Extracting Zip File Using Java

Extract a zip file to a directory:

import java.io.*;
import java.util.zip.*;

public class Unzip {
public static void unzipTo(String zipName, String dirName) throws Exception {
  final int BUFFER = 2048;
  File dir = new File(dirName);
  if (!dir.exists())
    dir.mkdir();

  if (!dirName.endsWith("\\") && !dirName.endsWith("/")) {
    dirName += "/";
  }
  BufferedOutputStream dest = null;
  FileInputStream fis = new FileInputStream(zipName);
  CheckedInputStream checksum = new CheckedInputStream(fis, new Adler32());
  ZipInputStream zis = new ZipInputStream(new BufferedInputStream(
      checksum));

  ZipEntry entry;
  while ((entry = zis.getNextEntry()) != null) {
    System.out.println("Extracting: " + entry + " to " + dirName
        + entry.getName());
    int count;
    byte data[] = new byte[BUFFER];
    // write the files to the disk
    FileOutputStream fos = new FileOutputStream(dirName
        + entry.getName());
    dest = new BufferedOutputStream(fos, BUFFER);
    while ((count = zis.read(data, 0, BUFFER)) != -1) {
      dest.write(data, 0, count);
    }
    dest.flush();
    dest.close();
  }
  zis.close();
  System.out.println("Checksum: " + checksum.getChecksum().getValue());
}

public static final void main(String[] args) {
  try {
    String targetDir = "D:\\APP\\workspace\\chunkcode\\tmp";
    String zipFile = "D:/APP/workspace/chunkcode/test.zip";
    unzipTo(zipFile, targetDir);
  } catch (Exception e) {
    e.printStackTrace();
  }
}
}

The code is based from this article.