Java 将图片从Android上传到PHP服务器

我正在尝试从我的android设备上传文件到php服务器。有人问了同样的问题，但他用的是不同的方法。我的Android端代码工作正常，并没有显示错误消息，但服务器并没有收到任何文件。这是我的示例代码，我在网上找到的

import java.io.FileInputStream;
import android.app.Activity;
import android.os.Bundle;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import android.util.Log;

public class uploadfile extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    doFileUpload();
}

private void doFileUpload(){
HttpURLConnection conn =    null;
DataOutputStream dos = null;
DataInputStream inStream = null;    
String exsistingFileName = "/sdcard/def.jpg";

// Is this the place are you doing something wrong.
String lineEnd = "rn";
String twoHyphens = "--";
String boundary =  "*****";

int bytesRead, bytesAvailable, bufferSize;
byte[] buffer;
int maxBufferSize = 1*1024*1024;
String responseFromServer = "";
String urlString = "http://192.168.1.6/index.php";

try
    {
        //------------------ CLIENT REQUEST 
        Log.e("MediaPlayer","Inside second Method");
        FileInputStream fileInputStream = new FileInputStream(new    File(exsistingFileName) );

                                        // open a URL connection to the Servlet
                                        URL url = new URL(urlString);

                                        // Open a HTTP connection to the URL
                                        conn = (HttpURLConnection) url.openConnection();

                                        // Allow Inputs
                                        conn.setDoInput(true);

                                        // Allow Outputs
                                        conn.setDoOutput(true);

                                        // Don't use a cached copy.
                                        conn.setUseCaches(false);

                                        // Use a post method.
                                        conn.setRequestMethod("POST");
                                        conn.setRequestProperty("Connection", "Keep-Alive");
                                        conn.setRequestProperty("Content-Type", "multipart/form-data;boundary="+boundary);

                                        dos = new DataOutputStream( conn.getOutputStream() );
                                        dos.writeBytes(twoHyphens + boundary + lineEnd);
                                        dos.writeBytes("Content-Disposition: form-data; name=\"uploadedfile\";filename=\""
                                                            + exsistingFileName + "\"" + lineEnd);
                                        dos.writeBytes(lineEnd);
                                        Log.e("MediaPlayer","Headers are written");

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

                                        // close streams
                                        Log.e("MediaPlayer","File is written");
                                        fileInputStream.close();
                                        dos.flush();
                                        dos.close();

                    }

      catch (MalformedURLException ex)

     {

           Log.e("MediaPlayer", "error: " + ex.getMessage(), ex);

      }



      catch (IOException ioe)

      {

           Log.e("MediaPlayer", "error: " + ioe.getMessage(), ioe);

      }

      //------------------ read the SERVER RESPONSE
      try {
            inStream = new DataInputStream ( conn.getInputStream() );
            String str;

            while (( str = inStream.readLine()) != null)
            {
                 Log.e("MediaPlayer","Server Response"+str);
            }

            inStream.close();
      }

      catch (IOException ioex){
           Log.e("MediaPlayer", "error: " + ioex.getMessage(), ioex);
      }

    }
    }

我的php服务器端代码如下

<?php

 $target_path = "uploads/";

 $target_path = $target_path . basename( $_FILES['uploadedfile']['name']);

 if(move_uploaded_file($_FILES['uploadedfile']['tmp_name'], $target_path)) {
echo "The file ". basename( $_FILES['uploadedfile']['name']).
    " has been uploaded";
 } 

 else{
      echo "There was an error uploading the file, please try again!";
   }
   ?>

---

服务器似乎没有响应客户端。尝试通过Android应用程序使用ftp连接进行上传，如果可以，请检查Apache在接受连接和可写目录方面的配置。当我遇到类似的问题时，结果是我的目录没有写入权限

---

错误是来自Java还是来自Apache？

请按以下方式更改代码以获得正确的转义序列：

替换

String lineEnd = "rn";

与

---

我正在连接，但ftp客户端无法连接到服务器。我不知道如何运行服务器。我是否需要运行apache并在浏览器中打开服务器url？还是我需要做点别的？错误消息在eclipse日志中。如果您试图通过FTP传输数据，那么Apache与此无关，您需要运行FTP服务器。在这种情况下，您不需要PHP文件来“捕获”正在上载的内容。另一方面，如果您试图使用PHP上传，那么应该使用“_POST”将文件名从Java传递到PHP。你给我们的代码是正确的，但是它似乎不知道要上传的文件名。希望这能有所帮助。但是有什么问题呢？它不知道要上传的文件名。当我从上面提供的android代码上传文件时，我收到了一条消息“文件已写入”。但在服务器端，我收到错误消息“上传文件时出错，请重试！”。这可能意味着您的目录不可写。您应该对目录进行chmod以允许WritingKey。。。非常感谢您的回复。让我用另一个目录再试一次。更改的标签-这似乎与PHP无关-您应该能够使用传统浏览器通过一个简单的测试页面来检查这一点，但我认为这是一个PHP问题，因为服务器代码是PHP。我试过这段代码，从中可以看出POST请求中没有发送任何文件。我使用var_dump（$_文件）进行了测试；这里有一个有用的例子。试试看。“这会对你有帮助的。”傻编码器，你做了什么？

String lineEnd = "rn";

String lineEnd = "\r\n";