code097.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>EL邏輯運算 <%request.setAttribute("userName", "tom");request.setAttribute("pwd", "123");%>userName = ${userName}
pwd = ${pwd}
/${userName !="" && (userName=="大王")}${userName !="" && (userName=="大王")}
/${userName == "tom" && pwd == "123"}${userName == "tom" && pwd == "123"}