商城项目day10 购物车:
1.报错如下: UnsatisfiedDependencyException:
Unsatisfied dependency expressed through field 'cartService'; nested exception is
Error creating bean with name 'com.changgou.goods.feign.SkuFeign': FactoryBean threw exception on object creation; nested exception is java.lang.IllegalStateException: PathVariable annotation was empty on param 0.
2.原因: 路径变量注解的参数为空
3. 解决: 返回的Result
