java 中壓縮與解壓__java

package com.common.util;

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

public class UnZip {

 public static int iCompressLevel; //壓縮比  取值範圍為0~9

 public static boolean bOverWrite; //是否覆蓋同名檔案 取值範圍為True和False

 private static ArrayList allFiles = new ArrayList();

 public static String sErrorMessage;

 public static ArrayList unZip(String zipPathFile, String DestPath) {
  ArrayList allFileName = new ArrayList();
  try {
   //先指定壓縮檔的位置和檔名，建立FileInputStream對象
   FileInputStream in = new FileInputStream(zipPathFile);
   //將fins傳入ZipInputStream中
   ZipInputStream zin = new ZipInputStream(in);
   ZipEntry ent = null;
   byte ch[] = new byte[256];
   while ((ent = zin.getNextEntry()) != null) {
    File zfile = new File(DestPath + ent.getName());
    File fpath = new File(zfile.getParentFile().getPath());
    if (ent.isDirectory()) {
     if (!zfile.exists())
      zfile.mkdirs();
     zin.closeEntry();
    } else {
     if (!fpath.exists())
      fpath.mkdirs();
     FileOutputStream fouts = new FileOutputStream(zfile);
     int i;
     allFileName.add(zfile.getAbsolutePath());
     while ((i = zin.read(ch)) != -1)
      fouts.write(ch, 0, i);
     zin.closeEntry();
     fouts.close();
    }
    //System.out.println("解壓檔案: " + ent.getName() + zipPathFile);
   }
   in.close();
   zin.close();
   sErrorMessage = "OK";
  } catch (Exception e) {
   System.err.println("Extract error:" + e.getMessage());
   sErrorMessage = e.getMessage();
  }
  allFiles.clear();
  System.out.println("完成");
  return allFileName;
 }
 
 public static void main(String[] args) {
  
  UnZip.unZip("c://order_20.rar", "c://un//");

 }
}