@Getter
public class BusinessException extends RuntimeException {

    private String message;

    private int code;

    public BusinessException(String message, int code) {
        this.message = message;
        this.code = code;
    }

    public BusinessException(String message) {
        super(message);
        this.message = message;
    }



}

@Slf4j
@Configuration
public class FeignExceptionConfig {

    @Bean
    public ErrorDecoder feignError() {
        return (key, response) -> {
            if (response.status() != HttpStatus.OK.value()) {
                try {
                    String data = IOUtils.toString(response.body().asInputStream());
                    log.error("feign請求錯誤,返回值為:{{}}", data);
                    throw new BusinessException(data);
                } catch (BusinessException e) {
                    throw e;
                } catch (Exception e) {
                    log.error("異常信息為:", e);
                    throw new RuntimeException(e);
                }
            }

            // 其他異常交給Default去解碼處理
            // 這里使用單例即可，Default不用每次都去new
            return new ErrorDecoder.Default().decode(key, response);
        };
    }

}

@ExceptionHandler(FeignException.class)
@ResponseStatus(HttpStatus.BAD_REQUEST)
public String handleFeignException(FeignException ex) {
    log.error("feign異常處理信息", ex);
    return ex.contentUTF8();
}