Extract a zip file using Java

import java.io.BufferedOutputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.util.zip.ZipEntry;

import java.util.zip.ZipInputStream;

 

/**

 * This utility extracts files and directories of a standard zip file to

 * a destination directory.

 */

public class UnzipUtility {

    /**

     * Size of the buffer to read/write data

     */

    private static final int BUFFER_SIZE = 4096;

   

    public void unzip(String zipFilePath, String destdirectory)throwsIOException {

        File destDir = new File(destDirectory);

        if (!destDir.exists()) {

            destDir.mkdir();

        }

        ZipInputStream zipIn = new ZipInputStream(new FileInputStream(zipFilePath));

        ZipEntry entry = zipIn.getNextEntry();

        // iterates over entries in the zip file

        while (entry != null) {

            String filePath = destDirectory + File.separator + entry.getName();

            if (!entry.isDirectory()) {

                // if the entry is a file, extracts it

                extractFile(zipIn, filePath);

            } else {

                // if the entry is a directory, make the directory

                File dir = new File(filePath);

                dir.mkdir();

            }

            zipIn.closeEntry();

            entry = zipIn.getNextEntry();

        }

        zipIn.close();

    }

 


    private void extractFile(ZipInputStream zipIn, String filePath) throws IOException {

        BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(filePath));

        byte[] bytesIn = new byte[BUFFER_SIZE];

        int read = 0;

        while ((read = zipIn.read(bytesIn)) != -1) {

            bos.write(bytesIn, 0, read);

        }

        bos.close();

    }

}