如何在服务器上显示或使用从 Android 手机接收的图像

Question

我正在从 Android 手机发送图像到处理它的服务器，但现在我对如何在服务器中使用图像感到困惑我

发送图像的 Android 手机代码是

                            Log.i("sAMPLE","Info:" );
                //String postURL = HOST_SERVER_URL + HOST_PHOTO_UPLOAD_URI;
                String postURL ="http://10.0.2.2:8080/SimpleServlet/simple-servlet";//server URL
                HttpClient httpClient = new DefaultHttpClient();
                HttpPost postRequest = new HttpPost(postURL);

                ByteArrayBody bab = new ByteArrayBody(imageBytes, "file_name_ignored");
                MultipartEntity reqEntity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
                reqEntity.addPart("source", bab);
                postRequest.setEntity(reqEntity);

                HttpResponse response = httpClient.execute(postRequest); 

，处理服务器中图像的代码是像这样

        protected void doPost(HttpServletRequest req, HttpServletResponse resp)
                throws ServletException, IOException {
    boolean isMultipart = ServletFileUpload.isMultipartContent(req);
    System.out.println("Before Mutlipart");
    if(!isMultipart)
        throw new ServletException("upload using multipart");

    ServletFileUpload upload = new ServletFileUpload(fif);
    upload.setSizeMax(1024 * 1024 * 10 /* 10 mb */);
    List<FileItem> items;
    try {
        items = upload.parseRequest(req);
    //}// catch (FileUploadException e) {
      //  throw new ServletException(e);
    } catch (FileUploadException e) {
        // TODO Auto-generated catch block
        throw new ServletException(e);
    }

    if(items == null || items.size() == 0)
        throw new ServletException("No items uploaded");

    FileItem item = items.get(0);
    //BufferedImage Img=item.getString();
    System.out.println(item.getContentType());
    byte[]data=item.get();

现在我如何使用字节数组在服务器上显示图像或使用其他一些东西（如字符串、其他图像等）编辑图像。

Answer 1

我认为这应该适合你...

http://www.mkyong.com/java/how-to-convert-byte-to-bufferedimage-in-java/

在服务器端（imageInByte 是你的数据[]）...

//convert byte array back to BufferedImage
InputStream in = new ByteArrayInputStream(imageInByte);
BufferedImage bImageFromConvert = ImageIO.read(in);

ImageIO.write(bImageFromConvert, "jpg", 
         new File("c:\\image\\mypic_new.jpg"));