我有一台服务器上传文件，服务器信息是
<form action="FileUpload" method="post" enctype="multipart/form-data">
Select File <input type="file" name="file1">
<p>
Select Filename <input type="text" size="20" name="filename">
<p>
<input type=submit value="Upload">
</form>
我使用以下代码上传文件
private boolean doFileUpload ( ) {
boolean success = false ;
HttpURLConnection conn = null ;
DataOutputStream dos = null ;
DataInputStream inStream = null ;
String exsistingFileName = filePath ;
String lineEnd = "\r\n" ;
String twoHyphens = "--" ;
String boundary = "*****" ;
int bytesRead , bytesAvailable , bufferSize ;
byte [ ] buffer ;
int maxBufferSize = 1 * 1024 * 1024 ;
String responseFromServer = "" ;
String urlString = "http://paperify.net/tripmark/FileUpload" ;
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 ( "action" , "FileUpload" ) ;
conn.setRequestProperty ( "file" , "myfile" ) ;
conn.setRequestProperty ( "value" , "Upload" ) ;
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 ) ;
BufferedReader in = new BufferedReader ( new InputStreamReader ( conn.getInputStream ( ) ) ) ;
String inputLine ;
while ( ( inputLine = in.readLine ( ) ) != null )
Log.e ( "Res" , "" + inputLine ) ;
// close streams
Log.e ( "MediaPlayer" , "File is written" ) ;
success = true ;
fileInputStream.close ( ) ;
dos.flush ( ) ;
dos.close ( ) ;
} catch ( MalformedURLException ex ) {
Log.e ( "MediaPlayer" , "error: " + ex.getMessage ( ) , ex ) ;
success = false ;
}
catch ( IOException ioe ) {
Log.e ( "MediaPlayer" , "error: " + ioe.getMessage ( ) , ioe ) ;
success = false ;
}
// ------------------ 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 ) ;
}
return success ;
}
它没有上传文件，但在
下面提供了例外12-16 01:04:37.031: E/MediaPlayer(24133): Headers are written
12-16 01:04:40.410: E/MediaPlayer(24133): error: http://paperify.net/tripmark/FileUpload
12-16 01:04:40.410: E/MediaPlayer(24133): java.io.FileNotFoundException: http://paperify.net/tripmark/FileUpload
12-16 01:04:40.410: E/MediaPlayer(24133): at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:521)
12-16 01:04:40.410: E/MediaPlayer(24133): at com.paperify.tripmark.UploadPicture.doFileUpload(UploadPicture.java:141)
12-16 01:04:40.410: E/MediaPlayer(24133): at com.paperify.tripmark.UploadPicture.doInBackground(UploadPicture.java:39)
12-16 01:04:40.410: E/MediaPlayer(24133): at com.paperify.tripmark.UploadPicture.doInBackground(UploadPicture.java:1)
12-16 01:04:40.410: E/MediaPlayer(24133): at android.os.AsyncTask$2.call(AsyncTask.java:185)
12-16 01:04:40.410: E/MediaPlayer(24133): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:306)
12-16 01:04:40.410: E/MediaPlayer(24133): at java.util.concurrent.FutureTask.run(FutureTask.java:138)
12-16 01:04:40.410: E/MediaPlayer(24133): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088)
12-16 01:04:40.410: E/MediaPlayer(24133): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581)
12-16 01:04:40.410: E/MediaPlayer(24133): at java.lang.Thread.run(Thread.java:1019)
12-16 01:04:40.437: E/MediaPlayer(24133): error: http://paperify.net/tripmark/FileUpload
12-16 01:04:40.437: E/MediaPlayer(24133): java.io.FileNotFoundException: http://paperify.net/tripmark/FileUpload
12-16 01:04:40.437: E/MediaPlayer(24133): at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:521)
12-16 01:04:40.437: E/MediaPlayer(24133): at com.paperify.tripmark.UploadPicture.doFileUpload(UploadPicture.java:167)
12-16 01:04:40.437: E/MediaPlayer(24133): at com.paperify.tripmark.UploadPicture.doInBackground(UploadPicture.java:39)
12-16 01:04:40.437: E/MediaPlayer(24133): at com.paperify.tripmark.UploadPicture.doInBackground(UploadPicture.java:1)
12-16 01:04:40.437: E/MediaPlayer(24133): at android.os.AsyncTask$2.call(AsyncTask.java:185)
12-16 01:04:40.437: E/MediaPlayer(24133): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:306)
12-16 01:04:40.437: E/MediaPlayer(24133): at java.util.concurrent.FutureTask.run(FutureTask.java:138)
12-16 01:04:40.437: E/MediaPlayer(24133): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088)
12-16 01:04:40.437: E/MediaPlayer(24133): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581)
12-16 01:04:40.437: E/MediaPlayer(24133): at java.lang.Thread.run(Thread.java:1019)
com.paperify.tripmark.UploadPicture.doFileUpload(UploadPicture.java:141)的第1行是
BufferedReader in = new BufferedReader ( new InputStreamReader ( conn.getInputStream ( ) ) ) ;
我不知道我在做什么错。
答案 0 :(得分：1)
使用HTTP客户端。这是一个示例代码。
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.mime.MultipartEntity;
import org.apache.http.entity.mime.content.FileBody;
import org.apache.http.entity.mime.content.StringBody;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
...
public static void uploadFile() throws Exception {
HttpClient httpclient = new DefaultHttpClient();
try {
HttpPost httppost = new HttpPost("http://paperify.net/tripmark/FileUpload");
StringBody filename = new StringBody("filename.ext");
File f = new File("src"+File.separator + "filename.ext");
FileBody bin = new FileBody(f);
StringBody comment = new StringBody("A binary file of some kind");
MultipartEntity reqEntity = new MultipartEntity();
reqEntity.addPart("file1", bin);
reqEntity.addPart("filename", filename);
reqEntity.addPart("comment", comment);
httppost.setEntity(reqEntity);
System.out.println("executing request " + httppost.getRequestLine());
HttpResponse response = httpclient.execute(httppost);
HttpEntity resEntity = response.getEntity();
System.out.println("----------------------------------------");
System.out.println(response.getStatusLine());
if (resEntity != null) {
System.out.println("Response content length: " + resEntity.getContentLength());
InputStream is = resEntity.getContent();
if (is != null) {
Writer writer = new StringWriter();
char[] buffer = new char[1024];
try {
Reader reader = new BufferedReader(
new InputStreamReader(is, "UTF-8"));
int n;
while ((n = reader.read(buffer)) != -1) {
writer.write(buffer, 0, n);
}
} finally {
is.close();
}
System.out.println("Response content: "+writer.toString());
} else {
System.out.println("Response nothing: ");
}
}
EntityUtils.consume(resEntity);
} finally {
try { httpclient.getConnectionManager().shutdown(); } catch (Exception ignore) {}
}
}
}