用Java程序實現解壓縮文件

package com.huawei.globe;

import java.util.zip.*;
import java.io.*;

public class Compress {

 public Compress() {

 }

 // 壓縮目錄下的文件
 public void compress(String zipFileName, String inputFile) throws Exception {
  compress(zipFileName, new File(inputFile));
 }

 // 壓縮文件
 public void compress(String zipFileName, File inputFile) throws Exception {
  ZipOutputStream out = new ZipOutputStream(new FileOutputStream(
    zipFileName));
  compress(out, inputFile, "");
  System.out.println("壓縮成功!");
  out.close();
 }

 public void compress(ZipOutputStream out, File f, String base)
   throws Exception {
  System.out.println("正在壓縮  " + f.getName());
  if (f.isDirectory()) {
   File[] fl = f.listFiles();
   out.putNextEntry(new ZipEntry(base + "/"));
   base = base.length() == 0 ? "" : base + "/";
   for (int i = 0; i < fl.length; i++) {
    compress(out, fl[i], base + fl[i].getName());
   }
  } else {
   out.putNextEntry(new ZipEntry(base));
   FileInputStream in = new FileInputStream(f);
   int b;
   while ((b = in.read()) != -1)
    out.write(b);
   in.close();
  }
 }

 // 解壓縮文件
 public void upCompress(String zipFileName, String outputDirectory)
   throws Exception {
  ZipInputStream in = new ZipInputStream(new FileInputStream(zipFileName));
  ZipEntry z;
  while ((z = in.getNextEntry()) != null) {
   System.out.println("正在解壓 " + z.getName());
   if (z.isDirectory()) {
    String name = z.getName();
    name = name.substring(0, name.length() - 1);
    File f = new File(outputDirectory + File.separator + name);
    f.mkdir();
    System.out.println("創建目錄 " + outputDirectory + File.separator
      + name);
   } else {
    File f = new File(outputDirectory + File.separator
      + z.getName());
    f.createNewFile();
    FileOutputStream out = new FileOutputStream(f);
    int b;
    while ((b = in.read()) != -1)
     out.write(b);
    out.close();
   }
  }
  in.close();
 }

 public static void main(String[] args) {
  try {
   Compress t = new Compress();
   t.compress("D://new.zip", "D://WEB開發分類總結//zhengzebiaodashi");
   t.upCompress("d://ddd//quanleilei.jar", "d://ddd//");
  } catch (Exception e) {
   e.printStackTrace(System.out);
  }
 }
}