通过spring boot调用soap web服务失败，出现未授权的401异常。

import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.web.reactive.function.client.WebClient;

public class SoapClient {
    public static void main(String[] args) {
        String username = "yourUsername";
        String password = "yourPassword";

        WebClient webClient = WebClient.builder()
                .defaultHeader(HttpHeaders.AUTHORIZATION, "Basic " + java.util.Base64.getEncoder().encodeToString((username + ":" + password).getBytes()))
                .build();

        String soapRequest = "<soap:Envelope xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">" +
                "<soap:Body>" +
                "<yourRequestElement>Value</yourRequestElement>" +
                "</soap:Body>" +
                "</soap:Envelope>";

        webClient.post()
                .uri("http://your-web-service-url")
                .contentType(MediaType.APPLICATION_SOAP)
                .bodyValue(soapRequest)
                .retrieve()
                .bodyToMono(String.class)
                .block();
    }
}