Java中受密码保护的zip文件 问问题

Question

我已经使用Java创建了zip文件，如下所示import java.io.*;import java.util.zip.*;public class ZipCreateExample {  public static void main(String[] args) throws IOException {    System.out.print("Please enter file name to zip : ");    BufferedReader input = new BufferedReader        (new InputStreamReader(System.in));    String filesToZip = input.readLine();    File f = new File(filesToZip);    if(!f.exists()) {      System.out.println("File not found.");      System.exit(0);    }    System.out.print("Please enter zip file name : ");    String zipFileName = input.readLine();    if (!zipFileName.endsWith(".zip"))      zipFileName = zipFileName + ".zip";    byte[] buffer = new byte[18024];    try {      ZipOutputStream out = new ZipOutputStream          (new FileOutputStream(zipFileName));      out.setLevel(Deflater.DEFAULT_COMPRESSION);      FileInputStream in = new FileInputStream(filesToZip);      out.putNextEntry(new ZipEntry(filesToZip));      int len;      while ((len = in.read(buffer)) > 0) {        out.write(buffer, 0, len);      }      out.closeEntry();      in.close();      out.close();    } catch (IllegalArgumentException iae) {      iae.printStackTrace();      System.exit(0);    } catch (FileNotFoundException fnfe) {      fnfe.printStackTrace();      System.exit(0);    } catch (IOException ioe) {      ioe.printStackTrace();      System.exit(0);    }  }}现在，当我单击zip文件时，它应该提示我输入密码，然后解压缩该zip文件。请任何帮助，我应该怎么走？