Google Tag Manager

2018/09/30

aterai

Expand the zip file selected by JFileChooser

Code

JButton button1 = new JButton("unzip");
button1.addActionListener(e -> {
  String str = field.getText();
  Path path = Paths.get(str);
  if (str.isEmpty() || Files.notExists(path)) {
    return;
  }
  String name = Objects.toString(path.getFileName());
  int lastDotPos = name.lastIndexOf('.');
  if (lastDotPos > 0) {
    name = name.substring(0, lastDotPos);
  }
  Path destDir = path.resolveSibling(name);
  try {
    if (Files.exists(destDir)) {
      String m = String.format(
          "%s already exists.
Do you want to overwrite it?", destDir.toString()); int rv = JOptionPane.showConfirmDialog( button1.getRootPane(), m, "Unzip", JOptionPane.YES_NO_OPTION); if (rv != JOptionPane.YES_OPTION) { return; } } else { if (LOGGER.isLoggable(Level.INFO)) { LOGGER.info("mkdir0: " + destDir.toString()); } Files.createDirectories(destDir); } ZipUtil.unzip(path, destDir); } catch (IOException ex) { ex.printStackTrace(); } }); // ... public static void unzip(Path zipFilePath, Path destDir) throws IOException { try (ZipFile zipFile = new ZipFile(zipFilePath.toString())) { Enumeration e = zipFile.entries(); while (e.hasMoreElements()) { ZipEntry zipEntry = e.nextElement(); String name = zipEntry.getName(); Path path = destDir.resolve(name); if (name.endsWith("/")) { // if (Files.isDirectory(path)) { log("mkdir1: " + path.toString()); Files.createDirectories(path); } else { Path parent = path.getParent(); if (Files.notExists(parent)) { log("mkdir2: " + parent.toString()); Files.createDirectories(parent); } log("copy: " + path.toString()); Files.copy(zipFile.getInputStream(zipEntry), path, StandardCopyOption.REPLACE_EXISTING); } } } } //... public static void zip(Path srcDir, Path zip) throws IOException { try (Stream s = Files.walk(srcDir).filter(Files::isRegularFile)) { List files = s.collect(Collectors.toList()); try (ZipOutputStream zos = new ZipOutputStream(Files.newOutputStream(zip))) { for (Path f: files) { String relativePath = srcDir.relativize(f).toString(); ZipEntry ze = new ZipEntry(relativePath.replace('\\', '/')); zos.putNextEntry(ze); Files.copy(f, zos); } } } }

References