<X: choose>, <x: when>, <x: otherwise> tag
<X: choose> tag and the Java switch statement has the same functionality. switch statement has case statements, and <x: choose> tag has a <x: when> tag. switch statement has default statement, and <x: choose> tag has a <x: otherwise> tag.
Syntax
<x:choose>
<x:when select="<string>">
...
</x:when>
<x:when select="<string>">
...
</x:when>
...
...
<x:otherwise>
...
</x:otherwise>
</x:choose>Attributes
- <X: choose> has no properties.
- <X: when> attribute in the table below.
- <X: otherwise> has no properties.
<X: when> tag attributes:
| Attributes | description | If necessary | Defaults |
|---|---|---|---|
| select | condition | Yes | no |
Examples Demo
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="x" uri="http://java.sun.com/jsp/jstl/xml" %>
<html>
<head>
<title>JSTL x:choose 标签</title>
</head>
<body>
<h3>Books Info:</h3>
<c:set var="xmltext">
<books>
<book>
<name>Padam History</name>
<author>ZARA</author>
<price>100</price>
</book>
<book>
<name>Great Mistry</name>
<author>NUHA</author>
<price>2000</price>
</book>
</books>
</c:set>
<x:parse xml="${xmltext}" var="output"/>
<x:choose>
<x:when select="$output//book/author = 'ZARA'">
Book is written by ZARA
</x:when>
<x:when select="$output//book/author = 'NUHA'">
Book is written by NUHA
</x:when>
<x:otherwise>
Unknown author.
</x:otherwise>
</x:choose>
</body>
</html>
Results are as follows:
BOOKS INFO: Book is written by ZARA