download a certificate from a ldap server in java -

can explain me whether following code correct download certificate ties specific person in java? getting exception "unknown protocol: ldaps".

public void downloadcert() {     string urlstr="ldaps://aserversomewhere:636/cn=doe%20john,ou=personnel,o=comany123,c=us?cacertificate;binary";     url url = null;     try {         url = new url(urlstr);         urlconnection con = url.openconnection();         inputstream = con.getinputstream();         certificatefactory certfactory = certificatefactory.getinstance("x.509");         x509certificate cert = (x509certificate)certfactory.generatecertificate(is);         system.out.println("getversion: " + cert.getversion());      } catch (exception e) {           system.out.println(e.getmessage());      } } 

no isn't correct. there no handler ldaps: protocol in url/urlconnection system.

you can use jndi cacertificate attribute of user, via dircontext.getattributes().