很多人在第一次創(chuàng)建運行SpringBoot項目的時候會報錯 org.apache.catalina.LifecycleException: Protocol handler start failed

那么如何解決這？

這是端口8080被占用出現(xiàn)的報錯，我們只需修改對應(yīng)的端口號就可以了。

方法一：重啟電腦（是最簡單的方法）
方法二：修改端口號

錯誤如下所示

. ____ _ __ _ _/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \ ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \\\/ ___)| |_)| | | | | || (_| | ) ) ) )' |____| .__|_| |_|_| |_\__, | / / / /=========|_|==============|___/=/_/_/_/:: 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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