本系列博客汇总在这里：EL 表达式和 JSTL 标签汇总
以上操作完整源码：
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Insert title here</title> </head> <body> <h1>EL表达式运算</h1> <label>常量输出：</label>${10 }<br> <label>四则运算：</label>${10+2 }, ${10-2 }, ${10*2 }, ${10/2 }, ${10 div 2 }<br> <label>等于：</label>${10==10 }, ${10 eq 10 }<br> <label>不等于：</label>${10 != 2 }, ${10 ne 2}<br> <label>取余数：</label>${10%3 }, ${10 mod 3 }<br> <label>小于：</label>${5 < 10 }, ${5 lt 10 }<br> <label>大于：</label>${5 > 10 }, ${5 gt 10 }<br> <label>小于等于：</label>${5 <= 10 }, ${5 le 10}<br> <label>大于等于：</label>${5 >= 3 }, ${5 ge 3 }<br> <label>逻辑与：</label>${true && true }, ${true and true }<br> <label>逻辑或：</label>${true || false }, ${true or false }<br> <label>逻辑非：</label>${!true } , ${not true }<br> <label>判空：</label>${empty "" }<br> <label>非空判断：</label>${empty not "" } </body> </html>如有错误，欢迎指正！
