<x:choose>标签与Java switch语句有相同的功能。switch语句有case语句,而<x:choose>标签有<x:when>标签。switch语句有default语句,而<x:choose>标签有<x:otherwise>标签。
<x:when>标签的属性:
属性 | 描述 | 是否必要 | 默认值 |
---|---|---|---|
select | 条件 | 是 | 无 |
- <%@ 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>
运行结果如下:
- BOOKS INFO:
- Book is written by ZARA