Holas, he encontrado esto. Me parece que lo que hace es listar los archivos contenidos en un jar. Espero que te sirva. Luego supongo que lo podrás filtrar por extensión como estas haciendo.
Código (java) [Seleccionar]
import java.util.jar.*;
import java.util.*;
import java.io.*;
public class PackageUtils {
private static boolean debug = true;
public static List getClasseNamesInPackage
(String jarName, String packageName){
ArrayList classes = new ArrayList ();
packageName = packageName.replaceAll("\\." , "/");
if (debug) System.out.println
("Jar " + jarName + " looking for " + packageName);
try{
JarInputStream jarFile = new JarInputStream
(new FileInputStream (jarName));
JarEntry jarEntry;
while(true) {
jarEntry=jarFile.getNextJarEntry ();
if(jarEntry == null){
break;
}
if((jarEntry.getName ().startsWith (packageName)) &&
(jarEntry.getName ().endsWith (".class")) ) {
if (debug) System.out.println
("Found " + jarEntry.getName().replaceAll("/", "\\."));
classes.add (jarEntry.getName().replaceAll("/", "\\."));
}
}
}
catch( Exception e){
e.printStackTrace ();
}
return classes;
}
/**
*
*/
public static void main (String[] args){
List list = PackageUtils.getClasseNamesInPackage
("C:/j2sdk1.4.1_02/lib/mail.jar", "com.sun.mail.handlers");
System.out.println(list);
/*
output :
Jar C:/j2sdk1.4.1_02/lib/mail.jar looking for com/sun/mail/handlers
Found com.sun.mail.handlers.text_html.class
Found com.sun.mail.handlers.text_plain.class
Found com.sun.mail.handlers.text_xml.class
Found com.sun.mail.handlers.image_gif.class
Found com.sun.mail.handlers.image_jpeg.class
Found com.sun.mail.handlers.multipart_mixed.class
Found com.sun.mail.handlers.message_rfc822.class
[com.sun.mail.handlers.text_html.class,
com.sun.mail.handlers.text_xml.class, com
.sun.mail.handlers.image_jpeg.class,
, com.sun.mail.handlers.message_rfc822.class]
*/
}
}
