SpringBoot报错（一）端口被占用Address already in use: bind

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本文记录了作者首次配置Spring Boot应用时遇到的端口冲突问题及解决方案。问题源于默认端口8080被占用，通过修改application配置文件中的server.port属性为8888成功解决了该问题。
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今天第一次配置springboot就出现一个粗心的错误，虽然我知道怎么解决，但出错，想着就不是很舒服。

这个问题的原因是端口被占用，解决方法就是修改Application里边的配置，修改调端口号

在application里边加入server.port=8888
  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v1.5.7.RELEASE)

2017-09-19 14:03:31.172  INFO 9924 --- [           main] c.m.myfamily.MyfamilyApplication         : Starting MyfamilyApplication on Jiunn with PID 9924 (E:\WJ\springboot\myfamily\target\classes started by jiunn in E:\WJ\springboot\myfamily)
2017-09-19 14:03:31.174  INFO 9924 --- [           main] c.m.myfamily.MyfamilyApplication         : No active profile set, falling back to default profiles: default
2017-09-19 14:03:31.223  INFO 9924 --- [           main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@2928854b: startup date [Tue Sep 19 14:03:31 CST 2017]; root of context hierarchy
2017-09-19 14:03:32.077  INFO 9924 --- [           main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)
2017-09-19 14:03:32.086  INFO 9924 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2017-09-19 14:03:32.086  INFO 9924 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/8.5.20
2017-09-19 14:03:32.142  INFO 9924 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2017-09-19 14:03:32.143  INFO 9924 --- [ost-startStop-1] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 924 ms
2017-09-19 14:03:32.223  INFO 9924 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean  : Mapping servlet: 'dispatcherServlet' to [/]
2017-09-19 14:03:32.226  INFO 9924 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'characterEncodingFilter' to: [/*]
2017-09-19 14:03:32.226  INFO 9924 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2017-09-19 14:03:32.226  INFO 9924 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2017-09-19 14:03:32.226  INFO 9924 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'requestContextFilter' to: [/*]
2017-09-19 14:03:32.403  INFO 9924 --- [           main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@2928854b: startup date [Tue Sep 19 14:03:31 CST 2017]; root of context hierarchy
2017-09-19 14:03:32.436  INFO 9924 --- [           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.servlet.http.HttpServletRequest)
2017-09-19 14:03:32.437  INFO 9924 --- [           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.HttpServletRequest,javax.servlet.http.HttpServletResponse)
2017-09-19 14:03:32.453  INFO 9924 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017-09-19 14:03:32.453  INFO 9924 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017-09-19 14:03:32.473  INFO 9924 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017-09-19 14:03:32.567  INFO 9924 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Registering beans for JMX exposure on startup
2017-09-19 14:03:32.588 ERROR 9924 --- [           main] o.a.coyote.http11.Http11NioProtocol      : Failed to start end point associated with ProtocolHandler ["http-nio-8080"]

java.net.BindException: Address already in use: bind
	at sun.nio.ch.Net.bind0(Native Method) ~[na:1.8.0_121]
	at sun.nio.ch.Net.bind(Net.java:433) ~[na:1.8.0_121]
	at sun.nio.ch.Net.bind(Net.java:425) ~[na:1.8.0_121]
	at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:223) ~[na:1.8.0_121]
	at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74) ~[na:1.8.0_121]
	at org.apache.tomcat.util.net.NioEndpoint.bind(NioEndpoint.java:210) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
	at org.apache.tomcat.util.net.AbstractEndpoint.start(AbstractEndpoint.java:990) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
	at org.apache.coyote.AbstractProtocol.start(AbstractProtocol.java:635) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
	at org.apache.catalina.connector.Connector.startInternal(Connector.java:1022) [tomcat-embed-core-8.5.20.jar:8.5.20]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) [tomcat-embed-core-8.5.20.jar:8.5.20]
	at org.apache.catalina.core.StandardService.addConnector(StandardService.java:225) [tomcat-embed-core-8.5.20.jar:8.5.20]
	at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.addPreviouslyRemovedConnectors(TomcatEmbeddedServletContainer.java:250) [spring-boot-1.5.7.RELEASE.jar:1.5.7.RELEASE]
	at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.start(TomcatEmbeddedServletContainer.java:193) [spring-boot-1.5.7.RELEASE.jar:1.5.7.RELEASE]
	at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.startEmbeddedServletContainer(EmbeddedWebApplicationContext.java:297) [spring-boot-1.5.7.RELEASE.jar:1.5.7.RELEASE]
	at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.finishRefresh(EmbeddedWebApplicationContext.java:145) [spring-boot-1.5.7.RELEASE.jar:1.5.7.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:546) [spring-context-4.3.11.RELEASE.jar:4.3.11.RELEASE]
	at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) [spring-boot-1.5.7.RELEASE.jar:1.5.7.RELEASE]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693) [spring-boot-1.5.7.RELEASE.jar:1.5.7.RELEASE]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360) [spring-boot-1.5.7.RELEASE.jar:1.5.7.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) [spring-boot-1.5.7.RELEASE.jar:1.5.7.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118) [spring-boot-1.5.7.RELEASE.jar:1.5.7.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107) [spring-boot-1.5.7.RELEASE.jar:1.5.7.RELEASE]
	at cn.myfamilyt.myfamily.MyfamilyApplication.main(MyfamilyApplication.java:12) [classes/:na]

