Java tutorial
import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.util.jar.JarEntry; import java.util.jar.JarOutputStream; import java.util.jar.Manifest; public class Main { public static int BUFFER_SIZE = 10240; void createJarArchive(File archiveFile, File[] tobeJared) throws Exception { byte buffer[] = new byte[BUFFER_SIZE]; FileOutputStream stream = new FileOutputStream(archiveFile); JarOutputStream out = new JarOutputStream(stream, new Manifest()); for (int i = 0; i < tobeJared.length; i++) { if (tobeJared[i] == null || !tobeJared[i].exists() || tobeJared[i].isDirectory()) continue; // Just in case... JarEntry jarAdd = new JarEntry(tobeJared[i].getName()); jarAdd.setTime(tobeJared[i].lastModified()); out.putNextEntry(jarAdd); FileInputStream in = new FileInputStream(tobeJared[i]); while (true) { int nRead = in.read(buffer, 0, buffer.length); if (nRead <= 0) break; out.write(buffer, 0, nRead); } in.close(); } out.close(); stream.close(); } }