如何使用JAVA/JNDI开发LDAP应用

hrsgcxqq

请那位高手帮忙解决一个问题

import javax.naming.directory.*;
import javax.naming.*;
import java.util.Hashtable;
public class add {
   public add() {
  }
  public static void main(String[] args) {
String password = "cm";
   String basedn = "dc=cm,dc=com";
   DirContext ctx = null;
   Hashtable env = new Hashtable();
  env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory";   env.put(Context.PROVIDER_URL, "ldap://localhost:389/"+basedn );
  env.put(Context.SECURITY_PRINCIPAL, "cn=root,"+basedn );
  env.put(Context.SECURITY_CREDENTIALS, password);

  try {
ctx = new InitialDirContext(env);
System.out.println("认证成功";
  }
  catch (javax.naming.AuthenticationException e) {
    System.out.println("认证失败";
  }
  catch (Exception e) {
    System.out.println("认证出错：" + e);
  }
  try{
          DirContext schemaCtx = ctx.getSchema("";
          BasicAttributes attrs = new BasicAttributes(true);
          attrs.put("NAME", "test";
      attrs.put("NUMERICOID", "1.3.6.1.4.1.7914.1.2.1.16";
          attrs.put("SYNTAX", "1.3.6.1.4.1.1466.115.121.1.15";
          attrs.put("SINGLE-VALUE", "TRUE";
          schemaCtx.createSubcontext("AttributeDefinition/test", attrs);
  System.out.println("ok";
  }catch(Exception e){
  System.out.println("Exception in add():"+e);
}
   }
}

提示：
认证成功
Exception in add():javax.naming.OperationNotSupportedException: [LDAP: error code 53 - modification of subschema subentry not supported]; remaining name ''

怎么处理此异常啊，谢谢回复