Q:

Java LDAP Authentication using username and password

I have a working code snippet by which i can authenticate a user by dn and password. My requirement is that the user will be entering his username(sAMAccountName) and I want to authenticate using sAMAccountName and password. How can I modify this code to achieve it?
    String userName = "John P R-Asst General Manager";
    String passWord = "asdfgh123";
    String base ="OU=SOU,DC=example,DC=com";
    String dn = "cn=" + userName + "," + base;

    String ldapURL = "ldap://mdsdc3.example.com:389";
    authEnv.put(Context.INITIAL_CONTEXT_FACTORY,"com.sun.jndi.ldap.LdapCtxFactory");
    authEnv.put(Context.PROVIDER_URL, ldapURL);
    authEnv.put(Context.SECURITY_AUTHENTICATION, "simple");
    authEnv.put(Context.SECURITY_PRINCIPAL, dn);
    authEnv.put(Context.SECURITY_CREDENTIALS, password);

    try {
        DirContext authContext = new InitialDirContext(authEnv);
        return true;

    } catch (NamingException namEx) {
        return false;
    }

A:

I hope this helps many of you.
You don't need to all user hierarchy with CN, DN, etc.
You can login just passing  domain\user  and password.
I've my code working as it is bellow:
try
    {
        // Set up the environment for creating the initial context
        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://ldap_server:389");
        // 
        env.put(Context.SECURITY_AUTHENTICATION, "simple");
        env.put(Context.SECURITY_PRINCIPAL, "domain\\user"); //we have 2 \\ because it's a escape char
        env.put(Context.SECURITY_CREDENTIALS, "test");

        // Create the initial context

        DirContext ctx = new InitialDirContext(env);
        boolean result = ctx != null;

        if(ctx != null)
            ctx.close();

        return result;
    }
    catch (Exception e)
    {           
        return false;
    }

