在Spring WebClient中使用exchange()时如何抛出WebClientResponseException

import org.springframework.http.HttpStatus;
import org.springframework.web.reactive.function.client.ClientResponse;
import org.springframework.web.reactive.function.client.WebClient;
import import org.springframework.web.reactive.function.client.WebClientResponseException;

WebClient client = WebClient.create();

client.get()
    .uri("https://example.com/api")
    .exchange()
    .onStatus(HttpStatus::is4xxClientError, response -> response.bodyToMono(String.class)
        .flatMap(errorBody -> Mono.error(new WebClientResponseException(
            response.statusCode().value(),
            response.statusCode().getReasonPhrase(),
            response.headers().asHttpHeaders(),
            errorBody.getBytes(),
            Charset.defaultCharset()
        )))
    )
    .onStatus(HttpStatus::is5xxServerError, response -> response.bodyToMono(String.class)
        .flatMap(errorBody -> Mono.error(new WebClientResponseException(
            response.statusCode().value(),
            response.statusCode().getReasonPhrase(),
            response.headers().asHttpHeaders(),
            errorBody.getBytes(),
            Charset.defaultCharset()
        )))
    )
    .flatMap(response -> response.bodyToMono(String.class))
    .subscribe(
        result -> {
            // 处理成功的响应
        },
        error -> {
            if (error instanceof WebClientResponseException) {
                WebClientResponseException responseException = (WebClientResponseException) error;
                // 处理异常的响应
            } else {
                // 处理其他异常
            }
        }
    );