Java Utililty Methods Unzip File

JarFile jar = null;
try {
    if (!destDir.exists()) {
        destDir.mkdir();
    jar = new JarFile(jarFile);
    Enumeration<JarEntry> enumEntries = jar.entries();
    InputStream input = null;
...

final ZipFile zipFile = new ZipFile(sourceFile);
Enumeration<? extends ZipEntry> entries = zipFile.entries();
while (entries.hasMoreElements()) {
    final ZipEntry zipEntry = entries.nextElement();
    String name = zipEntry.getName();
    final File file = new File(rootDir, name);
    if (name.endsWith("/")) { 
        if (!file.exists() && !file.mkdirs()) {
...

try (ZipFile zfile = new ZipFile(sourceZipfile);) {
    Enumeration<? extends ZipEntry> entries = zfile.entries();
    while (entries.hasMoreElements()) {
        ZipEntry entry = entries.nextElement();
        File file = new File(directory, entry.getName());
        if (entry.isDirectory()) {
            file.mkdirs();
        } else {
...

dest.mkdirs();
BufferedOutputStream out = null;
BufferedInputStream is = null;
try {
    ZipEntry entry;
    ZipFile zip = new ZipFile(src);
    for (Enumeration<? extends ZipEntry> e = zip.entries(); e.hasMoreElements();) {
        entry = e.nextElement();
...

InputStream in = new FileInputStream(src);
ZipInputStream zi = new ZipInputStream(in);
try {
    String fn;
    ZipEntry ze;
    File f;
    OutputStream out;
    int l;
...

if (!srcZipFile.exists() || !tgtDir.exists()) {
    return false;
if (!tgtDir.isDirectory()) {
    return false;
try {
    ZipFile zipFile = new ZipFile(srcZipFile);
...

ZipInputStream zis = null;
final int BUFFER = 2048;
try {
    zis = new ZipInputStream(new FileInputStream(tarFile));
    ZipEntry zipEntry = zis.getNextEntry();
    while (zipEntry != null) {
        File destPath = new File(destinationDir, zipEntry.getName());
        File parent = destPath.getParentFile();
...

List<File> unzippedFiles = new ArrayList<>();
BufferedOutputStream dest = null;
FileInputStream fis = new FileInputStream(target);
ZipEntry entry = null;
try (ZipInputStream zis = new ZipInputStream(new BufferedInputStream(fis))) {
    while ((entry = zis.getNextEntry()) != null) {
        int count;
        byte data[] = new byte[BUFFER];
...

if (logger.isLoggable(Level.FINE)) {
    logger.fine("Unzipping file [" + targetZip.getAbsolutePath() + "] with size [" + targetZip.length()
            + "] to [" + dirToExtract.getAbsolutePath() + "]");
long totalSize = 0;
final int bufferSize = 4098;
byte data[] = new byte[bufferSize];
ZipFile zipFile = new ZipFile(targetZip);
...

try {
    String destinationDirName = zip.getName().substring(0, zip.getName().length() - ".zip".length());
    File destinationDir = new File(zip.getParentFile(), destinationDirName);
    unzipHelper(zip, destinationDir);
} catch (IOException e) {
    e.printStackTrace();