Unzip

unzip.java

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Enumeration;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

import javax.swing.JFileChooser;
import javax.swing.filechooser.FileNameExtensionFilter;

public class Unzip {

	/**
	 * @param args
	 * @throws FileNotFoundException
	 */
	public static void main(String[] args) {

		JFileChooser chooser = new JFileChooser();
		chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
		int returnVal = chooser.showOpenDialog(null);

		if (returnVal != JFileChooser.APPROVE_OPTION) {
			return;
		}

		String path = chooser.getSelectedFile().getAbsolutePath();

		try {
			File f = new File(path);
			File[] contents = f.listFiles();

			for (int i = 0; i < contents.length; i++) {
				if (contents[i].getName().contains(".zip")) {
					ZipFile zipFile = new ZipFile(contents[i]);
					Enumeration<? extends ZipEntry> enumeration = zipFile.entries();
					
					String fileName = contents[i].getName();
					int period = fileName.indexOf('.');
					fileName = fileName.substring(0, period);
					
					File newfolder = new File(path + "\\" +fileName);
					Boolean result = newfolder.mkdir();
					
					while (enumeration.hasMoreElements()) 
					{
						ZipEntry zipEntry = (ZipEntry) enumeration.nextElement();
						//System.out.println("Unzipping: " + zipEntry.getName());
						BufferedInputStream bis = new BufferedInputStream(zipFile.getInputStream(zipEntry));
						int size;
						byte[] buffer = new byte[2048];
						
						BufferedOutputStream bos = new BufferedOutputStream( new FileOutputStream(path +  "\\" + newfolder.getName() +  "\\" + zipEntry.getName()), buffer.length);
						
						while ((size = bis.read(buffer, 0, buffer.length)) != -1) {
							bos.write(buffer, 0, size);
						}
						bos.flush();
						bos.close();
						bis.close();
					}
					contents[i].delete();
				}
			}

		} catch (FileNotFoundException ex) {

		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

}