Add jar contents to the deployment archive under the given prefix : JarFile « File « Java Tutorial

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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * Lesser General Public License for more details.
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import java.util.ArrayList;
import java.util.jar.JarEntry;
import java.util.jar.JarInputStream;
import java.util.jar.JarOutputStream;

 * A collection of jar utilities
 * @author
 * @version $Revision: 81011 $
public class JarUtils {
   * Add jar contents to the deployment archive under the given prefix
  public static String[] addJar(JarOutputStream outputStream, String prefix, File jar)
      throws IOException {

    ArrayList tmp = new ArrayList();
    FileInputStream fis = new FileInputStream(jar);
    JarInputStream jis = new JarInputStream(fis);
    JarEntry entry = jis.getNextJarEntry();
    while (entry != null) {
      if (entry.isDirectory() == false) {
        String entryName = prefix + entry.getName();
        addJarEntry(outputStream, entryName, jis);
      entry = jis.getNextJarEntry();
    String[] names = new String[tmp.size()];
    return names;

   * Add a jar entry to the deployment archive
  public static void addJarEntry(JarOutputStream outputStream, String entryName,
      InputStream inputStream) throws IOException {
    outputStream.putNextEntry(new JarEntry(entryName));
    copyStream(outputStream, inputStream);

   * Copies the input stream to the output stream
  public static void copyStream(OutputStream outputStream, InputStream inputStream)
      throws IOException {
    byte[] bytes = new byte[4096];
    int read =, 0, 4096);
    while (read > 0) {
      outputStream.write(bytes, 0, read);
      read =, 0, 4096);


11.63.1.Creating a JAR File
11.63.2.Create JarFile and use Pack200.Packer
11.63.3.List all file names in a jar file
11.63.4.Listing the Entries of a JAR File Manifest
11.63.5.Listing the Main Attributes in a JAR File Manifest
11.63.6.Retrieves the manifest from a JAR file and writes the manifest contents to a file.
11.63.7.Get uncompressed and compressed file size in a Jar file
11.63.8.Get zip method: ZipEntry.STORED, ZipEntry.DEFLATED
11.63.9.Get CRC code for each file in a Jar file
11.63.10.Get file comment
11.63.11.Get resource from Jar file
11.63.12.JAR Archives: Jar Lister
11.63.13.JAR Archives: Packer200
11.63.14.JAR Archives: Unpacker200
11.63.15.Jar Entry OutputStream
11.63.16.Get jar file Attribute
11.63.17.Get the jar entry
11.63.18.Get the jar file
11.63.19.Search class in class path and Jar files
11.63.20.Add jar contents to the deployment archive under the given prefix
11.63.21.Manifest Writer
11.63.22.Make Temp Jar
11.63.23.Load resource from Jar file
11.63.24.A class to find resources in the classpath by their mime-type specified in the MANIFEST.