LDAP for AD

LDAP.java

import javax.naming.Context;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.directory.*;
import java.util.Hashtable;

public class TestApp {
    public static void main(String[] args) {
        Hashtable<String, String> env = new Hashtable<>();
        env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
        env.put(Context.PROVIDER_URL, "ldap://192.168.2.2:389");
        env.put(Context.SECURITY_AUTHENTICATION, "simple");
        env.put(Context.SECURITY_PRINCIPAL, "username");
        env.put(Context.SECURITY_CREDENTIALS, "password");

        try {
            DirContext ctx = new InitialDirContext(env);

            SearchControls sc = new SearchControls();
            sc.setSearchScope(SearchControls.ONELEVEL_SCOPE);
            NamingEnumeration ne = ctx.search("CN=Users,DC=company,DC=com", "objectClass=*", sc);

            while (ne.hasMore()) {

                SearchResult result = (SearchResult) ne.next();
                Attributes attributes = result.getAttributes();
                System.out.println("id=" + parse(attributes.get("samaccountname")));
                System.out.println("name=" + parse(attributes.get("cn")));
                System.out.println("first_name=" + parse(attributes.get("givenname")));
                System.out.println("last_name=" + parse(attributes.get("sn")));
                System.out.println("=======================");
            }

            ctx.close();
        } catch (NamingException e) {
            e.printStackTrace();
        }
    }

    // sAMAccountType: 805306368 -> 805306368
    static String parse(Attribute attribute) {
        if(attribute == null) {
            return  "N/A";
        }
        String source = attribute.toString();
        int idx = source.indexOf(":");

        return source.substring(idx + 1, source.length()).trim();
    }
}