Tomcat 9 解決“At least one JAR was scanned for TLDs yet contained no TLDs”問題（親測可行）

1）編輯 {CATALINA-HOME}/conf/logging.properties 文件，在文件末尾添加：

org.apache.jasper.servlet.TldScanner.level = FINE

2）（最好先刪除 {CATALINA-HOME}/work 下的所有內容）重啓 Tomcat