这是Zuul的配置文件：
server.name=api-gateway-zuul
server.port=8888
zuul.routes.course.path=/course/**
zuul.routes.course.url=http://www.mooc.com:8081/course/
zuul.routes.user.path=/user/**
zuul.routes.user.url=http://www.mooc.com:8082/user/

通过http://www.mooc.com:8082/user/login和http://www.mooc.com:8081/course/courseList?token=XXX是可以正常访问后台服务的，但是通过Zuul就不可以：
http://www.mooc.com:8888/user/login
http://www.mooc.com:8888/course/courseList?token=XXX

Zuul正常启动，从日志来看也没有什么异常：
2018-10-13 07:28:14.594 INFO 1 — [ main] o.s.c.support.DefaultLifecycleProcessor : Starting beans in phase 0
2018-10-13 07:28:16.969 INFO 1 — [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8888 (http)
2018-10-13 07:28:17.364 INFO 1 — [ main] com.imooc.zuul.ServiceApplication : Started ServiceApplication in 216.8 seconds (JVM running for 224.93)
2018-10-13 07:32:07.267 INFO 1 — [nio-8888-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring FrameworkServlet 'dispatcherServlet’
2018-10-13 07:32:07.373 INFO 1 — [nio-8888-exec-1] o.s.web.servlet.DispatcherServlet : FrameworkServlet ‘dispatcherServlet’: initialization started
2018-10-13 07:32:10.054 INFO 1 — [nio-8888-exec-1] o.s.web.servlet.DispatcherServlet : FrameworkServlet ‘dispatcherServlet’: initialization completed in 2620 ms
2018-10-13 07:32:13.788 INFO 1 — [nio-8888-exec-1] o.s.c.n.zuul.web.ZuulHandlerMapping : Mapped URL path [/user/] onto handler of type [class org.springframework.cloud.netflix.zuul.web.ZuulController]
2018-10-13 07:32:13.808 INFO 1 — [nio-8888-exec-1] o.s.c.n.zuul.web.ZuulHandlerMapping : Mapped URL path [/course/] onto handler of type [class org.springframework.cloud.netflix.zuul.web.ZuulController]

请问啥原因呢？