// Unzip a .zip file
public void unzip(File inputFile)  throws IOException
{
     ZipFile zipFile = new ZipFile(inputFile);
     Enumeration oEnum = zipFile.entries();
     while( oEnum.hasMoreElements() )
     {
         ZipEntry zipEntry = (ZipEntry) oEnum.nextElement();
         // write each entry to the correct location where the .zip file is extracted
         storeEntry(zipFile, zipEntry);
     }
     zipFile.close();
}


/**
 * Write a zip entry's contents to a new file created with its name and
 * stored in the location of the entry as in the .zip file.
 * As there can very well be many entries, we have created a separate method
 * to save each entry and the unzip method just uses this method
 */
private void  storeEntry(ZipFile zipFile, ZipEntry zipEntry)
{
     File file = new File(zipEntry.getName());
     if( zipEntry.isDirectory() )
     {
         file .mkdirs();
     }
     else
     {
         InputStream inputStream = zipFile.getInputStream(zipEntry);
         write(inputStream, file);                
     }
     file.deleteOnExit();
}

/**
 * Read an input stream and write contents to a file
 */
public void write(InputStream inputStream, File fileToWrite)
{        
        BufferedInputStream buffInputStream = new BufferedInputStream( inputStream );
        file.deleteOnExit();
        File dir = new File( file.getParent() );
        dir.mkdirs();  
        dir.deleteOnExit();
        FileOutputStream fos = new FileOutputStream( file );
        BufferedOutputStream bos = new BufferedOutputStream( fos );

        // write bytes
        int byteData;
        while( ( byteData = buffInputStream.read() ) != EOF )
        {
             bos.write( (byte) byteData);
        }

        // close all the open streams
        bos.close();
        fos.close();
        buffInputStream.close();
        inputStream.close();

}

// Unzip a .zip file
public void unzip(File inputFile)  throws IOException
{
     ZipFile zipFile = new ZipFile(inputFile);
     Enumeration oEnum = zipFile.entries();
     while( oEnum.hasMoreElements() )
     {
         ZipEntry zipEntry = (ZipEntry) oEnum.nextElement();
         // write each entry to the correct location where the .zip file is extracted
         storeEntry(zipFile, zipEntry);
     }
     zipFile.close();
}


/**
 * Write a zip entry's contents to a new file created with its name and
 * stored in the location of the entry as in the .zip file.
 * As there can very well be many entries, we have created a separate method
 * to save each entry and the unzip method just uses this method
 */
private void  storeEntry(ZipFile zipFile, ZipEntry zipEntry)
{
     File file = new File(zipEntry.getName());
     if( zipEntry.isDirectory() )
     {
         file .mkdirs();
     }
     else
     {
         InputStream inputStream = zipFile.getInputStream(zipEntry);
         write(inputStream, file);                
     }
     file.deleteOnExit();
}

/**
 * Read an input stream and write contents to a file
 */
public void write(InputStream inputStream, File fileToWrite)
{        
        BufferedInputStream buffInputStream = new BufferedInputStream( inputStream );
        file.deleteOnExit();
        File dir = new File( file.getParent() );
        dir.mkdirs();  
        dir.deleteOnExit();
        FileOutputStream fos = new FileOutputStream( file );
        BufferedOutputStream bos = new BufferedOutputStream( fos );

        // write bytes
        int byteData;
        while( ( byteData = buffInputStream.read() ) != EOF )
        {
             bos.write( (byte) byteData);
        }

        // close all the open streams
        bos.close();
        fos.close();
        buffInputStream.close();
        inputStream.close();

}