Apache Tomcat version 5.5 implements the Servlet 2.4 and JavaServer Pages 2.0 specifications
Apache Tomcat version 6.0 implements the Servlet 2.5 and JavaServer Pages 2.1 specifications
Apache Tomcat version 7.0 implements the Servlet 3.0 and JavaServer Pages 2.2 specifications

如果某jar包的META-INF目錄下存在對(duì)應(yīng)的tld文件,那么對(duì)于JSP1.2+的web 容器,
若把此jar包放在WEB-INF/lib目錄下,可以直接引用標(biāo)簽,
不用再web.xml里面配置taglib;
Gavin