java AD域认证

import java.util.Hashtable;

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


public class AdTest {
    public static void main(String[] args) {
        String userName = "jyl";//AD域认证，用户的登录UserName
        String password = "xxx";//AD域认证，用户的登录PassWord
        String host = "xxx";//AD域IP，必须填写正确   已经加入的域
        String domain = "xxx";//域名后缀
        String port = "389"; //端口，一般默认389
        String user = userName.indexOf(domain) > 0 ? userName : userName
                + domain;
        connect(host, port, user, password);
    }
    public static void connect(String host, String port, String username, String password) {
        DirContext ctx = null;
        Hashtable<String, String> HashEnv = new Hashtable<String, String>();
        HashEnv.put(Context.SECURITY_AUTHENTICATION, "simple"); // LDAP访问安全级别(none,simple,strong);
        HashEnv.put(Context.SECURITY_PRINCIPAL, username); // AD的用户名
        HashEnv.put(Context.SECURITY_CREDENTIALS, password); // AD的密码
        HashEnv.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory"); // LDAP工厂类
        HashEnv.put("com.sun.jndi.ldap.connect.timeout", "3000");// 连接超时设置为3秒
        HashEnv.put(Context.PROVIDER_URL, "ldap://" + host + ":" + port);// 默认端口389
        try {
            ctx = new InitialDirContext(HashEnv);// 初始化上下文
            System.out.println("身份验证成功!");
        } catch (AuthenticationException e) {
            System.out.println("身份验证失败!");
            e.printStackTrace();
        } catch (javax.naming.CommunicationException e) {
            System.out.println("AD域连接失败!");
            e.printStackTrace();
        } catch (Exception e) {
            System.out.println("身份验证未知异常!");
            e.printStackTrace();
        } finally {
            if (null != ctx) {
                try {
                    ctx.close();
                    ctx = null;
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
    }
}```