为了克服这个缺点，我将引用代码中的实现类（而不是依赖于spring Boot 的自动配置）

@Bean
public Client feignClient(HttpClient httpClient) {
    var client = new ApacheHttpClient(httpClient);
    return (request, options) -> convertResponse(client.execute(request, options));
}

private Response convertResponse(Response response) throws IOException {

    // ...
}

SynchronousMethodHandler使用feign.Logger打印假装请求过程前后的日志，除非日志级别为NONE，调用顺序如下：

1. logger.logResuest(configKey, logLevel, request)
2. response = client.execute(request, options)
3. response = logger.logAndRebufferResponse(configKey, logLevel, response, elapsedTime)
   此记录器是由**DefaultFeignLoggerFactory#create（）**创建的。如果您定义自己的记录器并将其注册为SringBean，DefaultFeignLoggerFactory应使用自己的记录器来打印日志，您可以在FeignClientsConfigurations中看到记录器为@Autowired(required = false)。因此您应定义自己的记录器，例如：

public class MyFeignLogger extends Slf4jLogger {

    @Override
    protected Response logAndRebufferResponse(String configKey, Logger.Level logLevel, Response response, long elapsedTime) {
        Response rsp = super.logAndRebufferResponse(configKey, logLevel, response, elapsedTime);
        //you can change response status here by java reflect. 
        if(xxxx) {
            ReflectUtil.setFieldValue(rsp, "status", 400);
        }
        return rsp;
    }
}

然后将此类注册为Bean：

@Configuration
@AutoConfiguration(FeignClientsConfiguration.class)
public class MyFeignConfiguration {

    @Bean
    @Primary
    public Logger.Level feignLoggerLevel() {
        return Logger.Level.FULL;
    }

    @Bean
    @Primary
    public Logger feignLogger() {
        return new MyFeignLogger();
    }
}

这很管用。