69 lines
2.5 KiB
HTML
69 lines
2.5 KiB
HTML
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<html><body><pre>
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<!--
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions" %>
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<%@ taglib prefix="my" uri="http://jakarta.apache.org/tomcat/jsp2-example-taglib"%>
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<html>
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<head>
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<title>JSP 2.0 Expression Language - Functions</title>
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</head>
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<body>
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<h1>JSP 2.0 Expression Language - Functions</h1>
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<hr>
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An upgrade from the JSTL expression language, the JSP 2.0 EL also
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allows for simple function invocation. Functions are defined
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by tag libraries and are implemented by a Java programmer as
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static methods.
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<blockquote>
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<u><b>Change Parameter</b></u>
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<form action="functions.jsp" method="GET">
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foo = <input type="text" name="foo" value="${fn:escapeXml(param["foo"])}">
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<input type="submit">
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</form>
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<br>
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<code>
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<table border="1">
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<thead>
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<td><b>EL Expression</b></td>
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<td><b>Result</b></td>
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</thead>
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<tr>
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<td>\${param["foo"]}</td>
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<td>${fn:escapeXml(param["foo"])}&nbsp;</td>
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</tr>
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<tr>
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<td>\${my:reverse(param["foo"])}</td>
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<td>${my:reverse(fn:escapeXml(param["foo"]))}&nbsp;</td>
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</tr>
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<tr>
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<td>\${my:reverse(my:reverse(param["foo"]))}</td>
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<td>${my:reverse(my:reverse(fn:escapeXml(param["foo"])))}&nbsp;</td>
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</tr>
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<tr>
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<td>\${my:countVowels(param["foo"])}</td>
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<td>${my:countVowels(fn:escapeXml(param["foo"]))}&nbsp;</td>
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</tr>
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</table>
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</code>
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</blockquote>
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</body>
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</html>
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</pre></body></html>
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