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///
<!-- this must be added to the web application's web.xml -->
<taglib>
<taglib-uri>/java2s</taglib-uri>
<taglib-location>/WEB-INF/java2s.tld</taglib-location>
</taglib>
// create File:java2s.tld in the /WEB-INF/
<!DOCTYPE taglib
PUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.2//EN"
"http://java.sun.com/dtd/web-jsptaglibrary_1_2.dtd">
<!-- a tab library descriptor -->
<taglib xmlns="http://java.sun.com/JSP/TagLibraryDescriptor">
<tlib-version>1.0</tlib-version>
<jsp-version>1.2</jsp-version>
<short-name>Java2s Simple Tags</short-name>
<!-- Expression Language function -->
<function>
<name>ReverseString</name>
<function-class>com.java2s.ELFunctions</function-class>
<function-signature>String reverse(String)</function-signature>
</function>
<!-- end of Expression Language function -->
</taglib>
//compile the following code into WEB-INF\classes\com\java2s
package com.java2s;
public class ELFunctions
{
public static String reverse(String param)
{
return new StringBuffer(param).reverse().toString();
}
}
// start comcat and load the following jsp page in browser
<%@ taglib uri="/java2s" prefix="java2s" %>
<html>
<head>
<title>An Expression Language Tag</title>
</head>
<body>
output:
<h1>${java2s:ReverseString("Hello World from www.java2java.com!")}</h1>
</body>
</html>
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