I. JSTL Introduction JSP Standard Tag Standard Tag Library (JSTL) is a custom tag library set that implements commonly used in web applications, including iterative and conditional judgment, data management formatting, XML operation, and database access. JSTL 1.0 has four custom tags: Core, Format, XML, and SQL. 1.core tag library provides custom operations, which limits the variable management data of the scope, and the iterations and conditional operations of the page content. The 2.Format tag library defines the operations used to format data (especially numbers and dates). It also supports internationalization of JSP pages using localized resource bundles. The 3.xml library contains some tags that are used to operate data represented by XML. 4. SQL library defines the operations used to query the relational database. Original source: http://blog.9cbs.net/hitgnu/archive/2004/10/31/161210.aspx
