<X: set> tag
<X: set> tag to set the value of a variable XPath expressions.
If the value of the XPath expression is boolean type, then <x: set> java.lang.Boolean will set a target, if the string, set a java.lang.String object, and if the figures, set a java.lang .Number object.
Syntax
<x:set var="<string>" select="<string>" scope="<string>"/>
Attributes
<X: set> tag has the following attributes:
| Attributes | description | If necessary | Defaults |
|---|---|---|---|
| var | On behalf of worthy variable XPath expression | Yes | Body |
| select | XPath expression to be calculated | no | no |
| scope | Scope var attribute | no | Page |
Examples Demo
The following example demonstrates how to use the <x: set> tag:
<%@ 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:set 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="${xmltext}" var="output"/>
<x:set var="fragment" select="$output//book"/>
<b>The price of the second book</b>:
<c:out value="${fragment}" />
</body>
</html>
Results are as follows:
BOOKS INFO: The price of the second book:[[book: null], [book: null]]