Simple LDAP Client

package com.ldap;

import java.util.Hashtable;

import javax.naming.Context;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.directory.Attributes;
import javax.naming.directory.BasicAttributes;
import javax.naming.directory.DirContext;
import javax.naming.directory.InitialDirContext;
import javax.naming.directory.SearchControls;
import javax.naming.directory.SearchResult;

public class SimpleLDAPClient {
	public static void main(String[] args) {
		Hashtable<String, String> env = new Hashtable<String, String>();

		env.put(Context.INITIAL_CONTEXT_FACTORY,"com.sun.jndi.ldap.LdapCtxFactory");
		// env.put(Context.PROVIDER_URL, "ldap://localhost:10389/ou=system");
		// env.put(Context.PROVIDER_URL, "ldap://domainName");
		// env.put(Context.PROVIDER_URL,
		// "ldap://domainName.companyName.com:389");
		env.put(Context.PROVIDER_URL, "ldap://pte-am:389");
		// env.put(Context.SECURITY_AUTHENTICATION, "simple");
		// env.put(Context.SECURITY_PRINCIPAL, "uid=admin,ou=system");
		env.put(Context.SECURITY_PRINCIPAL, "domainName\\userid");
		env.put(Context.SECURITY_CREDENTIALS, "Password");
		/*
		 * env.put(Context.SECURITY_PRINCIPAL, "domainName\\userid");
		 * env.put(Context.SECURITY_CREDENTIALS, "password");
		 */

		/*
		 * env.put(Context.SECURITY_PRINCIPAL, "domainName\\userid");
		 * env.put(Context.SECURITY_CREDENTIALS, "password");
		 */

		DirContext ctx = null;
		NamingEnumeration results = null;
		try {
			ctx = new InitialDirContext(env);

			SearchControls controls = new SearchControls();
			controls.setSearchScope(SearchControls.ONELEVEL_SCOPE);
			// results = ctx.search("cn=users,DC=domainName,DC=companyName,DC=com",
			// "(objectclass=user)", controls);
			// results = ctx.search("cn=users,DC=domainName,DC=companyName,DC=com",
			// "(objectclass=person)", controls);

			Attributes matchAttrs = new BasicAttributes(true);
			// matchAttrs.put(new BasicAttribute("sn","AFUsersExchange"));
			// matchAttrs.put(new BasicAttribute("sn","smtp"));
			// matchAttrs.put(new BasicAttribute("mail"));
			// results =
			// ctx.search("cn=users,DC=prod-am,DC=companyName,DC=com",matchAttrs);

			// String[] attrNames = {"sn", "telephonenumber", "mail"};
			String[] attrNames = { "sn", "mail", "cn", "o", "title" };
			results = ctx.search("cn=users,DC=domainName,DC=companyName,DC=com",
					matchAttrs, attrNames);

			// results =
			// ctx.search("cn=users,DC=domainName,DC=companyName,DC=com",matchAttrs);

			int count = 0;
			while (results.hasMore()) {
				SearchResult searchResult = (SearchResult) results.next();
				System.out.println(count++);
				Attributes attributes = searchResult.getAttributes();
				System.out.println(attributes + "\n");
			}

			/*
			 * while (results.hasMore()) { SearchResult searchResult =
			 * (SearchResult) results.next(); Attributes attributes =
			 * searchResult.getAttributes(); //Attribute attr =
			 * attributes.get("userPrincipalName"); Attribute attr =
			 * attributes.get("cn"); System.out.println(attributes+"\n"); if
			 * (attr!=null) { String cn = (String) attr.get();
			 * System.out.println(" Person Common Name = " + cn); } }
			 */
		} catch (NamingException e) {
			throw new RuntimeException(e);
		} finally {
			if (results != null) {
				try {
					results.close();
				} catch (Exception e) {
				}
			}
			if (ctx != null) {
				try {
					ctx.close();
				} catch (Exception e) {
				}
			}
		}
	}
}