java项目实现ldap认证

public static boolean ldapCheck(String userName, String password) { 
   
        String url = "LDAP://ldap的地址:389";

        String user = "uid="+userName+",cn=employees,ou=its,o=dc";

        Hashtable<String, Object> env = new Hashtable<>();
        env.put(Context.SECURITY_AUTHENTICATION, "simple");
        env.put(Context.SECURITY_PRINCIPAL, user);
        env.put(Context.SECURITY_CREDENTIALS, password);
        env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
        env.put(Context.PROVIDER_URL, url);
        DirContext ctx = null;
        try { 
   
            System.out.println("ldap认证成功...");
            ctx = new InitialDirContext(env);
            return Boolean.TRUE;
        } catch (Exception err) { 
   
            System.out.println("ldap认证失败...");
            return Boolean.FALSE;
        } finally { 
   
            try { 
   
                if (ctx != null) { 
   
                    ctx.close();
                }
            } catch (NamingException e) { 
   
                e.printStackTrace();
            }
        }
    }