如何在java中获取客户端系统的用户名和域名，因为我可以使用request.getRemoteHost获取ip地址和主机名

String ipAddress = request.getRemoteAddr();
String hostName = request.getRemoteHost();

import jcifs.ntlmssp.NtlmFlags;
import jcifs.ntlmssp.Type1Message;
import jcifs.ntlmssp.Type2Message;
import jcifs.ntlmssp.Type3Message;
import jcifs.util.Base64;

import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
import java.io.UnsupportedEncodingException;

public class WindowsAuthUtils {
    public static String getWindowsUsername(HttpServletRequest request) throws IOException {
        String authorizationHeader = request.getHeader("Authorization");
        if (authorizationHeader != null && authorizationHeader.startsWith("NTLM ")) {
            byte[] msg = Base64.decode(authorizationHeader.substring(5));
            int off = 0, length, offset;
            if (msg[8] == 1) {
                byte[] type1 = new byte[32];
                System.arraycopy(msg, 0, type1, 0, 32);
                Type1Message type1Message = new Type1Message(type1);
                byte[] type2 = new byte[32];
                NtlmFlags flags = new NtlmFlags();
                flags.setFlag(4, true);
                flags.setFlag(1, true);
                flags.setFlag(2, true);
                Type2Message type2Message = new Type2Message(type2, flags, "domain", "server");
                return Base64.encode(type2Message.toByteArray());
            } else if (msg[8] == 3) {
                byte[] type3 = new byte[msg.length - 32];
                System.arraycopy(msg, 32, type3, 0, msg.length - 32);
                Type3Message type3Message = new Type3Message(type3);
                return type3Message.getUser();
            }
        }
        return null;
    }
}