Configuring LDAP and JAVA

[peiceonly]

How can I authenticate a user against LDAP in java ?
Do sun has direct API for this ?

[goldhouse]

The following example shows how, by using a simple clear-text password, a client authenticates to an LDAP server.

    // Set up the environment for creating the initial context
    Hashtable env = new Hashtable();
    env.put(Context.INITIAL_CONTEXT_FACTORY, 
        "com.sun.jndi.ldap.LdapCtxFactory");
    env.put(Context.PROVIDER_URL, "ldap://localhost:389/o=JNDITutorial");

    // Authenticate as S. User and password "mysecret"
    env.put(Context.SECURITY_AUTHENTICATION, "simple");
    env.put(Context.SECURITY_PRINCIPAL, "cn=S. User, ou=NewHires, o=JNDITutorial");
    env.put(Context.SECURITY_CREDENTIALS, "mysecret");

    // Create the initial context
    DirContext ctx = new InitialDirContext(env);

    // ... do something useful with ctx

If it returns DirContext then there is no error else it will throws exception

[goldhouse]

For further reading refer LDAP Authentication