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android - 将音频文件从 Android 客户端上传到服务器时找不到文件错误

转载 作者：行者123 更新时间：2023-11-29 22:12:50 25 4
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我尝试将音频文件从 Android 客户端上传到服务器，但在服务器控制台上出现以下错误:java.io.FileNotFoundException:D:\temp\sdcard\recording20605.3gpp(系统找不到指定的路径)(“D:\temp”是我试图在我的服务器上存储来自客户端的文件的地方，即在我的电脑 D 驱动器中的临时文件夹中)。

请帮忙

这是客户端和服务器的代码

服务器代码

    // Import required java libraries
    import java.io.File;
    import java.util.Iterator;
    import java.util.List;

    import javax.servlet.ServletException;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;

    import org.apache.tomcat.util.http.fileupload.FileItem;
    import org.apache.tomcat.util.http.fileupload.disk.DiskFileItemFactory;
    import org.apache.tomcat.util.http.fileupload.servlet.ServletFileUpload;

    public class UploadServlet extends HttpServlet {

       private boolean isMultipart;
       private String filePath;
       private int maxFileSize = 9000 * 1024;
       private int maxMemSize = 6 * 1024;
       private File file ;

       public void init( ){
          // Get the file location where it would be stored.
          filePath = 
                 getServletContext().getInitParameter("file-upload"); 
       }
       public void doPost(HttpServletRequest request, 
                   HttpServletResponse response)
                  throws ServletException, java.io.IOException {
          // Check that we have a file upload request
          isMultipart = ServletFileUpload.isMultipartContent(request);
          response.setContentType("text/html");
          java.io.PrintWriter out = response.getWriter( );
          if( !isMultipart ){
             out.println("<html>");
             out.println("<head>");
             out.println("<title>Servlet upload</title>");  
             out.println("</head>");
             out.println("<body>");
             out.println("<p>No file uploaded</p>"); 
             out.println("</body>");
             out.println("</html>");
             return;
          }
          DiskFileItemFactory factory = new 

DiskFileItemFactory();
      // maximum size that will be stored in memory
      factory.setSizeThreshold(maxMemSize);
      // Location to save data that is larger than maxMemSize.
      factory.setRepository(new File("D:\\temp"));

      // Create a new file upload handler
      ServletFileUpload upload = new ServletFileUpload(factory);
      // maximum file size to be uploaded.
      upload.setSizeMax( maxFileSize );

      try{ 
      // Parse the request to get file items.
      List fileItems = upload.parseRequest(request);

      // Process the uploaded file items
      Iterator i = fileItems.iterator();

      out.println("<html>");
      out.println("<head>");
      out.println("<title>Servlet upload</title>");  
      out.println("</head>");
      out.println("<body>");
      while ( i.hasNext () ) 
      {
         FileItem fi = (FileItem)i.next();
         if ( !fi.isFormField () )  
         {
            // Get the uploaded file parameters
            String fieldName = fi.getFieldName();
            String fileName = fi.getName();
            String contentType = fi.getContentType();
            boolean isInMemory = fi.isInMemory();
            long sizeInBytes = fi.getSize();
            // Write the file
            if( fileName.lastIndexOf("\\") >= 0 ){
               file = new File( filePath + 
               fileName.substring( fileName.lastIndexOf("\\"))) ;
            }else{
               file = new File( filePath + 
               fileName.substring(fileName.lastIndexOf("\\")+1)) ;
            }
            fi.write( file ) ;
            out.println("Uploaded Filename: " + fileName + "<br>");
         }
      }
      out.println("</body>");
      out.println("</html>");
   }catch(Exception ex) {
       System.out.println(ex);
   }
   }
   public void doGet(HttpServletRequest request, 
                       HttpServletResponse response)
        throws ServletException, java.io.IOException {

        throw new ServletException("GET method used with " +
                getClass( ).getName( )+": POST method required.");
   } 
}
------------------
CLIENT CODE
-----------------
package com.client;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.util.Log;

    public class SampleclientActivity extends Activity {     
        private static final int SELECT_AUDIO = 2;
        String selectedPath = "";

        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.main);

            openGalleryAudio();
        }

        public void openGalleryAudio(){

        Intent intent = new Intent();
            intent.setType("audio/*");
            intent.setAction(Intent.ACTION_GET_CONTENT);
            startActivityForResult(Intent.createChooser(intent,"Select Audio "), SELECT_AUDIO);
       }

        public void onActivityResult(int requestCode, int resultCode, Intent data) {

            if (resultCode == RESULT_OK) {

                if (requestCode == SELECT_AUDIO)
                {
                    System.out.println("SELECT_AUDIO");
                    Uri selectedImageUri = data.getData();
                    selectedPath = getPath(selectedImageUri);
                    System.out.println("SELECT_AUDIO Path : " + selectedPath);
                    doFileUpload();
                }

            }
        }

        public String getPath(Uri uri) {
            String[] projection = { MediaStore.Images.Media.DATA };
            Cursor cursor = managedQuery(uri, projection, null, null, null);
            int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
            cursor.moveToFirst();
            return cursor.getString(column_index);
        } 

        private void doFileUpload(){
            HttpURLConnection conn = null;
            DataOutputStream dos = null;
            DataInputStream inStream = null;
            String lineEnd = "\r\n";
            String twoHyphens = "--";
            String boundary =  "*****";
            int bytesRead, bytesAvailable, bufferSize;
            byte[] buffer;
            int maxBufferSize = 4*1024*1024;
            String responseFromServer = "";
            String urlString = "http://123.236.177.244:8085/myproject1/UploadServlet";
            try
            {
             //------------------ CLIENT REQUEST
            FileInputStream fileInputStream = new FileInputStream(new File(selectedPath) );
             // 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=\"" + selectedPath + "\"" + lineEnd);
             dos.writeBytes(lineEnd);
             // 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("Debug","File is written");
             fileInputStream.close();
             dos.flush();
             dos.close();
            }
            catch (MalformedURLException ex)
            {
                 Log.e("Debug", "error: " + ex.getMessage(), ex);
            }
            catch (IOException ioe)
            {
                 Log.e("Debug", "error: " + ioe.getMessage(), ioe);
            }
            //------------------ read the SERVER RESPONSE
            try {
                  inStream = new DataInputStream ( conn.getInputStream() );
                  String str;

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

            }
            catch (IOException ioex){
                 Log.e("Debug", "error: " + ioex.getMessage(), ioex);
            }
          }
}
----------------------
AndroidManifest.xml
---------------------
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.client"
      android:versionCode="1"
      android:versionName="1.0">
    <uses-sdk android:minSdkVersion="7" />
    <uses-permission android:name="android.permission.READ_OWNER_DATA"></uses-permission>


    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".SampleclientActivity"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

    </application>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.INTERNET"></uses-permission>

</manifest>

最佳答案

您的文件名包含一个额外的“\sdcard”，它试图将文件保存在“temp”目录内的“sdcard”目录中。当然 SDCARD 是在服务器上找不到的目录，因此它抛出异常。要么在运行时更改文件名并从中删除“sdcard”，要么在“temp”中创建名为“sdcard”的目录。

关于android - 将音频文件从 Android 客户端上传到服务器时找不到文件错误，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/9228088/

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