JNDI : Get information of an object in the directory

In this post, I am going to explain how to get information of an object from directory. For example, I am going to retrieve information for the distinguished name "cn=Hari,ou=people,dc=example,dc=com".

Get data from LDAP.png

import java.util.Objects;
import java.util.Properties;

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

public class DirectoryUtil {
    private final static String FACTORY = "com.sun.jndi.ldap.LdapCtxFactory";
    private final static String PROVIDER_URL = "ldap://localhost:10389";
    private static DirContext context = null;

    public static DirContext getContext() throws NamingException {
        if (!Objects.isNull(context)) {
            return context;
        }

        Properties properties = new Properties();
        properties.put(Context.INITIAL_CONTEXT_FACTORY, FACTORY);
        properties.put(Context.PROVIDER_URL, PROVIDER_URL);
        DirContext context = new InitialDirContext(properties);
        return context;
    }
}

import javax.naming.NamingException;
import javax.naming.directory.Attributes;
import javax.naming.directory.DirContext;

public class Test {

    public static void main(String[] args) throws NamingException {
        DirContext context = DirectoryUtil.getContext();

        Attributes attrs = context
                .getAttributes("cn=Hari,ou=people,dc=example,dc=com");
        System.out.println("Surname: " + attrs.get("sn").get());
        System.out.println("Common name : " + attrs.get("cn").get());
        System.out.println("Description : " + attrs.get("description").get());

    }

}

Output

Surname: Gurram

Common name : Hari

Description : Software professional, code for Company XYZ

Reference

http://docs.oracle.com/javase/jndi/tutorial/

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