Checks whether the given setup with user credentials are valid for authentication (quick check)

CheckActiveDirectoryConnectionViaLdap_ForSpringSecurity.java

import javax.naming.NamingException;
import javax.naming.spi.NamingManager;
import java.util.Hashtable;

public class CheckActiveDirectoryConnectionViaLdap_ForSpringSecurity {

	public static void main(String... args) throws NamingException {
		Hashtable<String, String> table = new Hashtable<>();
		table.put("java.naming.factory.initial", "com.sun.jndi.ldap.LdapCtxFactory");
		table.put("java.naming.provider.url", "ldap://$HOST:389");
		table.put("java.naming.ldap.version", "3");
		table.put("java.naming.security.principal", "$USER");
		table.put("java.naming.security.authentication", "simple");
		table.put("java.naming.security.credentials", "$PASSWORD");
		table.put("java.naming.factory.object", "org.springframework.ldap.core.support.DefaultDirObjectFactory");
		NamingManager.getInitialContext(table);
	}

}