Java tutorial
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(); } }