I am getting error when i am trying to decompressing the files coming from server,but i am getting error of invalid bit length in while loop.Is there any problem with code or encoding.
byte[] buffer = new byte[1024];
FileInputStream fileInput = null;
FileOutputStream fileOutputStream = null;
GZIPInputStream gzipInputStream = null;
System.out.println(source_compressed_filepath);
System.out.println(destinaton_decompressed_filepath);
try {
fileInput = new FileInputStream(source_compressed_filepath);
gzipInputStream = new GZIPInputStream(fileInput);
fileOutputStream = new FileOutputStream(destinaton_decompressed_filepath);
int len;
while ((len = gzipInputStream.read(buffer)) >=0) {
fileOutputStream.write(buffer, 0, len);
}
System.out.println("The file" + source_compressed_filepath + " was DeCompressed successfully!"
+ destinaton_decompressed_filepath);
}catch (IOException ex) {
System.out.println(" error in file decompression " + source_compressed_filepath);
} finally {
// close resources
try {
fileOutputStream.close();
gzipInputStream.close();
} catch (IOException e) {
}
}
Related
I have a java application which uses spring rest to upload a jar file.But the uploaded file is corrupted and I am not able to access the jar file from the server.Please help.
fileloc = fileloc.replace("$", "/");
String filename = uploadedFileRef.getOriginalFilename();
String path = fileloc + filename;
byte[] buffer = new byte[1000];
File outputFile = new File(path);
FileInputStream reader = null;
FileOutputStream writer = null;
int totalBytes = 0;
try {
outputFile.createNewFile();
reader = (FileInputStream) uploadedFileRef.getInputStream();
writer = new FileOutputStream(outputFile);
int bytesRead = 0;
while ((bytesRead = reader.read(buffer)) != -1) {
writer.write(buffer);
totalBytes += bytesRead;
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
reader.close();
writer.close();
} catch (IOException e) {
e.printStackTrace();
}
}
You call
writer.write(buffer);
so you write always the buffer size. Imagine the last read reads 10 bytes only but you will write 1000 bytes anyway.
Use
write(buffer, 0, bytesRead );
Or just check the question
I have a file that has been compressed (zip) by a .net application using system.io.compression.gzipstream library.
I tried to decompress (unzip) it using java.util.zip.GZIPInputStream in java.
it threw:
java.io.EOFException
at java.util.zip.GZIPInputStream.readUByte(GZIPInputStream.java:246)
at java.util.zip.GZIPInputStream.readUShort(GZIPInputStream.java:237)
at java.util.zip.GZIPInputStream.readUInt(GZIPInputStream.java:229)
at java.util.zip.GZIPInputStream.readTrailer(GZIPInputStream.java:197)
at java.util.zip.GZIPInputStream.read(GZIPInputStream.java:92)
at java.io.FilterInputStream.read(FilterInputStream.java:90)
at juwdemoproj.FileWriterTest.gunzipIt(FileWriterTest.java:353)
at juwdemoproj.FileWriterTest.main(FileWriterTest.java:51)
My sample code:
public static void gunzipIt() {
byte[] buffer = new byte[1024];
String zipFilePath = "C:\\Juw\\JR\\file\\output\\020030214112016.zip";
String destDirectory = "C:\\Juw\\JR\\file\\output\\targetUnzip";
try {
GZIPInputStream gzis =
new GZIPInputStream(new FileInputStream(zipFilePath));
FileOutputStream out = new FileOutputStream(destDirectory);
int len;
while ((len = gzis.read(buffer)) > 0) {
out.write(buffer, 0, len);
}
gzis.close();
out.close();
System.out.println("Done");
} catch (IOException ex) {
ex.printStackTrace();
}
}
Question:
- Is it possible to unzip the file in java, when the file was compressed by a .net application?
- Any zip library that can achieve the above requirement?
Thanks
I use this code and it solve my issue.
public void gunzipIt(){
byte[] buffer = new byte[1024];
boolean isValid = true;
try{
GZIPInputStream gzis =
new GZIPInputStream(new FileInputStream(INPUT_GZIP_FILE));
FileOutputStream out =
new FileOutputStream(OUTPUT_FILE);
while (isValid) {
int len;
try{
len = gzis.read(buffer);
}catch(Exception ex){
len = 0;
isValid = false;
}
if (len > 0) {
out.write(buffer, 0, len);
}else{
isValid = false;
}
}
gzis.close();
out.close();
System.out.println("Done");
}catch(IOException ex){
ex.printStackTrace();
}
}
at the end of the file there is a empty string, so it throwing error. i get this code from my colleague and it works.
I have been fixing my server many times and now i'm stuck ones again.
