Java开发的Web项目通常部署在Tomcat容器中，可将数据源配置于Tomcat内，由其统一管理。应用只需通过容器获取数据源，无需关心数据库具体配置，实现了配置与代码的分离，提升了灵活性与维护性。 1、 进入Tomcat安装目录下的conf文件夹，其中包含一个context.xml文件。

An embedded Tomcat server consists of a single Java web application along with a full Tomcat server distribution, packaged together and compressed into a single JAR, WAR or ZIP file. Embedded Tomcat ...

Like other Java enterprise tools, Tomcat has migrated from the original Java EE specification to Jakarta EE. Tomcat 9 and earlier were based on Java EE; Tomcat 10 and later are based on Jakarta EE.