43、JSTL的choose标签

choose:相当于java代码的switch语句
1. 使用choose标签声明                     相当于switch声明
2. 使用when标签做判断                     相当于case
3. 使用otherwise标签做其他情况的声明        相当于default

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head><title>Title</title>
</head>
<body><%request.setAttribute("week1",1);request.setAttribute("week2",7);request.setAttribute("week3",10);%><h3>week1测试</h3><c:choose><c:when test="${week1 == 1}">${week1}为星期一</c:when><c:when test="${week1 == 2}">${week1}为星期二</c:when><c:when test="${week1 == 3}">${week1}为星期三</c:when><c:when test="${week1 == 4}">${week1}为星期四</c:when><c:when test="${week1 == 5}">${week1}为星期五</c:when><c:when test="${week1 == 6}">${week1}为星期六</c:when><c:when test="${week1 == 7}">${week1}为星期天</c:when><c:otherwise>${week1}输入有误</c:otherwise></c:choose><h3>week2测试</h3><c:choose><c:when test="${week2 == 1}">${week2}为星期一</c:when><c:when test="${week2 == 2}">${week2}为星期二</c:when><c:when test="${week2 == 3}">${week2}为星期三</c:when><c:when test="${week2 == 4}">${week2}为星期四</c:when><c:when test="${week2 == 5}">${week2}为星期五</c:when><c:when test="${week2 == 6}">${week2}为星期六</c:when><c:when test="${week2 == 7}">${week2}为星期天</c:when><c:otherwise>${week2}输入有误</c:otherwise></c:choose><h3>week3测试</h3><c:choose><c:when test="${week3 == 1}">${week3}为星期一</c:when><c:when test="${week3 == 2}">${week3}为星期二</c:when><c:when test="${week32 == 3}">${week3}为星期三</c:when><c:when test="${week3 == 4}">${week3}为星期四</c:when><c:when test="${week3 == 5}">${week3}为星期五</c:when><c:when test="${week3 == 6}">${week3}为星期六</c:when><c:when test="${week3 == 7}">${week3}为星期天</c:when><c:otherwise>${week3}输入有误</c:otherwise></c:choose>
</body>
</html>

输出：

week1测试

1为星期一

week2测试

7为星期天

week3测试

10输入有误

43、JSTL的choose标签相关推荐

jstl c:choose、c:when和c:otherwise标签
在用spring mvc中,页面前端老用jstl,记录一下. <c:choose>.<c:when>和<c:otherwise>在一起连用,可以实现Java语言中的 ...
jstl c:choose、c:when和c:otherwise标签的简单使用介绍
<c:choose>.<c:when>和<c:otherwise>在一起连用,可以实现Java语言中的if-else语句的功能.例如以下代码根据username请求 ...
[Jsp] 如何在JSP页面快速输出从Servlet接收的数据_看JSTL常用C标签的威力
JSTL的常用C标签 1)c:out 单值输出语法: <c:out value="" /> <c:out value=""></ ...
JSP中 JSTL和EL标签的使用
使用JSTL前的准备想要使用JSTL,首先需要给工程导入JSTL的包(JSTL.jar和standard.jar). JSTL简介 JSP标准标签库(JSTL)是一个JSP标签集合,它封装了JSP应 ...
web开发 jsp页面3 JSTL if choose/when/otherwise forEach
文章目录介绍JSTL的使用 if标签 choose/when/otherwise Foreach 介绍JSTL的使用 JSTL的使用 1. 下载jstl所需要的jar包 (standard.jar ...
JSTL（c标签）与Struts2（s标签）标签
引入jstl标签库项目导入standard.jar ,jstl.jar包在jsp页面加入如下句: <%@ taglib prefix="c" uri="http ...
MySQL中choose标签的用法
MySQL中标签的用法先给大家来个SQL语句: choose (when,otherwize) ,相当于java 语言中的 switch ,与 jstl 中的 choose 很类似. SELECT ...
mybatis choose标签的使用
有时候我们并不想应用所有的条件,而只是想从多个选项中选择一个.而使用if标签时,只要test中的表达式为 true,就会执行 if 标签中的条件.MyBatis 提供了 choose 元素.if标签是 ...
JSTL (JSP标准标签库)
JSTL的标签库 c标签(core标签库) fmt标签(国际化标签库) xml标签 sql标签 jstl函数库(EL函数) JSTL的使用 1.引入JSTL的jar包 2.新建jsp页面 3.在jsp ...

43、JSTL的choose标签

week1测试

week2测试

week3测试

43、JSTL的choose标签相关推荐

最新文章

热门文章