My application has to download a zip and has to unzip it in the application folder. The problem is that the zip doesn't have files but folders and in each folder there are different files. I would to keep the same structure but I don't know how do it. I succeed if i do it with a zip of files but not with a zip of folders. There is somebody who knows how do it? Many thanks.
You will need to create the directories for each directory entry in the ZIP archive. Here is a method I wrote and use that will keep the directory structure:
/**
* Unzip a ZIP file, keeping the directory structure.
*
* @param zipFile
* A valid ZIP file.
* @param destinationDir
* The destination directory. It will be created if it doesn't exist.
* @return {@code true} if the ZIP file was successfully decompressed.
*/
public static boolean unzip(File zipFile, File destinationDir) {
ZipFile zip = null;
try {
destinationDir.mkdirs();
zip = new ZipFile(zipFile);
Enumeration<? extends ZipEntry> zipFileEntries = zip.entries();
while (zipFileEntries.hasMoreElements()) {
ZipEntry entry = zipFileEntries.nextElement();
String entryName = entry.getName();
File destFile = new File(destinationDir, entryName);
File destinationParent = destFile.getParentFile();
if (destinationParent != null && !destinationParent.exists()) {
destinationParent.mkdirs();
}
if (!entry.isDirectory()) {
BufferedInputStream is = new BufferedInputStream(zip.getInputStream(entry));
int currentByte;
byte data[] = new byte[DEFUALT_BUFFER];
FileOutputStream fos = new FileOutputStream(destFile);
BufferedOutputStream dest = new BufferedOutputStream(fos, DEFUALT_BUFFER);
while ((currentByte = is.read(data, 0, DEFUALT_BUFFER)) != EOF) {
dest.write(data, 0, currentByte);
}
dest.flush();
dest.close();
is.close();
}
}
} catch (Exception e) {
return false;
} finally {
if (zip != null) {
try {
zip.close();
} catch (IOException ignored) {
}
}
}
return true;
}