ldap用户验证-用户名验证

使用用户名和密码来进行ldap验证，需要使用cn（用户名）、ou（组织）和dc（多个dc可以表示域名）等关键字。
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.ldap.InitialLdapContext;
import javax.naming.ldap.LdapContext;
/**
* This is a tool class for connecting to ldap.
* @author Jason
*/
public class CopyOfConnLDAP {
    //store the connected information
    private Hashtable env = null;
    //ldap context
    private LdapContext ctx = null;
    //set some connected information
    private String INITIAL_CONTEXT_FACTORY = "com.sun.jndi.ldap.LdapCtxFactory";
    private String PROVIDER_URL = "ldap://10.27.132.17:389";
    private String SECURITY_AUTHENTICATION = "simple";
    private String SECURITY_PRINCIPAL = "CN=视频会议组,OU=机关服务部,OU=信息技术服务中心,OU=集团公司机关,DC=CNPC,DC=COM,DC=CN";
    private String SECURITY_CREDENTIALS = "sphy321";
  
   
   
    public static void main(String[] args) {
     CopyOfConnLDAP con=new CopyOfConnLDAP();
     try {
     
      LdapContext ctxs = con.connectLdap();
      Attributes attrs = ctxs.getAttributes("CN=itest,OU=信息技术服务中心,OU=集团公司机关,DC=CNPC,DC=COM,DC=CN");
      for (NamingEnumeration ae = attrs.getAll(); ae.hasMore();) {
              Attribute attr = (Attribute) ae.next();
              System.out.println("attribute: " + attr.getID());
            
     for (NamingEnumeration e = attr.getAll(); e.hasMore(); System.out.println("value: " + e.next()));
     }
     } catch (NamingException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
     }

     }

   
    /** Creates a new instance of ConnLDAP */
    public CopyOfConnLDAP() {
        env = new Hashtable();
    }
  
    /**
     * Connect to ldap and initialize the ldap context.
     * @throws javax.naming.NamingException If connect fail,throw this exception.
     */
    public LdapContext connectLdap()throws NamingException{
        //set the initializing information of the context
        env.put(Context.INITIAL_CONTEXT_FACTORY, INITIAL_CONTEXT_FACTORY);
        //set the URL of ldap server
        env.put(Context.PROVIDER_URL, PROVIDER_URL);
        //set the authentication mode
        env.put(Context.SECURITY_AUTHENTICATION, SECURITY_AUTHENTICATION);
        //set user of AD
        env.put(Context.SECURITY_PRINCIPAL, SECURITY_PRINCIPAL);
        //set password of user
        env.put(Context.SECURITY_CREDENTIALS, SECURITY_CREDENTIALS);
        //initialize the ldap context
        ctx = new InitialLdapContext(env,null);
        return ctx;
    }
  
   
    public void closeContext() throws NamingException{
        ctx.close();
    }
  
    /**
     * Return the ldap context.
     * @return Return the ldap context.
     */
    public LdapContext getContext(){
        return this.ctx;
    }
   
}