL(RequestURL);
           HttpURLConnection conn = (HttpURLConnection) url.openConnection();
           conn.setReadTimeout(TIME_OUT);
           conn.setConnectTimeout(TIME_OUT);
           conn.setDoInput(true);//允許輸入流
            conn.setDoOutput(true);//允許輸出流
            conn.setUseCaches(false);//不允許使用快取
            conn.setRequestMethod("POST");//請求方式
            conn.setRequestProperty("Charset", CHARSET);//設定編碼
            conn.setRequestProperty("connection", "keep-alive");
           conn.setRequestProperty("Content-Type", CONTENT_TYPE + ";boundary=" + BOUNDARY);
           conn.connect();

            if (file != null) {
                //當檔案不為空，把檔案包裝並且上傳
                DataOutputStream dos = new DataOutputStream(conn.getOutputStream());
                /*StringBuilder sb = new StringBuilder();
                sb.append(PREFIX);
                sb.append(BOUNDARY);
                sb.append(LINE_END);
                *//*
                 * 這裡重點注意：
                 * name裡面的值為伺服器端需要key,只有這個key才可以得到對應的檔案
                 * filename是檔案的名字，包含字尾名的。比如:abc.png 
                 *//*
                sb.append("Content-Disposition: form-data; name=\"inputName\"; filename=\"" + file.getName() + "\"" + LINE_END);
                //sb.append("Content-Type: application/octet-stream; charset=" + CHARSET + LINE_END);
                //sb.append("Content-Type: " + getMIMEType(file) + LINE_END);
                sb.append(LINE_END);
                dos.write(sb.toString().getBytes());*///此寫法會導致無法上傳
                  dos.writeBytes(PREFIX + BOUNDARY + LINE_END);
                dos.writeBytes("Content-Disposition: form-data; " + "name=\"inputName\";filename=\"" + file.getName() + "\"" + LINE_END);
                dos.writeBytes(LINE_END);

                FileInputStream is = new FileInputStream(file);
                byte[] bytes = new byte[1024];
                int len = -1;
                while ((len = is.read(bytes)) != -1) {
                    dos.write(bytes, 0, len);
                }
                is.close();
                dos.write(LINE_END.getBytes());

                byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINE_END).getBytes();
                dos.write(end_data);
                dos.flush();
                /*
                 * 獲取響應碼  200=成功
                 * 當響應成功，獲取響應的流  
                 */
                int res = conn.getResponseCode();
                if (res == 200) {
                    InputStream input = conn.getInputStream();
                    StringBuilder sbs = new StringBuilder();
                    int ss;
                    while ((ss = input.read()) != -1) {
                        sbs.append((char) ss);
                    }
                    result = sbs.toString();
                    Log.i(TAG, "result------------------>>" + result);
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return result;
    }

    private static String getMIMEType(File file) {
        String fileName = file.getName();
        if (fileName.endsWith("png") || fileName.endsWith("PNG")) {
            return "image/png";
        } else {
            return "image/jpg";
        }
    }
}
 

Java端接收圖片(Eclipse)

@RequestMapping(value = "/uploadsignimg", method = RequestMethod.POST)
 public void uploadOrderSignImage(HttpServletRequest request, HttpSession session, HttpServletResponse response) {
  try {
   MultipartHttpServletRequest rq = (MultipartHttpServletRequest) request;
   Map<String, MultipartFile> file_list = rq.getFileMap();
  
   if (file_list != null && file_list.size() > 0) {
    if (file_list.containsKey("inputName")) {
     MultipartFile file = file_list.get("inputName");
     if (file != null) {
      // 儲存訂單簽收圖片
      String fileName = file.getOriginalFilename();
      String newFileName = "";
      String[] desp = fileName.split("\\.");
      if (desp != null && desp.length > 0) {
       String extendName = desp[desp.length - 1];
       newFileName = new Date().getTime() + "." + extendName;
       ServletContext servletContext = request.getSession().getServletContext();
       String uploadPath = servletContext.getRealPath("/") + "upload\\";
       File saveFile = new File(uploadPath, newFileName);
       file.transferTo(saveFile);
      }
      session.setAttribute("newfilename", newFileName);
     }
    }
   }
  } catch (Exception e) {
   e.printStackTrace();
  }
 }