初学Spring Cloud踩得坑之Caused by: org.springframework.context.ApplicationContextException

Caused by: org.springframework.context.ApplicationContextException: Unable to start ServletWebServerApplicationContext due to missing ServletWebServerFactory bean.

/*
* 提示：该行代码过长，系统自动注释不进行高亮。一键复制会移除系统注释 
* D:\java\jdk1.8.0_201\bin\java.exe -XX:TieredStopAtLevel=1 -noverify -Dspring.output.ansi.enabled=always -Dcom.sun.management.jmxremote -Dspring.liveBeansView.mbeanDomain -Dspring.application.admin.enabled=true "-javaagent:C:\JetBrains\idea\Intellij IDEA\IntelliJ IDEA 2018.1.4\lib\idea_rt.jar=61907:C:\JetBrains\idea\Intellij IDEA\IntelliJ IDEA 2018.1.4\bin" -Dfile.encoding=UTF-8 -classpath 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cn.itcast.UserApplication
*/

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 :: Spring Boot ::        (v2.0.4.RELEASE)

2019-09-14 11:15:48.564  INFO 9696 --- [           main] cn.itcast.UserApplication                : Starting UserApplication on DESKTOP-12MVDLN with PID 9696 (C:\User\workspace_idea\leyou-shop\cloud-demo\user-serivce\target\classes started by 凌枫lqg in C:\User\workspace_idea\leyou-shop\cloud-demo)
2019-09-14 11:15:48.579  INFO 9696 --- [           main] cn.itcast.UserApplication                : No active profile set, falling back to default profiles: default
2019-09-14 11:15:48.688  INFO 9696 --- [           main] ConfigServletWebServerApplicationContext : Refreshing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@7a69b07: startup date [Sat Sep 14 11:15:48 CST 2019]; root of context hierarchy
2019-09-14 11:15:49.133  WARN 9696 --- [           main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.context.ApplicationContextException: Unable to start ServletWebServerApplicationContext due to missing ServletWebServerFactory bean.
2019-09-14 11:15:49.649 ERROR 9696 --- [           main] o.s.boot.SpringApplication               : Application run failed

org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.context.ApplicationContextException: Unable to start ServletWebServerApplicationContext due to missing ServletWebServerFactory bean.
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:155) ~[spring-boot-2.0.4.RELEASE.jar:2.0.4.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:544) ~[spring-context-5.0.8.RELEASE.jar:5.0.8.RELEASE]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140) ~[spring-boot-2.0.4.RELEASE.jar:2.0.4.RELEASE]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:762) [spring-boot-2.0.4.RELEASE.jar:2.0.4.RELEASE]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:398) [spring-boot-2.0.4.RELEASE.jar:2.0.4.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:330) [spring-boot-2.0.4.RELEASE.jar:2.0.4.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1258) [spring-boot-2.0.4.RELEASE.jar:2.0.4.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1246) [spring-boot-2.0.4.RELEASE.jar:2.0.4.RELEASE]
	at cn.itcast.UserApplication.main(UserApplication.java:13) [classes/:na]
Caused by: org.springframework.context.ApplicationContextException: Unable to start ServletWebServerApplicationContext due to missing ServletWebServerFactory bean.
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.getWebServerFactory(ServletWebServerApplicationContext.java:204) ~[spring-boot-2.0.4.RELEASE.jar:2.0.4.RELEASE]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.createWebServer(ServletWebServerApplicationContext.java:178) ~[spring-boot-2.0.4.RELEASE.jar:2.0.4.RELEASE]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:152) ~[spring-boot-2.0.4.RELEASE.jar:2.0.4.RELEASE]
	... 8 common frames omitted


Process finished with exit code 1