idea启动springBoot报错:org.apache.catalina.LifecycleException: Protocol handler start failed

org.apache.catalina.LifecycleException: Protocol handler start failed
	at org.apache.catalina.connector.Connector.startInternal(Connector.java:1066) ~[tomcat-embed-core-9.0.34.jar:9.0.34]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) ~[tomcat-embed-core-9.0.34.jar:9.0.34]
	at org.apache.catalina.core.StandardService.addConnector(StandardService.java:227) [tomcat-embed-core-9.0.34.jar:9.0.34]
	at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.addPreviouslyRemovedConnectors(TomcatWebServer.java:263) [spring-boot-2.1.14.RELEASE.jar:2.1.14.RELEASE]
	at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.start(TomcatWebServer.java:195) [spring-boot-2.1.14.RELEASE.jar:2.1.14.RELEASE]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.startWebServer(ServletWebServerApplicationContext.java:297) [spring-boot-2.1.14.RELEASE.jar:2.1.14.RELEASE]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:163) [spring-boot-2.1.14.RELEASE.jar:2.1.14.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:552) [spring-context-5.1.15.RELEASE.jar:5.1.15.RELEASE]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) [spring-boot-2.1.14.RELEASE.jar:2.1.14.RELEASE]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:744) [spring-boot-2.1.14.RELEASE.jar:2.1.14.RELEASE]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:391) [spring-boot-2.1.14.RELEASE.jar:2.1.14.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:312) [spring-boot-2.1.14.RELEASE.jar:2.1.14.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.1.14.RELEASE.jar:2.1.14.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1204) [spring-boot-2.1.14.RELEASE.jar:2.1.14.RELEASE]
	at com.xdgy.gpo.GpoDevApplication.main(GpoDevApplication.java:13) [classes/:na]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_202]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_202]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_202]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_202]
	at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-2.1.14.RELEASE.jar:2.1.14.RELEASE]
Caused by: java.net.BindException: Address already in use: bind
	at sun.nio.ch.Net.bind0(Native Method) ~[na:1.8.0_202]
	at sun.nio.ch.Net.bind(Net.java:433) ~[na:1.8.0_202]
	at sun.nio.ch.Net.bind(Net.java:425) ~[na:1.8.0_202]
	at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:223) ~[na:1.8.0_202]
	at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74) ~[na:1.8.0_202]
	at org.apache.tomcat.util.net.NioEndpoint.initServerSocket(NioEndpoint.java:228) ~[tomcat-embed-core-9.0.34.jar:9.0.34]
	at org.apache.tomcat.util.net.NioEndpoint.bind(NioEndpoint.java:211) ~[tomcat-embed-core-9.0.34.jar:9.0.34]
	at org.apache.tomcat.util.net.AbstractEndpoint.bindWithCleanup(AbstractEndpoint.java:1141) ~[tomcat-embed-core-9.0.34.jar:9.0.34]
	at org.apache.tomcat.util.net.AbstractEndpoint.start(AbstractEndpoint.java:1227) ~[tomcat-embed-core-9.0.34.jar:9.0.34]
	at org.apache.coyote.AbstractProtocol.start(AbstractProtocol.java:592) ~[tomcat-embed-core-9.0.34.jar:9.0.34]
	at org.apache.catalina.connector.Connector.startInternal(Connector.java:1063) ~[tomcat-embed-core-9.0.34.jar:9.0.34]
	... 19 common frames omitted

2020-06-11 18:53:12.937  INFO 6644 --- [  restartedMain] o.apache.catalina.core.StandardService   : Stopping service [Tomcat]
2020-06-11 18:53:12.979  INFO 6644 --- [  restartedMain] ConditionEvaluationReportLoggingListener : 

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2020-06-11 18:53:12.984 ERROR 6644 --- [  restartedMain] o.s.b.d.LoggingFailureAnalysisReporter   : 

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

Description:

The Tomcat connector configured to listen on port 8099 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 8099, or configure this application to listen on another port.

2020-06-11 18:53:12.988  INFO 6644 --- [  restartedMain] o.s.s.concurrent.ThreadPoolTaskExecutor  : Shutting down ExecutorService 'applicationTaskExecutor'

Process finished with exit code 1

原因是:端口号被占用

解决办法:

1:打开cmd窗口,查询出端口号所对应的PID
   netstat -aon|findstr "端口号"

2:在任务管理器中找出PID对应的进程,结束进程,或者改变端口号