So I have been trying to send pictures through my clientGUI to a server, So the person can see the file im sending. I dont really know how to explain this. but however. Im just trying to send a file so the other client can accept it and save it. BUT as fast as I press the button picture (It should automatic send a picture to a desktop that I have placed) it does work,
Connection is accepted; localhost/127.0.0.1 - 1500
Sending C:/Users/Barry/Desktop/Ceo/Cao6.jpg(15306 bytes)
Server has closed the connection
but i'm not getting anything in the desktop and in my ServerGUI, I can see that it says :
Exception reading Streams: java.io.StreamCorruptedException: invalid type code: FF
which I have no idea how to fix it and I need some ideas how I can fix this.
Sendpic.java
public void SendPic() throws IOException {
JFileChooser chooser = new JFileChooser();
String FILESEND = "C:/Users/Barry/Desktop/Ceo/Cao6.jpg";
FileInputStream fis = null;
BufferedInputStream bis = null;
OutputStream os = null;
try {
// send file
File myFile = new File (FILESEND);
byte [] mybytearray = new byte [(int)myFile.length()];
fis = new FileInputStream(myFile);
bis = new BufferedInputStream(fis);
bis.read(mybytearray,0,mybytearray.length);
os = socket.getOutputStream();
System.out.println("Sending " + FILESEND + "(" + mybytearray.length + " bytes)");
os.write(mybytearray,0,mybytearray.length);
} catch (IOException e) {
e.printStackTrace();
}
}
getPic.Java
final static int FILE_SIZE = 6022386;
public void getPic() throws IOException {
JFileChooser chooser = new JFileChooser();
String FILETORECEIVED = "C:/Users/Barry/Desktop/";
int bytesRead;
int current = 0;
FileOutputStream fos = null;
BufferedOutputStream bos = null;
try {
byte [] mybytearray = new byte [FILE_SIZE];
InputStream is = socket.getInputStream();
fos = new FileOutputStream(FILETORECEIVED);
bos = new BufferedOutputStream(fos);
bytesRead = is.read(mybytearray,0,mybytearray.length);
current = bytesRead;
do {
bytesRead =
is.read(mybytearray, current, (mybytearray.length-current));
if(bytesRead >= 0) current += bytesRead;
} while(bytesRead > -1);
bos.write(mybytearray, 0 , current);
bos.flush();
System.out.println("File " + FILE_SIZE
+ " downloaded (" + current + " bytes read)");
}
finally {
if (fos != null) fos.close();
if (bos != null) bos.close();
}
}
ActionPerformed`
public void actionPerformed(ActionEvent e) {
Object button = e.getSource();
if (button == btnPicture) {
try {
controller.SendPic();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
return;
}`
i need to open a file of 12 Megabytes, but actually i'm doing it creating a buffer of 12834566-byte, because the size of the file is 12MB and i am developing this app for Android mobile systems.
Then, i supose i have to read with blocks of 1024 Kbytes instead of one block of 12 Mbytes, with a for, but i don't know how to do it, i need a little help with it.
This is my actual code:
File f = new File(getCacheDir()+"/berlin.mp3");
if (!f.exists()) try {
InputStream is = getAssets().open("berlin.mp3");
int size = is.available();
byte[] buffer = new byte[size];
is.read(buffer);
is.close();
FileOutputStream fos = new FileOutputStream(f);
fos.write(buffer);
fos.close();
} catch (Exception e) { throw new RuntimeException(e); }
Please, can someone tell me what i have to changue in this code to read blocks of 1024 Kbytes instead of one block of 12 Mbytes?
THanks!
Try copying 1 KB at a time.
File f = new File(getCacheDir()+"/berlin.mp3");
if (!f.exists()) try {
byte[] buffer = new byte[1024];
InputStream is = getAssets().open("berlin.mp3");
FileOutputStream fos = new FileOutputStream(f);
int len;
while((len = is.read(buffer)) > 0)
fos.write(buffer, 0, len);
} catch (Exception e) {
throw new RuntimeException(e);
} finally {
IOUtils.close(is); // utility to close the stream properly.
IOUtils.close(fos);
}
Does Android support symbolic or hand links like UNIX? If it does, this would be faster/more efficient.
File f = new File(getCacheDir()+"/berlin.mp3");
InputStream is = null;
FileOutputStream fos = null;
if (!f.exists()) try {
is = getAssets().open("berlin.mp3");
fos = new FileOutputStream(f);
byte[] buffer = new byte[1024];
while (is.read(buffer) > 0) {
fos.write(buffer);
}
} catch (Exception e) {
throw new RuntimeException(e);
} finally {
// proper stream closing
if (is != null) {
try { is.close(); } catch (Exception ignored) {} finally {
if (fos != null) {
try { fos.close(); } catch (Exception ignored2) {}
}
}
}
}
import org.apache.commons.fileupload.util.Streams;
InputStream in = getAssets().open("berlin.mp3");
OutputStream out = new FileOutputStream(f);
Streams.copy(in, out, true);
I am building an Android Application and I need to download a file from a url, which is 33 MB large.
