LDAP connection in Java

Example class to connect to Microsoft LDAP server

package ldap;

import java.io.IOException;
import java.util.Hashtable;
import java.util.Properties;

import javax.naming.Context;
import javax.naming.NamingException;
import javax.naming.directory.DirContext;
import javax.naming.directory.InitialDirContext;

public class ConnectLDAP {

	
	public static void main(String[] args) {
		Hashtable<String, String> env = new Hashtable<>();
		env.put(Context.INITIAL_CONTEXT_FACTORY, properties().getProperty("ldap.factories.initctx"));
		env.put(Context.PROVIDER_URL,properties().getProperty("ldap.host"));
		env.put(Context.SECURITY_AUTHENTICATION, "simple");
		env.put(Context.SECURITY_PRINCIPAL, properties().getProperty("ldap.user"));
		env.put(Context.SECURITY_CREDENTIALS, properties().getProperty("ldap.password"));
		
		DirContext ctx = null;
		
		try{
			 ctx = new InitialDirContext(env);
		    System.out.println("connected");
		    System.out.println(ctx.getEnvironment());
		
			
		} catch (NamingException e) {
			e.printStackTrace();
		}finally{
			if(ctx != null){
				try {
					ctx.close();
				} catch (NamingException e) {
					e.printStackTrace();
				}
			}
		}
	}
	
	
	
	private static Properties props;
	static Properties properties() {
		if(props == null){
			props = new Properties();
			try {
				props.load(ConnectLDAP.class.getResourceAsStream("ldap.properties"));
			} catch (IOException e) {
				
				e.printStackTrace();
				throw new RuntimeException(e);
			}
		}
		return props;
	}
}

property file in the sample package locatiion

# LDAP parameters
ldap.host =ldap://ldap.server.com:389
ldap.factories.initctx =com.sun.jndi.ldap.LdapCtxFactory
ldap.user=domain\\userName
ldap.password=password

LDAP Source