Idap AD 验证用户名和密码

import java.util.HashMap; 

import java.util.Hashtable; 

import java.util.Map; 
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.SearchControls; 
import javax.naming.directory.SearchResult; 
import javax.naming.ldap.InitialLdapContext; 
import javax.naming.ldap.LdapContext; 
public class ADAuthenticator {
   

  private String domain; 
  private String ldapHost; 
  private String searchBase; 
  public ADAuthenticator() 
   { 

   this.domain = "rd.**.com"; 

      this.ldapHost = "ldap://**.rd.**.com"; 

       this.searchBase = "dc=rd,dc=ge**,dc=com"; 

     } 

     

     public ADAuthenticator(String domain, String host, String dn) 

     { 

       this.domain = domain;