Question

我目前正在android上传文件。现在我想发送一些数据让我们说和ID与该文件上传。所以我将在服务器端处理这个ID。这是我上传文件的方式。这段代码非常合适。

这是代码

public int uploadFile(String sourceFileUri, final String imageName) {
    //Toast.makeText(getApplicationContext(), imageName, Toast.LENGTH_LONG).show();
    String upLoadServerUri = "http://www.example.com/android/fileupload.php";
    String fileName = sourceFileUri;
    //Toast.makeText(getApplicationContext(), sourceFileUri, Toast.LENGTH_LONG).show();
    HttpURLConnection conn = null;
    DataOutputStream dos = null;
    String lineEnd = "\r\n";
    String twoHyphens = "--";
    String boundary = "*****";
    int bytesRead, bytesAvailable, bufferSize;
    byte[] buffer;
    int maxBufferSize = 1 * 1024 * 1024;

    File sourceFile = new File(sourceFileUri);
    if (!sourceFile.isFile()) {
        Log.e("uploadFile", "Source File Does not exist");
        return 0;
    }

    try { 
        // open a URL connection to the Servlet
        FileInputStream fileInputStream = new FileInputStream(sourceFile);
        URL url = new URL(upLoadServerUri);
        conn = (HttpURLConnection) url.openConnection(); // Open a HTTP  connection to  the URL
        conn.setDoInput(true); // Allow Inputs
        conn.setDoOutput(true); // Allow Outputs
        conn.setUseCaches(false); // Don't use a Cached Copy
        conn.setRequestMethod("POST");
        conn.setRequestProperty("Connection", "Keep-Alive");
        conn.setRequestProperty("ENCTYPE", "multipart/form-data");
        conn.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);
        conn.setRequestProperty("uploaded_file", fileName);
        dos = new DataOutputStream(conn.getOutputStream());

        dos.writeBytes(twoHyphens + boundary + lineEnd);
        dos.writeBytes("Content-Disposition: form-data; name=\"uploaded_file\";filename=\""+ fileName + "\"" + lineEnd);
        dos.writeBytes(lineEnd);

        bytesAvailable = fileInputStream.available(); // create a buffer of  maximum size

        bufferSize = Math.min(bytesAvailable, maxBufferSize);
        buffer = new byte[bufferSize];

         // read file and write it into form...
        bytesRead = fileInputStream.read(buffer, 0, bufferSize);  

        while (bytesRead > 0) {
             dos.write(buffer, 0, bufferSize);
             bytesAvailable = fileInputStream.available();
             bufferSize = Math.min(bytesAvailable, maxBufferSize);
             bytesRead = fileInputStream.read(buffer, 0, bufferSize);
        }

        // send multipart form data necesssary after file data...
        dos.writeBytes(lineEnd);
        dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);

        // Responses from the server (code and message)
        serverResponseCode = conn.getResponseCode();
        String serverResponseMessage = conn.getResponseMessage();

        Log.i("uploadFile", "HTTP Response is : " + serverResponseMessage + ": " + serverResponseCode);
        if(serverResponseCode == 200){
            runOnUiThread(new Runnable() {
                 public void run() {
                     //tv.setText("File Upload Completed.");
                     if(fileData(globalUID, imageName)) {
                         Toast.makeText(Camera.this, "File Upload Complete.", Toast.LENGTH_SHORT).show();
                     }
                 }
            });
        }
        //close the streams //
        fileInputStream.close();
        dos.flush();
        dos.close();

    } catch (MalformedURLException ex) {
        dialog.dismiss();
        ex.printStackTrace();
        Toast.makeText(Camera.this, "MalformedURLException", Toast.LENGTH_SHORT).show();
        Log.e("Upload file to server", "error: " + ex.getMessage(), ex);
    } catch (Exception e) {
        dialog.dismiss();
        e.printStackTrace();
        Toast.makeText(Camera.this, "Exception : " + e.getMessage(), Toast.LENGTH_SHORT).show();
        Log.e("Upload file to server Exception", "Exception : " + e.getMessage(), e);
    }

    dialog.dismiss();
    return serverResponseCode;
}

Answer 1

您可以将查询字符串写入输出流。

OutputStream os = conn.getOutputStream();
os.write( yourQueryString.getBytes( withSpecificCharset ) );

在服务器php脚本中，您可以照常读取查询参数。

$param1 = $_POST[ "param1" ];

您可以在BalusC上参考community wiki answer的How to use java.net.URLConnection to fire and handle HTTP requests?。它讨论了带有文件上传和查询参数的HTTP Post示例。

如何将带有文件上传的数据发送到服务器

1 个答案: