JSP 标准标记库（JSP Standard Tag Library，JSTL）是一个实现 Web 应用程序中常见的通用功能的定制标记库集，这些功能包括迭代和条件判断、数据管理格式化、XML 操作以及数据库访问,JSP Standard Tag Library (JSP Standard Tag Library, JSTL) is a Web application to achieve a common feature common custom tag library collection, these features determine the terms and conditions, including iterative, data management format, XML and database access operations