jstl
导入
<%@ taglib uri="http://java.sun.com/jstl/core" prefix="c"%> <body> <c:out value="This is my test tag"/> </body>
具体使用：
<%@page import="java.util.ArrayList"%> <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ page isELIgnored="false"%> <%@taglib uri="http://java.sun.com/jstl/core_rt" prefix="c"%> <!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> <c:set value="amaker" var="name" scope="request"/> <c:out value="${name }"/> <hr> <!-- 使用javabean --> <jsp:useBean id="per" class="bean.Person"/> <c:set target="${per }" property="name" value="tom"/> <c:set target="${per }" property="age" value="20"/> <c:out value="${per.name }"/> <c:out value="${per.age }"/> <c:if test="${per.age<30 }"> 年龄太小,拒绝访问 </c:if> <hr> <c:set value="admin" var="username" scope="session"/> <c:if test="${username=='admin' }"> <input type="button" value="Delete"/> </c:if> <c:if test="${username!='admin' }"> <input type="button" value="Delete" disabled="disabled"/> </c:if> <hr> <c:set var="score" value="90" scope="request"/> <c:choose> <c:when test="${score>=90 }">优秀</c:when> <c:when test="${score<90 }">良好</c:when> </c:choose> <hr> <c:forEach var="i" begin="1" end="5"> <c:out value="${i }"/> </c:forEach> <hr> <% ArrayList list = new ArrayList(); list.add("a"); list.add("b"); request.setAttribute("List", list); %> <c:forEach var="i" items="${List }"> <c:out value="${i }"/> </c:forEach> </body> </html>
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