run指令：启动后报以下错误：
Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:2.5.3:run (default-cli) on project springboot_2: Application finished with exit code: 1【无法在项目springboot_2:应用程序上执行目标org.springframework.boot:spring boot maven插件：2.5.3:run（默认cli），退出代码：1】
run执行代码：
"C:\Program Files\Java\jdk1.8.0_181\bin\java.exe" -Dmaven.multiModuleProjectDirectory=C:\IDEA_Project\springboot_2 -DarchetypeCatalog=internal "-Dmaven.home=C:\Program Files\apache-maven-3.6.3" "-Dclassworlds.conf=C:\Program Files\apache-maven-3.6.3\bin\m2.conf" "-Dmaven.ext.class.path=C:\Program Files\JetBrains\IntelliJ IDEA 2020.3\plugins\maven\lib\maven-event-listener.jar" "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA 2020.3\lib\idea_rt.jar=20404:C:\Program Files\JetBrains\IntelliJ IDEA 2020.3\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\apache-maven-3.6.3\boot\plexus-classworlds-2.6.0.jar;C:\Program Files\apache-maven-3.6.3\boot\plexus-classworlds.license" org.codehaus.classworlds.Launcher -Didea.version=2020.3 -s "C:\Program Files\apache-maven-3.6.3\conf\settings.xml" -Dmaven.repo.local=C:\Users\阿拉\.m2\repository org.springframework.boot:spring-boot-maven-plugin:2.5.3:run
[INFO] Scanning for projects...
[INFO]
[INFO] -----------------------< com.bdqn:springboot_2 >------------------------
[INFO] Building springboot_2 0.0.1-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] >>> spring-boot-maven-plugin:2.5.3:run (default-cli) > test-compile @ springboot_2 >>>
[INFO]
[INFO] --- maven-resources-plugin:3.2.0:resources (default-resources) @ springboot_2 ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Using 'UTF-8' encoding to copy filtered properties files.
[INFO] Copying 1 resource
[INFO] Copying 0 resource
[INFO]
[INFO] --- maven-compiler-plugin:3.8.1:compile (default-compile) @ springboot_2 ---
[INFO] Nothing to compile - all classes are up to date
[INFO]
[INFO] --- maven-resources-plugin:3.2.0:testResources (default-testResources) @ springboot_2 ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Using 'UTF-8' encoding to copy filtered properties files.
[INFO] skip non existing resourceDirectory C:\IDEA_Project\springboot_2\src\test\resources
[INFO]
[INFO] --- maven-compiler-plugin:3.8.1:testCompile (default-testCompile) @ springboot_2 ---
[INFO] Nothing to compile - all classes are up to date
[INFO]
[INFO] <<< spring-boot-maven-plugin:2.5.3:run (default-cli) < test-compile @ springboot_2 <<<
[INFO]
[INFO]
[INFO] --- spring-boot-maven-plugin:2.5.3:run (default-cli) @ springboot_2 ---
[INFO] Attaching agents: []
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.5.3)
2021-08-02 23:14:25.178 INFO 14424 --- [ main] com.bdqn.Springboot2Application : Starting Springboot2Application using Java 1.8.0_181 on LAPTOP-SVSAV6NH with PID 14424 (C:\IDEA_Project\springboot_2\target\classes started by ���� in C:\IDEA_Project\springboot_2)
2021-08-02 23:14:25.181 INFO 14424 --- [ main] com.bdqn.Springboot2Application : No active profile set, falling back to default profiles: default
2021-08-02 23:14:26.041 INFO 14424 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8081 (http)
2021-08-02 23:14:26.055 INFO 14424 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2021-08-02 23:14:26.056 INFO 14424 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.50]
2021-08-02 23:14:26.221 INFO 14424 --- [ main] org.apache.jasper.servlet.TldScanner : At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
2021-08-02 23:14:26.226 INFO 14424 --- [ main] o.a.c.c.C.[.[localhost].[/springboot_2] : Initializing Spring embedded WebApplicationContext
2021-08-02 23:14:26.226 INFO 14424 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 1012 ms
2021-08-02 23:14:26.419 INFO 14424 --- [ main] o.s.b.a.w.s.WelcomePageHandlerMapping : Adding welcome page template: index
2021-08-02 23:14:26.471 WARN 14424 --- [ main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.context.ApplicationContextException: Failed to start bean 'webServerStartStop'; nested exception is org.springframework.boot.web.server.PortInUseException: Port 8081 is already in use
2021-08-02 23:14:26.474 INFO 14424 --- [ main] o.apache.catalina.core.StandardService : Stopping service [Tomcat]
2021-08-02 23:14:26.491 INFO 14424 --- [ main] ConditionEvaluationReportLoggingListener :
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2021-08-02 23:14:26.500 ERROR 14424 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter :
***************************
APPLICATION FAILED TO START
***************************
Description:
Web server failed to start. Port 8081 was already in use.
Action:
Identify and stop the process that's listening on port 8081 or configure this application to listen on another port.
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 10.835 s
[INFO] Finished at: 2021-08-02T23:14:26+08:00
[INFO] ------------------------------------------------------------------------
**[ERROR] Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:2.5.3:run (default-cli) on project springboot_2: Application finished with exit code: 1 -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
进程已结束，退出代码为 1**
