Problem extracting .jar and .zip with directory structure

[bobrivers2003]

I have created a class that extracts all files within a built EAR application, within this EAR there would be additional archives that exist that also would need extracting.

I am having trouble extracting jars and zip files that have files in multiple level of directories e.g. dir/dir1/dir2/fileName. For these it returns java.io.FileNotFoundException "path and file name" (The system cannot find the path specified).

I discovered that this is because the directory is not being created before the file is extracted. But I have the code to do this and it working for wars and ears of all directory level types. Just zips and jars being a pain.

If anyone can shed some light will be may savior as a week of head banging is begining to hurt!!!

Any help would be greatly appreciated

...
public static final void copyInputStream(InputStream in, OutputStream out)
throws IOException {
byte[] buffer = new byte[1024];
int len;

while ((len = in.read(buffer)) >= 0)
out.write(buffer, 0, len);

in.close();
out.close();
}

...

// Extract zip directory
public void getZipFiles(String filename, String tempDir) {
Enumeration entries;
ZipFile zipFile;
checkDir(tempDir, true);//Check if dir exists, if it does it deletes contents, if not it create a new dir

try {
zipFile = new ZipFile(filename);
String destinationname = tempDir;
entries = zipFile.entries();


while (entries.hasMoreElements()) {
ZipEntry entry = (ZipEntry)entries.nextElement();


if (entry.isDirectory()) {
// Assume directories are stored parents first then children.


System.out.println("Extracting [directory]: " + entry.getName());

(new File(destinationname + entry.getName())).mkdir();

System.out.println(destinationname + entry.getName());
continue;

}


if (entry.getSize() > 0) {


System.out.println("Extracting [file]: " + entry.getName());

try {


copyInputStream(zipFile.getInputStream(entry), new BufferedOutputStream(
new FileOutputStream(destinationname + entry.getName())));

}catch (Exception i){


System.err.println(i);
}

String fileExtention =
entry.getName().substring(entry.getName().toString().lastIndexOf(".") + 1);
String fileNameNoExt =
entry.getName().substring(0,entry.getName().lastIndexOf("."));
String justDirName =
entry.getName().substring(fileNameNoExt.length());



// Add file extensions to hash table
// to create record of file types in archive
if (fileExt.containsKey(fileExtention)) {

Integer num = (Integer) fileExt.get(fileExtention);
int n = num.intValue() + 1;
fileExt.put(fileExtention, new Integer);

} else {


fileExt.put(fileExtention, new Integer(1));

}

if(fileExtention.equalsIgnoreCase("war")) {

String extractDir = tempDir + fileNameNoExt + "\\";
checkDir(extractDir, true);
System.out.println("Extracting [WAR]: " + entry.getName());
getZipFiles(tempDir, + entry.getName(), extractDir);
}

// if (fileExtention.equalsIgnoreCase("jar")) {
//
// String extractDir = tempDir + fileNameNoExt + "\\";
// System.out.println("EXTRACT DIR " + extractDir);
// System.out.println("TEMP DIR " + tempDir);
// System.out.println("fileNameNoExt " + fileNameNoExt);
//
// checkDir(extractDir, true);
//
// System.out.println("Extracting [JAR]: " + entry.getName());
// getZipFiles(tempDir + entry.getName(), extractDir);
//
// }


} else {

System.err.println("[ZERO BYTE OBJECT]: " + entry.getName());
zeroFileCount++;
}



}

zipFile.close();

} catch (IOException ioe) {
System.err.println("Unhandled exception:");
ioe.printStackTrace();
return;
}
}

...

public static void main(String[] args){

Unzip unzip = new Unzip();
unzip.getZipFiles("C:\\FILE.jar\\", "C:\\tempDIR\\");

}

..

 

[obadare]

Just a guess; might be easier to use recursion here. Create a method to extract files from a directory and use the method to process the the extracted files recursively

public void extract(String dir){
try{
File f = new File(dir);
if(f.exists() && f.canRead() && f.isDirectory()){
String[] files = f.list();
for(int j = 0;j<files.length;j++){
extract(files[j]);
}
}
}catch(Exception e){ e.printStackTrace(); }
}
You may have to substitute the code above with the zip extraction definition as you require.

 

[Diancecht]

I'd take a look at the zillion of examples you can find on the web:

http://www.idevelopment.info/data/Programming/java/zip/UnzipFile.java

Cheers,
Dian