啟動tomcat時報如下異常：

Caused by: java.lang.IllegalArgumentException: The main resource set specified [C:\MyApp\apache-tomcat-9.0.29\wtpwebapps\jerryjsp] is not validat org.apache.catalina.webresources.StandardRoot.createMainResourceSet(StandardRoot.java:752)at org.apache.catalina.webresources.StandardRoot.startInternal(StandardRoot.java:709)at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)... 30 more

查看Servers文件夾下面的server.xml:

C:\Users\i042416\eclipse-workspace\Servers\Tomcat v9.0 Server at localhost-config\server.xml

發現里面指向了一個無效的jsp應用：

手動刪除server.xml文件里的Context節點，問題解決。服務器又可以啟動了：

把jsp應用的war包放到tomcat文件夾下的webapps里，會自動解壓進行部署：

Jul 20, 2020 10:57:21 AM org.apache.catalina.startup.HostConfig deployWAR INFO: Deploying web application archive [C:\MyApp\apache-tomcat-9.0.29\webapps\jerryjsp.war] Jul 20, 2020 10:57:22 AM org.apache.jasper.servlet.TldScanner scanJars INFO: 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. Jul 20, 2020 10:57:22 AM org.apache.catalina.startup.HostConfig deployWAR INFO: Deployment of web application archive [C:\MyApp\apache-tomcat-9.0.29\webapps\jerryjsp.war] has finished in [1,579] ms

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