SpringBoot报错 org.apache.catalina.LifecycleException: Protocol handler start failed

很多人在第一次创建运行SpringBoot项目的时候会报错 org.apache.catalina.LifecycleException: Protocol handler start failed

那么如何解决这？

这是端口8080被占用出现的报错，我们只需修改对应的端口号就可以了。

方法一：重启电脑（是最简单的方法）
方法二：修改端口号

错误如下所示

 .   ____          _            __ _ _/\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \\\/  ___)| |_)| | | | | || (_| |  ) ) ) )'  |____| .__|_| |_|_| |_\__, | / / / /=========|_|==============|___/=/_/_/_/:: Spring Boot ::  (v2.2.0.BUILD-SNAPSHOT)
2019-02-23 18:45:02.990  INFO 17804 --- [           main] com.youshang520i.HelloWordApplication    : Starting HelloWordApplication on RR091W14Y49BH73 with PID 17804 (F:\WorkSpoces\newStart\helloWord\target\classes started by Administrator in F:\WorkSpoces\newStart\helloWord)
2019-02-23 18:45:02.993  INFO 17804 --- [           main] com.youshang520i.HelloWordApplication    : No active profile set, falling back to default profiles: default
2019-02-23 18:45:04.056  INFO 17804 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
2019-02-23 18:45:04.082  INFO 17804 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2019-02-23 18:45:04.083  INFO 17804 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.16]
2019-02-23 18:45:04.089  INFO 17804 --- [           main] o.a.catalina.core.AprLifecycleListener   : The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: [C:\Program Files\Java\jdk1.8.0_121\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:/Program Files/Java/jdk1.8.0_121/bin/../jre/bin/server;C:/Program Files/Java/jdk1.8.0_121/bin/../jre/bin;C:/Program Files/Java/jdk1.8.0_121/bin/../jre/lib/amd64;C:\Program Files\Java\jdk1.8.0_121/bin;C:\Program Files\Java\jdk1.8.0_121/jre/bin;C:\ProgramData\Oracle\Java\javapath;C:\appAnZhuang\Oracle\product\11.2.0\dbhome_1\bin;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\.:C:\Program Files\Java\jdk1.8.0_121\lib;C:\Program Files\Java\jdk1.8.0_121\jre\bin;C:\Program Files (x86)\MySQL\MySQL Server 5.0\bin;C:\Program Files\TortoiseSVN\bin;C:\appAnZhuang\VisualSVN Server\SVNServer\bin;C:\appAnZhuang\MySQL\mysql-5.7.20-winx64\bin;D:\Plug\Maven\apache-maven-3.5.4\bin;C:\appAnZhuang\Python\Scripts;C:\appAnZhuang\Python\pip.exe;C:\appAnZhuang\Git\cmd;C:\Users\Administrator\AppData\Local\Microsoft\WindowsApps;C:\appAnZhuang\MicrosoftVSCode\bin;C:\appAnZhuang\Python;C:\appAnZhuang\MySQL\mysql-5.7.20-winx64\bin;C:\appAnZhuang\eclipse\eclipse;;.]
2019-02-23 18:45:04.189  INFO 17804 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2019-02-23 18:45:04.189  INFO 17804 --- [           main] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 1150 ms
2019-02-23 18:45:04.403  INFO 17804 --- [           main] o.s.s.concurrent.ThreadPoolTaskExecutor  : Initializing ExecutorService 'applicationTaskExecutor'
2019-02-23 18:45:04.556 ERROR 17804 --- [           main] org.apache.catalina.util.LifecycleBase   : Failed to start component [Connector[HTTP/1.1-8080]]
org.apache.catalina.LifecycleException: Protocol handler start failedat org.apache.catalina.connector.Connector.startInternal(Connector.java:1008) ~[tomcat-embed-core-9.0.16.jar:9.0.16]at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) ~[tomcat-embed-core-9.0.16.jar:9.0.16]at org.apache.catalina.core.StandardService.addConnector(StandardService.java:226) [tomcat-embed-core-9.0.16.jar:9.0.16]at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.addPreviouslyRemovedConnectors(TomcatWebServer.java:259) [spring-boot-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.start(TomcatWebServer.java:197) [spring-boot-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.startWebServer(ServletWebServerApplicationContext.java:311) [spring-boot-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:164) [spring-boot-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:552) [spring-context-5.1.5.RELEASE.jar:5.1.5.RELEASE]at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142) [spring-boot-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:785) [spring-boot-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:407) [spring-boot-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]at org.springframework.boot.SpringApplication.run(SpringApplication.java:322) [spring-boot-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]at org.springframework.boot.SpringApplication.run(SpringApplication.java:1278) [spring-boot-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]at org.springframework.boot.SpringApplication.run(SpringApplication.java:1266) [spring-boot-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]at com.youshang520i.HelloWordApplication.main(HelloWordApplication.java:10) [classes/:na]
Caused by: java.net.BindException: Address already in use: bindat 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.initServerSocket(NioEndpoint.java:236) ~[tomcat-embed-core-9.0.16.jar:9.0.16]at org.apache.tomcat.util.net.NioEndpoint.bind(NioEndpoint.java:210) ~[tomcat-embed-core-9.0.16.jar:9.0.16]at org.apache.tomcat.util.net.AbstractEndpoint.bindWithCleanup(AbstractEndpoint.java:1085) ~[tomcat-embed-core-9.0.16.jar:9.0.16]at org.apache.tomcat.util.net.AbstractEndpoint.start(AbstractEndpoint.java:1171) ~[tomcat-embed-core-9.0.16.jar:9.0.16]at org.apache.coyote.AbstractProtocol.start(AbstractProtocol.java:568) ~[tomcat-embed-core-9.0.16.jar:9.0.16]at org.apache.catalina.connector.Connector.startInternal(Connector.java:1005) ~[tomcat-embed-core-9.0.16.jar:9.0.16]... 14 common frames omitted
2019-02-23 18:45:04.561  INFO 17804 --- [           main] o.apache.catalina.core.StandardService   : Stopping service [Tomcat]
2019-02-23 18:45:04.572  INFO 17804 --- [           main] ConditionEvaluationReportLoggingListener :
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2019-02-23 18:45:04.575 ERROR 17804 --- [           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.
2019-02-23 18:45:04.578  INFO 17804 --- [           main] o.s.s.concurrent.ThreadPoolTaskExecutor  : Shutting down ExecutorService 'applicationTaskExecutor'

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