<C: choose>, <c: when>, <c: otherwise> tag
<C: choose> tag and function Java switch statement as to make a choice in a number of options.
switch statement has a case, but <c: choose> tag has a corresponding <c: when>, switch statement with a default, and <c: choose> tag in <c: otherwise>.
Syntax
<c:choose>
<c:when test="<boolean>"/>
...
</c:when>
<c:when test="<boolean>"/>
...
</c:when>
...
...
<c:otherwise>
...
</c:otherwise>
</c:choose>
Attributes
- <C: choose> tag has no attributes.
- <C: when> tag has only one attribute, have given in the following table.
- <C: otherwise> tag has no attributes.
| Attributes | description | If necessary | Defaults |
|---|---|---|---|
| test | condition | Yes | no |
Examples Demo
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<html>
<head>
<title>c:choose 标签实例</title>
</head>
<body>
<c:set var="salary" scope="session" value="${2000*2}"/>
<p>你的工资为 : <c:out value="${salary}"/></p>
<c:choose>
<c:when test="${salary <= 0}">
太惨了。
</c:when>
<c:when test="${salary > 1000}">
不错的薪水，还能生活。
</c:when>
<c:otherwise>
什么都没有。
</c:otherwise>
</c:choose>
</body>
</html>
Results are as follows:
你的工资为 : 4000 不错的薪水，还能生活。