Search in LDAP

Question

Hi, I have a jave program to do search from LDAP server and then get return. I can get return. The only problem is the return order. The order I want to get is sn, givenName, phone, Email. But the return I always got is order by phone, Email, givenName, sn.
My code is as below:
class LdapTest {
public static void main(String[] args) {
try {
     Hashtable env = new Hashtable();
     env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
     env.put(Context.PROVIDER_URL, "ldap=myserver");
DirContext ctx = new InitialDirContext(env);
String[] attrIDs = { "sn", "givenName", "phone", "Email"};
SearchControls cts = new SearchControls();
cts.setReturningAttributes(attrIDs);
cts.setSearchScope(SearchControls.SUBTREE_SCOPE)
String filter="(sn=" + args[0] + ")";
NamingEnumeration results = ctx.search("", filter, cts);
while (results != null && results.hasMore()) {
SearchResult sr = (SearchResult) results.next();
Attributes attrs = sr.getAttributes();
for (NamingEnumeration ne = attrs.getAll();
ne.hasMoreElements(); ) {
Attribute attr = (Attribute) ne.next();
String attrID = attr.getID();
System.out.println(attrID + ":");
for (Enumeration vals = attr.getAll(); vals.hasMoreElements(); ) {
System.out.println("\t" + vals.nextElement());
System.out.println("\n");
} catch (Exception e) {
e.printStackTrace();
System.exit(1);
What I got is:
phone:
123-4567
Email:
[email protected]
givenName:
first name
sn:
last name
But what I want to get is:
sn:
givenname:
phone:
Email:
Dose anybody know how to get the return by right order?
Thanks!

Answer 1

while (results != null && results.hasMore()) {
  SearchResult sr = (SearchResult) results.next();
  Attributes attrs = sr.getAttributes();
  printAttribute(attrs.get("sn"));
  printAttribute(attrs.get("givenname"));
  printAttribute(attrs.get("phone"));
  printAttribute(attrs.get("email"));
private void printAttribute(Attribute attr){
  System.out.println(attr.getID() + ":");
  for (Enumeration vals = attr.getAll(); vals.hasMoreElements(); ) {
    System.out.println("\t" + vals.nextElement());
}