Java 解壓檔案

 

public void testReadZip() throws Exception {
  // InputStream is=new BufferedInputStream(new FileInputStream());
  String baseDir = "C://Documents and Settings//ws//案頭//建立檔案夾";
  ZipFile zfile = new ZipFile("C://Documents and Settings//ws//案頭//建立檔案夾//dd.zip");
  System.out.println(zfile.getName());
  Enumeration zList = zfile.entries();
  ZipEntry ze = null;
  byte[] buf = new byte[1024];
  while (zList.hasMoreElements()) {
   // 從ZipFile中得到一個ZipEntry
   ze = (ZipEntry) zList.nextElement();
   if (ze.isDirectory()) {
    System.out.println("Dir: " + ze.getName() + " skipped..");
    continue;
   }
   System.out.println("Extracting: " + ze.getName() + "/t"
     + ze.getSize() + "/t" + ze.getCompressedSize());
   // 以ZipEntry為參數得到一個InputStream，並寫到OutputStream中
   OutputStream os = new BufferedOutputStream(new FileOutputStream(
     getRealFileName(baseDir, ze.getName())));
   InputStream is = new BufferedInputStream(zfile.getInputStream(ze));
   int readLen = 0;
   while ((readLen = is.read(buf, 0, 1024)) != -1) {
    os.write(buf, 0, readLen);
   }
   is.close();
   os.close();
   System.out.println("Extracted: " + ze.getName());
  }
  zfile.close();
}

private File getRealFileName(String baseDir, String absFileName) {//指定根目錄// 相對路徑名——ZipEntry中的name
  String[] dirs = absFileName.split("/");
  // System.out.println(dirs.length);
  File ret = new File(baseDir);
  if (dirs.length > 1) {
   for (int i = 0; i < dirs.length - 1; i++) {
    ret = new File(ret, dirs[i]);
   }
  }
  if (!ret.exists()) {
   ret.mkdirs();
  }
  ret = new File(ret, dirs[dirs.length - 1]);
  return ret;
}