UnzipUtil

public class UnzipUtil {
    private static final Logger logger = LoggerFactory.getLogger(CopyFileUtil.class);
    /**
     * Size of the buffer to read/write data
     */
    private static final int BUFFER_SIZE = 4096;

    /**
     * Extracts a zip file specified by the zipFilePath to a directory specified
     * by destDirectory (will be created if does not exists)
     *
     * @param zipFilePath
     * @param destDirectory
     * @throws IOException
     */
    public static void unzip(String zipFilePath, String destDirectory) {
        File destDir = new File(destDirectory);
        if (!destDir.exists()) {
            boolean mkdirs = destDir.mkdirs();
            if (!mkdirs) {
                logger.error("Call UnzipUtility.unzip,destDir mkdirs is false");
            }
        }
        try {
            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);
                    boolean mkdirs = dir.mkdirs();
                    if (!mkdirs) {
                        logger.error("Call UnzipUtility.unzip,dir mkdirs is false");
                    }
                }
                zipIn.closeEntry();
                entry = zipIn.getNextEntry();
            }
            zipIn.close();
        } catch (IOException e) {
            logger.warn("call UnzipUtility.unzip, occur exception. e.getMessage:[{}]", e.getMessage());
        }
    }

    /**
     * Extracts a zip entry (file entry)
     *
     * @param zipIn
     * @param filePath
     * @throws IOException
     */
    public static 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();
    }

}