FeignClient服务器抛出异常客户端处理方案

import com.test.JSONUtils;
import feign.Response;
import feign.Util;
import feign.codec.ErrorDecoder;
import io.test.BadRequestException;
import io.test.InternalServerErrorException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.annotation.Configuration;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import static feign.FeignException.errorStatus;


@Configuration
public class FeignClientErrorDecoder implements ErrorDecoder {
    private Logger logger = LoggerFactory.getLogger(FeignClientErrorDecoder.class);

    @Override
    public Exception decode(String methodKey, Response response) {
        Map<String, Object> jsonBody = new HashMap<>();
        jsonBody.put("message", "Internal server error");
        try {
            String body = Util.toString(response.body().asReader());
            jsonBody = JsonUtils.toMap(body);
        } catch (IOException e) {
            logger.error("feign.IOException", e);
        }
        assert jsonBody != null;
        if (response.status() >= 400 && response.status() < 500) {
            throw new BadRequestException(jsonBody.get("message").toString());
        }

        if (response.status() >= 500) {
            throw new InternalServerErrorException(jsonBody.get("message").toString());
        }

        return errorStatus(methodKey, response);
    }
}