一个ldap的例子，虽然我知道在做什么，但是有结果了啊，嘻嘻

package com;

import javax.naming.Context;
import javax.naming.NamingEnumeration;
import javax.naming.directory.*;
import java.util.Hashtable;
import java.util.Enumeration;

/**
 * Created by IntelliJ IDEA.
 * To change this template use File | Settings | File Templates.
 */
public class JNDISearch {
    public static String INITCTX = "com.sun.jndi.ldap.LdapCtxFactory";
    public static String MY_HOST = "ldap://localhost:389";
    public static String MY_SEARCHBASE = "o=NetscapeRoot";
    public static String MY_FILTER = "ou=Administrators";

    public static void main(String[] args) {
        try {
            Hashtable env = new Hashtable();
            env.put(Context.INITIAL_CONTEXT_FACTORY, INITCTX);
            env.put(Context.PROVIDER_URL, MY_HOST);

            DirContext ctx = new InitialDirContext(env);
            SearchControls constraints = new SearchControls();
            constraints.setSearchScope(SearchControls.SUBTREE_SCOPE);

            NamingEnumeration results = ctx.search(MY_SEARCHBASE, MY_FILTER, constraints);
            while (results != null && results.hasMore()) {
                SearchResult sr = (SearchResult) results.next();
                String dn = sr.getName();
                System.out.println("Distinguished Name is " + dn);
                Attributes atts = sr.getAttributes();
                for (NamingEnumeration ne = atts.getAll(); ne.hasMoreElements();) {
                    Attribute attr = (Attribute) ne.next();
                    String attrID = attr.getID();
                    System.out.println(attrID + ":");
                    for (Enumeration vals = attr.getAll(); vals.hasMoreElements();) {
                        System.out.println(""t" + vals.nextElement());
                    }
                }
                System.out.println(""n");
            }
        } catch (Exception e) {
            e.printStackTrace();
            System.exit(1);
        }
    }
}