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Compressing Streams: Zipper, Java example Java code example - Click here to copy ->>>

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/* Title: Hardcore Java
* Title: Java I/O
* Second Edition: May 2006
* ISBN 10: 0-596-52750-0

Code:



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

public class Zipper {

  public static void main(String[] args) throws IOException {
 
    if (args.length < 2) {
      System.out.println("Usage: java Zipper [-d level] name.zip"+
                         " file1 file2...");
      return;
    }
   
    String outputFile = args[0];
    // Default to maximum compression
    int level = 9;
    int start = 1;
    if (args[0].equals("-d")) {
      try {
        level = Integer.parseInt(args[1]);
        outputFile = args[2];
        start = 3;
      }
      catch (Exception ex) {
        System.out.println("Usage: java Zipper [-d level] name.zip"
                        + " file1 file2...");
        return;         
      }
    }   
   
    FileOutputStream fout = new FileOutputStream(outputFile);
    ZipOutputStream zout = new ZipOutputStream(fout);
    zout.setLevel(level);
    for (int i = start; i < args.length; i++) {
      ZipEntry ze = new ZipEntry(args[i]);
      FileInputStream fin = new FileInputStream(args[i]);
      try {
        System.out.println("Compressing " + args[i]);
        zout.putNextEntry(ze);
        for (int c = fin.read(); c != -1; c = fin.read()) {
          zout.write(c);
        }
      }
      finally {
        fin.close();
      }
    }
    zout.close();
  }
}


 



References.

The list of classes which were used on this page you can find below. The links to Java API contain official SUN documentation about all used classes.

  java.util.zip.Inflater

  java.io.IOException

  java.lang.Exception

  java.io.FileOutputStream

  java.util.zip.ZipOutputStream

  java.util.zip.ZipEntry

  java.io.FileInputStream




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