Apache Tomcat Configuration Reference - The Context Container
https://tomcat.apache.org/tomcat-5.5-doc/config/context.html
tomcat web.xml 配置详解 - titan_max的专栏 - ****博客
https://blog.****.net/titan_max/article/details/52462447
java - Deploy tomcat webapp with different web.xml - Stack Overflow
https://*.com/questions/37167283/deploy-tomcat-webapp-with-different-web-xml
web.xml Reference Guide for Tomcat - Metawerx Java Wiki
http://wiki.metawerx.net/wiki/Web.xml
tomcat简介之web.xml详解 - 云下的天空 - BlogJava
http://www.blogjava.net/liuwuping12064915/archive/2011/06/02/351614.html