java ldap用户认证

package test;

import java.util.Hashtable;

import javax.naming.Context;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.directory.Attribute;
import javax.naming.directory.Attributes;
import javax.naming.directory.DirContext;
import javax.naming.directory.InitialDirContext;
import javax.naming.directory.SearchControls;
import javax.naming.directory.SearchResult;

public class LdapImpl {
    private DirContext ds;
 
    public void search() throws NamingException {
        System.out.println("Searching...");
        SearchControls searchCtls = new SearchControls();
 
        // Specify the search scope
        searchCtls.setSearchScope(SearchControls.SUBTREE_SCOPE);
        // specify the LDAP search filter
        String searchFilter = "(sAMAccountName=adamli)";
 
        // Specify the Base for the search
        String searchBase = "dc=XX,dc=XX";
 
        // Specify the attributes to return
        String returnedAtts[] = {"mail", "displayName"};
        searchCtls.setReturningAttributes(returnedAtts);
 
        // Search for objects using the filter
        NamingEnumeration<SearchResult> entries = ds.search(searchBase,
                searchFilter, searchCtls);
 
        // Loop through the search results
        while (entries.hasMoreElements()) {
            SearchResult entry = entries.next();
            System.out.println(">>>" + entry.getName());
            // Print out the groups
            Attributes attrs = entry.getAttributes();
            if (attrs != null) {
                for (NamingEnumeration<? extends Attribute> names = attrs
                        .getAll(); names.hasMore();) {
                    Attribute attr = names.next();
                    System.out.println("AttributeID: " + attr.getID());
                    for (NamingEnumeration<?> e = attr.getAll(); e.hasMore();) {
                        System.out.println("Attributes:" + e.next());
                    }
                }
            }
        }
        System.out.println("Search complete.");
    }
 
    public synchronized void connect() throws NamingException {
        System.out.println("connecting...");
        if (ds == null) {
            Hashtable<String, Object> env = new Hashtable<String, Object>(11);
            env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
            env.put(Context.PROVIDER_URL, "ldap://ip:port");
            env.put(Context.SECURITY_AUTHENTICATION, "simple");
            env.put(Context.SECURITY_PRINCIPAL, "username");
            env.put(Context.SECURITY_CREDENTIALS, "password");
 
            ds = new InitialDirContext(env);
        }
        System.out.println("connected.");
    }
 
    public void close() throws NamingException {
        System.out.println("closing...");
        ds.close();
        System.out.println("closed.");
    }
}

package test;
import javax.naming.NamingException;

public class LdapDemo {
	public static void main(String[] args) {
		LdapImpl ldap = new LdapImpl();
		try {
			ldap.connect();
			ldap.search();
		} catch (NamingException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}