readInnerZipFile.java

readInnerZipFile.java

public static boolean readInnerZipFile(String oriZipFile,String 
                                innerZipFileEntryName, String outZipFileEntryName) {
  ZipFile innerZipFile = null;
  try {
    innerZipFile = new ZipFile(oriZipFile);
    Enumeration entries = innerZipFile.entries();
    ZipEntry entryIn = null;
    while (entries.hasMoreElements()) {
      ZipEntry entry = entries.nextElement();
      // System.out.println(entry);
      if (entry.getName().compareToIgnoreCase(innerZipFileEntryName) == 0) {
        entryIn = entry;
        break;
      }
    }

    if (entryIn != null) {
      InputStream In = innerZipFile.getInputStream(entryIn);
      OutputStream ow = new FileOutputStream(outZipFileEntryName,true);
      byte[] b = new byte[256];
      int len = In.read(b);
      while (len > 0) {
        ow.write(b, 0, len);
        len = In.read(b);
      }
      ow.flush();
      ow.close();
      In.close();
      return true;
    } else {
      return false;
    }
  } catch (IOException e) {
    e.printStackTrace();
    return false;
  }
}