2017-09-19 14:03:32.588 ERROR 9924 --- [           main] o.apache.catalina.core.StandardService   : Failed to start connector [Connector[HTTP/1.1-8080]]

org.apache.catalina.LifecycleException: Failed to start component [Connector[HTTP/1.1-8080]]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
	at org.apache.catalina.core.StandardService.addConnector(StandardService.java:225) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
	at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.addPreviouslyRemovedConnectors(TomcatEmbeddedServletContainer.java:250) [spring-boot-1.5.7.RELEASE.jar:1.5.7.RELEASE]
	at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.start(TomcatEmbeddedServletContainer.java:193) [spring-boot-1.5.7.RELEASE.jar:1.5.7.RELEASE]
	at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.startEmbeddedServletContainer(EmbeddedWebApplicationContext.java:297) [spring-boot-1.5.7.RELEASE.jar:1.5.7.RELEASE]
	at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.finishRefresh(EmbeddedWebApplicationContext.java:145) [spring-boot-1.5.7.RELEASE.jar:1.5.7.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:546) [spring-context-4.3.11.RELEASE.jar:4.3.11.RELEASE]
	at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) [spring-boot-1.5.7.RELEASE.jar:1.5.7.RELEASE]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693) [spring-boot-1.5.7.RELEASE.jar:1.5.7.RELEASE]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360) [spring-boot-1.5.7.RELEASE.jar:1.5.7.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) [spring-boot-1.5.7.RELEASE.jar:1.5.7.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118) [spring-boot-1.5.7.RELEASE.jar:1.5.7.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107) [spring-boot-1.5.7.RELEASE.jar:1.5.7.RELEASE]
	at cn.myfamilyt.myfamily.MyfamilyApplication.main(MyfamilyApplication.java:12) [classes/:na]
Caused by: org.apache.catalina.LifecycleException: service.getName(): "Tomcat";  Protocol handler start failed
	at org.apache.catalina.connector.Connector.startInternal(Connector.java:1029) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
	... 13 common frames omitted
Caused by: java.net.BindException: Address already in use: bind
	at sun.nio.ch.Net.bind0(Native Method) ~[na:1.8.0_121]
	at sun.nio.ch.Net.bind(Net.java:433) ~[na:1.8.0_121]
	at sun.nio.ch.Net.bind(Net.java:425) ~[na:1.8.0_121]
	at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:223) ~[na:1.8.0_121]
	at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74) ~[na:1.8.0_121]
	at org.apache.tomcat.util.net.NioEndpoint.bind(NioEndpoint.java:210) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
	at org.apache.tomcat.util.net.AbstractEndpoint.start(AbstractEndpoint.java:990) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
	at org.apache.coyote.AbstractProtocol.start(AbstractProtocol.java:635) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
	at org.apache.catalina.connector.Connector.startInternal(Connector.java:1022) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
	... 14 common frames omitted

2017-09-19 14:03:32.594  INFO 9924 --- [           main] o.apache.catalina.core.StandardService   : Stopping service [Tomcat]
2017-09-19 14:03:32.642  INFO 9924 --- [           main] utoConfigurationReportLoggingInitializer : 

Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2017-09-19 14:03:32.645 ERROR 9924 --- [           main] o.s.b.d.LoggingFailureAnalysisReporter   : 

***************************
APPLICATION FAILED TO START
***************************

Description:

The Tomcat connector configured to listen on port 8080 failed to start. The port may already be in use or the connector may be misconfigured.

Action:

Verify the connector's configuration, identify and stop any process that's listening on port 8080, or configure this application to listen on another port.

2017-09-19 14:03:32.649  INFO 9924 --- [           main] ationConfigEmbeddedWebApplicationContext : Closing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@2928854b: startup date [Tue Sep 19 14:03:31 CST 2017]; root of context hierarchy
2017-09-19 14:03:32.650  INFO 9924 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Unregistering JMX-exposed beans on shutdown

Process finished with exit code 1