使用base64编码android将图像上传到服务器答案

【问题标题】：Upload Image to server using base64 encoding android使用base64编码android将图像上传到服务器
【发布时间】：2016-05-21 21:31:56
【问题描述】：

我正在尝试将图像字符串上传到服务器，但每次上传时都会收到一条消息，从您这边没有收到任何消息（表示空字符串）。我还检查了编码后的图像字符串，但我仍然无法上传图像的字符串。你能帮帮我吗？

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

import android.util.Log;

public class UploadImages {
     String _responseMain;
    private int serverResponseCode;

    public String upLoad2Server(String encode) {


        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;



        try {
             Log.d("encodedImage",  encode);
            URL url = new URL(ConfigImages.UPLOAD_URL);
            conn = (HttpURLConnection) url.openConnection();
            conn.setDoInput(true);
            conn.setDoOutput(true);
            conn.setUseCaches(false);
            conn.setChunkedStreamingMode(1024);



            conn.setRequestProperty("Connection", "Keep-Alive");
            conn.setRequestProperty("ENCTYPE", "multipart/form-data");
            conn.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);
            conn.setRequestMethod("POST");
            conn.connect();
            conn.connect();



            OutputStream outputStream = conn.getOutputStream();
            BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(outputStream, "UTF-8"));
            writer.write(encode);

            writer.close();
            outputStream.close();

            //Read
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8"));

            String line = null;
            StringBuilder sb = new StringBuilder();

            while ((line = bufferedReader.readLine()) != null) {
                System.out.println("Uploading............");
                sb.append(line);
            }

            bufferedReader.close();
             _responseMain = sb.toString();
            System.out.println("Response of Image Upload : " +_responseMain);


        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return _responseMain ;





    }
}

【问题讨论】：

您只是发送 base64 字符串。但是忘记将其标记为参数或文件。在这两种情况下，您都应该提供一个名称。接收者究竟期望什么？
Log.d("encodedImage", encode);。那打印什么？
(Means empty string).。不，这意味着您没有提供正确的标识符/名称。
我该如何解决？我的意思是如何将其作为文件发送？
Log.d("encodedImage", encode) 将打印编码图像的字符串

标签： android server base64

【解决方案1】：

您没有发送类似的参数名称

 {"image_code":"AAARoABQAAAAEAAAEe"}

【讨论】：

抱歉，这不是提前的。你事后感谢，就像它必须完成一样。

【解决方案2】：

我找到了答案：我用的是json格式但是我没有正确指定json的名称所以代码应该是

package Uploadvideo;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

import org.json.JSONObject;

import android.util.Log;

public class UploadImages {
     String _responseMain;
    private int serverResponseCode;
    JSONObject jsonObject;
    public String upLoad2Server(String Encode) {


         try {
             Log.d("Vicky", "encodedImage = " + Encode);
              jsonObject = new JSONObject();
             jsonObject.put("image_code", Encode);

             String data = jsonObject.toString();
             String yourURL = "URL Name";
             URL url = new URL(yourURL);
             HttpURLConnection connection = (HttpURLConnection) url.openConnection();
             connection.setDoOutput(true);
             connection.setDoInput(true);
             connection.setRequestMethod("POST");
             connection.setFixedLengthStreamingMode(data.getBytes().length);
             connection.setRequestProperty("Content-Type", "application/json;charset=UTF-8");
             OutputStream out = new BufferedOutputStream(connection.getOutputStream());
             BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(out, "UTF-8"));
             writer.write(data);
             Log.d("Vicky", "Data to php = " + data);
             writer.flush();
             writer.close();
             out.close();
             connection.connect();

             InputStream in = new BufferedInputStream(connection.getInputStream());
             BufferedReader reader = new BufferedReader(new InputStreamReader(
                     in, "UTF-8"));
             StringBuilder sb = new StringBuilder();
             String line = null;
             while ((line = reader.readLine()) != null) {
                 sb.append(line);
             }
             in.close();
             String result = sb.toString();
             Log.d("Vicky", "Response from php = " + result);
             //Response = new JSONObject(result);
             connection.disconnect();
         } catch (Exception e) {
             Log.d("Vicky", "Error Encountered");
             e.printStackTrace();
         }
        return null;




    }
}

【讨论】：