Java Tutorial/File/ZipOutputStream

Compressing Streams: Zipper, Java example

   <source lang="java">

import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.util.zip.ZipEntry; import java.util.zip.ZipOutputStream; public class Main {

 public static void main(String[] args) throws IOException {
   String outputFile = "a.zip";
   int level = 9;
   FileOutputStream fout = new FileOutputStream(outputFile);
   ZipOutputStream zout = new ZipOutputStream(fout);
   zout.setLevel(level);
   ZipEntry ze = new ZipEntry("a.zip");
   FileInputStream fin = new FileInputStream("b.dat");
   zout.putNextEntry(ze);
   for (int c = fin.read(); c != -1; c = fin.read()) {
     zout.write(c);
   }
   fin.close();
   zout.close();
 }

}</source>

Create ZipOutputStream from FileOutputStream

   <source lang="java">

import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.util.zip.ZipEntry; import java.util.zip.ZipOutputStream; public class MainClass {

 public static void main(String[] args) throws IOException {
   String outputFile = "new.zip";
   // Default to maximum compression
   int level = 9;
   int start = 1;
   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();
 }

}</source>