Here the download task:
try {
int MAX_BUFFER_SIZE = 4096;
URL mUrl = new URL(params[0]);
HttpURLConnection connection = (HttpURLConnection) mUrl.openConnection();
connection.setRequestMethod("GET");
long length = connection.getContentLength(), downloaded = 0;
int read;
byte [] buffer = new byte[(((int)length) > MAX_BUFFER_SIZE) ? MAX_BUFFER_SIZE : (int)length];
String filename = getFilename(mUrl);
File file = new File (SDCARD_ROOT);
if (!file.exists() || !file.isDirectory()){
file.mkdir();
}
this.filename = filename;
file = new File (SDCARD_ROOT + this.filename);
FileOutputStream fos = new FileOutputStream (file);
//Start downloading
InputStream stream = connection.getInputStream();
while ((read=stream.read(buffer)) > -1){
fos.write(buffer, 0, read);
downloaded += read;
publishProgress((int) ((float) downloaded/length * 100));
}
fos.close();
return 1;
} catch (Exception e){
Log.e("REV-PARTS", "Revolver parts error in DownloadTask: " + e.getMessage());
return 2;
}
It works right with small files (1-15 MB), but it will return a "unexpected end of stream" exception with large files.
Setting a chunk size seemed to work for me.
connection.setChunkedStreamingMode(1048576);
For large files you need to set the connection time out manually by using the following code.
I have set the time out to 3 minutes
connection.setConnectTimeout(180000);
connection.setReadTimeout(180000);
While you catch the exception, I try the method downContinue(). I can show my code:
private void downloadApk() {
thread1 = new Thread() {
public void run() {
File oFile = null;
try {
URL url = new URL(PQGLApplication.resrootURL + "apk/PQGLMap.apk");
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
ReadableByteChannel channel =
Channels.newChannel(urlConnection.getInputStream());
oFile =
new File(Environment.getExternalStorageDirectory().getAbsolutePath()
+ "/" + "hy_ht_new/" + "test2" + ".apk");
oFile.setWritable(true);
oFile.setReadable(true);
if (oFile.exists()) {
oFile.delete();
}
FileOutputStream fos = new FileOutputStream(oFile);
fileSize = urlConnection.getContentLength();
ByteBuffer buffer = ByteBuffer.allocate(1024);
int noOfBytes = 0;
byte[] data = null;
sendApkMessage(0, 0);
while ((noOfBytes = channel.read(buffer)) > 0) {
data = new byte[noOfBytes];
System.arraycopy(buffer.array(), 0, data, 0, noOfBytes);
buffer.clear();
fos.write(data, 0, noOfBytes);
downLoadFileSize += noOfBytes;
sendApkMessage(1, downLoadFileSize);
}
fos.flush();
fos.close();
channel.close();
sendApkMessage(2, oFile.getAbsolutePath());
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
downContinue();
}
};
};
thread1.start();
}
private void downContinue() {
continueTime++;
try {
if (continueTime == 3) {
continueTime = 0;
sendApkMessage(4, 0);
Log.e("what is the continuetime", "continueTime" + continueTime);
} else {
URL url = new URL(PQGLApplication.resrootURL + "apk/PQGLMap.apk");
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
File oFile =
new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/"
+ "hy_ht_new/" + "test2" + ".apk");
RandomAccessFile oSavedFile = new RandomAccessFile(oFile, "rw");
FileOutputStream fos = new FileOutputStream(oFile);
ReadableByteChannel channel = Channels.newChannel(urlConnection.getInputStream());
// oSavedFile.seek(nPos);
ByteBuffer buffer = ByteBuffer.allocate(1024);
byte[] data = null;
int temp = 0;
sendApkMessage(3, oFile.getAbsolutePath());
while ((temp = channel.read(buffer)) > 0) {
data = new byte[temp];
System.arraycopy(buffer.array(), 0, data, 0, temp);
buffer.clear();
fos.write(data, 0, temp);
}
fos.flush();
fos.close();
oSavedFile.close();
sendApkMessage(2, oFile.getAbsolutePath());
continueTime = 0;
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
Log.e("what is the exception", e.toString() + continueTime);
downContinue();
}
}
This downContinue method is used to solve this problem. At least, the file is downloaded successfully!