Javaweb Basic (_el) Library of functions

Introduction of the El Function library

Because the displayed string is often required to be processed when displaying data in a JSP page, the Sun company PIN defines a set of El Libraries for developers to use for some common processing.
These El functions are described in the Jstl development package, so using the Sun Company's El Library in a JSP page requires importing the JSTL development package and importing the El function library into the page as follows:

MyEclipse comes with the JSTL Development Kit:

　　

Fn.tld is the corresponding TLD description file for the El function library, as shown in:

　　
El functions defined in the page using Jstl:<% @taglib uri= "http://java.sun.com/jsp/jstl/functions" prefix= "FN"%>

Example of use of the El function

  1 <%@ page language= "java" import= "java.util.*" pageencoding= "UTF-8"%> 2 <% @page import= "Me.gacl.domain.User" %> 3 <%--introduced El Library--%> 4 <% @taglib uri= "http://java.sun.com/jsp/jstl/functions" prefix= "FN"%> 5 <!    DOCTYPE html> 6 
The code for the Me.gacl.domain.User class used in the JSP page is as follows:
1 package me.gacl.domain; 2  3 public class User {4      5     /** 6      * Hobbies 7 */      8     private string likes[]; 9     public     string [] Getlikes () {One         return likes;12     }13, public     void Setlikes (string[] likes) {This.likes         = Likes ;     }17}
The results of the operation are as follows:
　　
Javaweb Basic (_el) Library of functions