如何从Android发送图像的servlet，然后存放 [英] How to send an image from android to servlet and then store it

问题描述

我试图发送照片通过HTTP到我的服务器。所以，我将图像转换为字节，然后我把它作为整个一个名称值对。这里是我的下面，这样做code。现在我的问题是在服务器端，我怎么能重新和图像从字节收到字符串存储

I am trying to send a photo over http to my server. So i convert the image to bytes and then i send it across as a name value pair. Here is my code below for doing so. Now my trouble is the server side, how can i recreate and store the image from the string of bytes recieved

我也是使用Java servlet

i also am using java servlets

在Android code

Code on android

ByteArrayOutputStream baos = new ByteArrayOutputStream();
pinnedV.getPhoto().compress(Bitmap.CompressFormat.PNG, 100, baos);
byte[] b = baos.toByteArray();

List<NameValuePair> params = new ArrayList<NameValuePair>(2);
params.add(new BasicNameValuePair("photo",new String(b)));

HttpClient httpclient = new DefaultHttpClient();  
    HttpPost request = new HttpPost(URL);

    try {
        request.setEntity(new UrlEncodedFormEntity(params));
    } catch (UnsupportedEncodingException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
    }
    ResponseHandler<String> handler = new BasicResponseHandler();  
     try {  
         result = httpclient.execute(request, handler);  
     } catch (ClientProtocolException e) {  
         e.printStackTrace();  
     } catch (IOException e) {  
         e.printStackTrace();  
    }  

在服务器上code

Code on server

 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

String fromClientphoto= request.getParameter("photo");
byte[] b = fromClientphoto.getBytes();

FileOutputStream fos = new FileOutputStream("D:\\img.png");
     fos.write(b);
     fos.close(); 
}

这上面code写入一个文件，但它不会打开为图像。也就是这个字节[] B = fromClientphoto.getBytes（）; 转换回相同的字节Android手机上的正确方法是什么？任何想法？

This above code writes a file but it will not open as an image. also is this byte[] b = fromClientphoto.getBytes(); the correct way to convert back to same bytes as on the android phone? any ideas?

推荐答案

不要工具箱形象花心，只是写的内容到一个文件中。

Don't bother with the toolkit image, just write the contents out to a file..

你能张贴图片到Android之外的Servlet？设置，通过一个基本的HTML表单做同样的事伪上，分解问题成越来越小的碎片，直到你找出whhich片引起的问题...

can you post an image to the Servlet outside of android? setup a dummy page that does the same thing through a basic HTML Form, break down the problem into smaller and smaller pieces until you figure out whhich piece is causing the problem...

这篇关于如何从Android发送图像的servlet，然后存放的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！