請看看有沒有web的起步依賴，或者是tomcat的依賴。
不要管有沒有傳遞依賴，請手動添加。
狀態：
"C:\Program Files\Java\jdk1.8.0_201\bin\java.exe" -XX:TieredStopAtLevel=1 -noverify -Dspring.output.ansi.enabled=always -Dcom.sun.management.jmxremote -Dspring.liveBeansView.mbeanDomain -Dspring.application.admin.enabled=true "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA 2018.3.5\lib\idea_rt.jar=64595:C:\Program Files\JetBrains\IntelliJ IDEA 2018.3.5\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\Java\jdk1.8.0_201\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\zipfs.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\jfxswt.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\rt.jar;D:\code\spring-already-studied\spring-chat\spring-security-login\target\classes;D:\mavenRepository\org\springframework\boot\spring-boot-starter-security\2.2.4.RELEASE\spring-boot-starter-security-2.2.4.RELEASE.jar;D:\mavenRepository\org\springframework\boot\spring-boot-starter\2.2.4.RELEASE\spring-boot-starter-2.2.4.RELEASE.jar;D:\mavenRepository\org\springframework\boot\spring-boot\2.2.4.RELEASE\spring-boot-2.2.4.RELEASE.jar;D:\mavenRepository\org\springframework\boot\spring-boot-autoconfigure\2.2.4.RELEASE\spring-boot-autoconfigure-2.2.4.RELEASE.jar;D:\mavenRepository\org\springframework\boot\spring-boot-starter-logging\2.2.4.RELEASE\spring-boot-starter-logging-2.2.4.RELEASE.jar;D:\mavenRepository\ch\qos\logback\logback-classic\1.2.3\logback-classic-1.2.3.jar;D:\mavenRepository\ch\qos\logback\logback-core\1.2.3\logback-core-1.2.3.jar;D:\mavenRepository\org\slf4j\slf4j-api\1.7.30\slf4j-api-1.7.30.jar;D:\mavenRepository\org\apache\logging\log4j\log4j-to-slf4j\2.12.1\log4j-to-slf4j-2.12.1.jar;D:\mavenRepository\org\apache\logging\log4j\log4j-api\2.12.1\log4j-api-2.12.1.jar;D:\mavenRepository\org\slf4j\jul-to-slf4j\1.7.30\jul-to-slf4j-1.7.30.jar;D:\mavenRepository\jakarta\annotation\jakarta.annotation-api\1.3.5\jakarta.annotation-api-1.3.5.jar;D:\mavenRepository\org\springframework\spring-core\5.2.3.RELEASE\spring-core-5.2.3.RELEASE.jar;D:\mavenRepository\org\springframework\spring-jcl\5.2.3.RELEASE\spring-jcl-5.2.3.RELEASE.jar;D:\mavenRepository\org\yaml\snakeyaml\1.25\snakeyaml-1.25.jar;D:\mavenRepository\org\springframework\spring-aop\5.2.3.RELEASE\spring-aop-5.2.3.RELEASE.jar;D:\mavenRepository\org\springframework\spring-beans\5.2.3.RELEASE\spring-beans-5.2.3.RELEASE.jar;D:\mavenRepository\org\springframework\security\spring-security-config\5.2.1.RELEASE\spring-security-config-5.2.1.RELEASE.jar;D:\mavenRepository\org\springframework\security\spring-security-core\5.2.1.RELEASE\spring-security-core-5.2.1.RELEASE.jar;D:\mavenRepository\org\springframework\spring-context\5.2.3.RELEASE\spring-context-5.2.3.RELEASE.jar;D:\mavenRepository\org\springframework\security\spring-security-web\5.2.1.RELEASE\spring-security-web-5.2.1.RELEASE.jar;D:\mavenRepository\org\springframework\spring-expression\5.2.3.RELEASE\spring-expression-5.2.3.RELEASE.jar;D:\mavenRepository\org\springframework\spring-web\5.2.3.RELEASE\spring-web-5.2.3.RELEASE.jar" com.a.chat.SpringBootChat . ____ _ __ _ _ /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \ ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \ \\/ ___)| |_)| | | | | || (_| | ) ) ) ) ' |____| .__|_| |_|_| |_\__, | / / / / =========|_|==============|___/=/_/_/_/ :: Spring Boot :: (v2.2.4.RELEASE) 2020-04-21 17:16:32.986 INFO 13444 --- [ main] com.a.chat.SpringBootChat : Starting SpringBootChat on W10ZJ-2020XTXNL with PID 13444 (D:\code\spring-already-studied\spring-chat\spring-security-login\target\classes started by Administrator in D:\code\spring-already-studied) 2020-04-21 17:16:32.989 INFO 13444 --- [ main] com.a.chat.SpringBootChat : No active profile set, falling back to default profiles: default 2020-04-21 17:16:33.508 INFO 13444 --- [ main] com.a.chat.SpringBootChat : Started SpringBootChat in 0.854 seconds (JVM running for 3.199) Process finished with exit code 0
就輸出一個Process finished with exit code 0，然后就自動關閉了。