JSTL是一个不断完善的开放源代码的JSP标签库，是由apache的jakarta小组来维护的。JSTL只能运行在支持JSP1.2和Servlet2.3规范的容器上，如tomcat 4.x。但是在即将推出的JSP 2.0中是作为标准支持的。-JSTL is a continuous improvement of the open-source JSP tag library, are from the jakarta group apache to maintain. JSTL can only run in support of JSP1.2 and norms Servlet2.3 containers, such as tomcat 4.x. However, in the upcoming JSP 2.0 is supported as a standard.