Q：spring boot啟動後自動關閉，what fuck

spring boot啟動日誌：

D:\project\spring-boot-guide>mvn spring-boot:run
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building spring-boot Maven Webapp 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] >>> spring-boot-maven-plugin:1.5.4.RELEASE:run (default-cli) > test-compile @ spring-boot >>>
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ spring-boot ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 0 resource
[INFO] Copying 0 resource
[INFO]
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ spring-boot ---
[INFO] Nothing to compile - all classes are up to date
[INFO]
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ spring-boot ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory D:\project\spring-boot-guide\src\test\resources
[INFO]
[INFO] --- maven-compiler-plugin:3.1:testCompile (default-testCompile) @ spring-boot ---
[INFO] No sources to compile
[INFO]
[INFO] <<< spring-boot-maven-plugin:1.5.4.RELEASE:run (default-cli) < test-compile @ spring-boot <<<
[INFO]
[INFO] --- spring-boot-maven-plugin:1.5.4.RELEASE:run (default-cli) @ spring-boot ---


  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v1.5.4.RELEASE)


2017-06-09 15:07:29.320  INFO 2076 --- [           main] c.m.s.guide.controller.GuideController   : Starting GuideController on PC-JIAYI with PID 2076 (D:\project\spring-boot-guide\target\classes started by jiayi in D:\project\spring-boot-guide)
2017-06-09 15:07:29.336  INFO 2076 --- [           main] c.m.s.guide.controller.GuideController   : No active profile set, falling back to default profiles: default
2017-06-09 15:07:29.375  INFO 2076 --- [           main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot

[email protected]6fc0559b: startup date [Fri Jun 09 15:07:29 CST 2017]; root of context hierarchy
2017-06-09 15:07:30.474  INFO 2076 --- [           main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)
2017-06-09 15:07:30.484  INFO 2076 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2017-06-09 15:07:30.486  INFO 2076 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/8.5.15
2017-06-09 15:07:30.568  INFO 2076 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2017-06-09 15:07:30.568  INFO 2076 --- [ost-startStop-1] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 1196 ms
2017-06-09 15:07:30.682  INFO 2076 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean  : Mapping servlet: 'dispatcherServlet' to [/]
2017-06-09 15:07:30.686  INFO 2076 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'characterEncodingFilter' to: [/*]
2017-06-09 15:07:30.687  INFO 2076 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2017-06-09 15:07:30.687  INFO 2076 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2017-06-09 15:07:30.687  INFO 2076 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'requestContextFilter' to: [/*]
2017-06-09 15:07:30.952  INFO 2076 --- [           main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot

[email protected]6fc0559b: startup date [Fri Jun 09 15:07:29 CST 2017]; root of context hierarchy
2017-06-09 15:07:31.011  INFO 2076 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/],methods=[GET]}" onto public java.lang.String club.michaeljy.springboot.guide.controller.GuideController.home()
2017-06-09 15:07:31.015  INFO 2076 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.BasicErrorController.error(javax.servle
t.http.HttpServletRequest)
2017-06-09 15:07:31.016  INFO 2076 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.BasicErrorController.errorHtml(javax.servlet.http.HttpServletReq
uest,javax.servlet.http.HttpServletResponse)
2017-06-09 15:07:31.047  INFO 2076 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017-06-09 15:07:31.048  INFO 2076 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017-06-09 15:07:31.085  INFO 2076 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017-06-09 15:07:31.189  INFO 2076 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Registering beans for JMX exposure on startup
2017-06-09 15:07:31.244  INFO 2076 --- [           main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http)
2017-06-09 15:07:31.249  INFO 2076 --- [           main] c.m.s.guide.controller.GuideController   : Started GuideController in 2.294 seconds (JVM running for 4.799)
2017-06-09 15:07:31.250  INFO 2076 --- [           main] ationConfigEmbeddedWebApplicationContext : Closing org.springframework.boot

[email protected]6fc0559b: startup date [Fri Jun 09 15:07:29 CST 2017]; root of context hierarchy
2017-06-09 15:07:31.251  INFO 2076 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Unregistering JMX-exposed beans on shutdown

A：一個很簡單的問題，搞得自己很惆悵啊！後來發現是sonar指引我犯錯的！

如上所示，因為idea整合sonarLint的原因，SpringApplication.run這一行程式碼給我報紅了，因為沒有關閉流，我習慣性地安照sonar指引把流關了。然後啟動專案，發現始終訪問不到埠號，後來發現是sonar坑了我，自己把流關了還想訪問tomcat？……