添加Feign的fallback中如何返回下游服务异常的示例

src/main/java/com/kingboy/common/config/swagger/SwaggerConfig.java

 package com.kingboy.common.config.swagger;
 
 import lombok.Data;
-import org.springframework.beans.factory.annotation.Value;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.boot.context.properties.ConfigurationProperties;