java中Webclient对象如何解析400状态码详解

Mono<String> mono = getWebClient()
    .get()    // 发送GET 请求
    .uri("/postss/1")  //服务请求路径，基于baseurl
    .retrieve() // 获取响应体
    .onStatus(e -> e.is4xxClientError(), resp -> {
        System.out.println("发生客户端输入错误：" + resp.statusCode().value() + " " + resp.statusCode().getReasonPhrase());
        return Mono.error(new RuntimeException("请求失败"));
    })
    .onStatus(e -> e.is5xxServerError(), resp -> {
        System.out.println("发生服务端错误：" + resp.statusCode().value() + " " + resp.statusCode().getReasonPhrase());
        return Mono.error(new RuntimeException("服务器异常"));
    })
    .bodyToMono(String.class); //响应数据类型转换
System.out.println(mono.block());

HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
if (response.statusCode() == 400) {
    String body = response.body();
    // 分析body中的错误信息
}

public class BadRequestException extends Exception {
    public BadRequestException(String message) {
        super(message);
    }
}
// 使用自定义异常处理
try {
    HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
    if (response.statusCode() == 400) {
        throw new BadRequestException(response.body());
    }
} catch (IOException | InterruptedException e) {
    e.printStackTrace();
} catch (BadRequestException be) {
    // 处理400错误
    System.out.println(be.getMessage());
}