Исходный текст программы DemoUnzip.java

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// ==========================================
// DemoUnzip.java
// (C) Alexandr Frolov, 1998
// E-mail: frolov@glasnet.ru
// Web:    http://www.glasnet.ru/~frolov 
// ==========================================

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

public class DemoUnzip
{
  public static void main(String args[])
  {
    String szZipFilePath;
    String szExtractPath;
    int i;
    
    System.out.println(
      "Enter full path to Zip-file: ");
    szZipFilePath = new String(getKbdString());
      
    File f = new File(szZipFilePath);
    if(!f.exists())
    {
      System.out.println(
	"\nNot found: " + szZipFilePath);
      System.exit(0);
    }
      
    if(f.isDirectory())
    {
      System.out.println(
	"\nNot file: " + szZipFilePath);
      System.exit(0);
    }
    
    System.out.println(
      "Enter path to extract files: ");
    szExtractPath = new String(getKbdString());
    
    File f1 = new File(szExtractPath);
    if(!f1.exists())
    {
      System.out.println(
	"\nNot found: " + szExtractPath);
      System.exit(0);
    }
      
    if(!f1.isDirectory())
    {
      System.out.println(
	"\nNot directory: " + szExtractPath);
      System.exit(0);
    }
    
    ZipFile zf; 
    Vector zipEntries = new Vector();
       
    try
    {  
      zf = new ZipFile(szZipFilePath);    
      Enumeration en = zf.entries();
      
      while(en.hasMoreElements())
      {
        zipEntries.addElement(
	  (ZipEntry)en.nextElement());
      }
      
      for (i = 0; i < zipEntries.size(); i++)
      {
        ZipEntry ze = 
	  (ZipEntry)zipEntries.elementAt(i);
	  
        extractFromZip(szZipFilePath, 
          szExtractPath,
	  ze.getName(), zf, ze);
      }
      
      zf.close();
      System.out.println("Done!");
    }
    catch(Exception ex)
    {
      System.out.println(ex.toString());
    }
  }
  
  // ============================================
  // extractFromZip
  // ============================================
  static void extractFromZip(
    String szZipFilePath, String szExtractPath,
    String szName,
    ZipFile zf, ZipEntry ze)
  {
    if(ze.isDirectory())
      return;
      
    String szDstName = slash2sep(szName);
    
    String szEntryDir;
    
    if(szDstName.lastIndexOf(File.separator) != -1)
    {
      szEntryDir =
        szDstName.substring(
	  0, 
          szDstName.lastIndexOf(File.separator));
    }
    else	  
      szEntryDir = "";
    
    System.out.print(szDstName);
    long nSize = ze.getSize();
    long nCompressedSize = 
      ze.getCompressedSize();
    
    System.out.println(" " + nSize + " (" +
      nCompressedSize + ")");  
  
    try
    {
       File newDir = new File(szExtractPath +
	 File.separator + szEntryDir);
	 
       newDir.mkdirs();	 
       
       FileOutputStream fos = 
	 new FileOutputStream(szExtractPath +
	 File.separator + szDstName);

       InputStream is = zf.getInputStream(ze);
       byte[] buf = new byte[1024];

       int nLength;
       
       while(true)
       {
         try
         {
	   nLength = is.read(buf);
         }	 
         catch (EOFException ex)
         {
	   break;
	 }  
	 
         if(nLength < 0) 
	   break;
         fos.write(buf, 0, nLength);
       }
       
       is.close();
       fos.close();
    }   
    catch(Exception ex)
    {
      System.out.println(ex.toString());
      System.exit(0);
    }
  }  
  
  // ============================================
  // slash2sep
  // ============================================
  static String slash2sep(String src)
  {
    int i;
    char[] chDst = new char[src.length()];
    String dst;
    
    for(i = 0; i < src.length(); i++)
    {
      if(src.charAt(i) == '/')
        chDst[i] = File.separatorChar;
      else
        chDst[i] = src.charAt(i);
    }
    dst = new String(chDst);
    return dst;
  }

  // ============================================
  // getKbdString
  // ============================================
  static public String getKbdString()
  {
    byte bKbd[] = new byte[256];
    int iCnt = 0;
    String szStr = "";
    
    try
    {
      iCnt = System.in.read(bKbd);
    }
    catch(Exception ex)
    {
      System.out.println(ex.toString()); 
    }
      
    szStr = new String(bKbd, 0, iCnt);
    szStr = szStr.trim();
    return szStr;
  }
}

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