JSTL简单入门学习实例

Maven依赖:

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>

建立页面index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!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>首页</title>
</head>
<body>
c:set标签:<c:set var="varName" value="foo" scope="session"/><br>
c:out标签:<c:out value="${varName}" default="default value"/><br>
if标签:
<c:if test="${varName=='foo'}">
if输出
</c:if>
<br>
if-else标签:
<c:choose>
<c:when test="${empty param.username}">
no user
</c:when>
<c:when test="${1==1}">
invalid section
</c:when>
<c:otherwise>
otherwise
</c:otherwise>
</c:choose>
<br>
foreach标签:
<c:forEach var="i" begin="1" end="3">
item is: <c:out value="${i}"/>
</c:forEach>
<br>
c:forTokens标签:
<c:forTokens items="Zara,nuha,roshy" delims="," var="name">
   <c:out value="${name}"/>
</c:forTokens>
</body>
</html> 

页面输出:

c:set标签:
c:out标签:foo
if标签: if输出 
if-else标签: no user 
foreach标签: item is: 1 item is: 2 item is: 3 
c:forTokens标签: Zara nuha roshy

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