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Java Tutorial/JSTL/Choose - История изменений
2026-04-22T14:15:00Z
История изменений этой страницы в вики
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http://www.jexp.ru/index.php?title=Java_Tutorial/JSTL/Choose&diff=3420&oldid=prev
в 17:44, 31 мая 2010
2010-05-31T17:44:26Z
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<td colspan="1" style="background-color: white; color:black; text-align: center;">← Предыдущая</td>
<td colspan="1" style="background-color: white; color:black; text-align: center;">Версия 17:44, 31 мая 2010</td>
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http://www.jexp.ru/index.php?title=Java_Tutorial/JSTL/Choose&diff=3421&oldid=prev
Admin: 1 версия
2010-05-31T15:24:23Z
<p>1 версия</p>
<p><b>Новая страница</b></p><div>== Choose When and Otherwise ==<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="java"><br />
<%@ taglib uri="http://java.sun.ru/jstl/core" prefix="c" %><br />
<%@ taglib uri="http://java.sun.ru/jstl/core-rt" prefix="c-rt" %><br />
<html><br />
<head><br />
<title>Count to 10 Example(tracking even and odd)</title><br />
</head><br />
<body><br />
<table border="0"><br />
<c:forEach var="i" begin="1" end="10" varStatus="status"><br />
<jsp:useBean id="status" type="javax.servlet.jsp.jstl.core.LoopTagStatus" /><br />
<c-rt:choose><br />
<c-rt:when test="<%=status.getCount()%2==0%>"><br />
<c:set var="color" value="#eeeeee" /><br />
</c-rt:when><br />
<c-rt:otherwise><br />
<c:set var="color" value="#dddddd" /><br />
</c-rt:otherwise><br />
</c-rt:choose><br />
<tr><br />
<td width="200" bgcolor="<c:out value="${color}"/>"> <br />
<c:out value="${i}" /><br />
</td><br />
</tr><br />
</c:forEach><br />
</table><br />
</body><br />
</html></source><br />
<br />
<br />
<!-- end source code --><br />
<br />
<br />
<br />
<br />
<br />
<br />
== Choose When Statement ==<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="java"><br />
<%@ taglib uri="http://java.sun.ru/jstl/core" prefix="c" %><br />
<html><br />
<head><br />
<title>Using Choose,Otherwise and When</title><br />
</head><br />
<body><br />
<c:if test="${pageContext.request.method=="POST"}">You entered:<br />
<br />
<c:choose><br />
<c:when test="${param.enter=="1"}">One<br />
<br /><br />
</c:when><br />
<c:when test="${param.enter=="2"}">Two<br />
<br /><br />
</c:when><br />
<c:when test="${param.enter=="3"}">Three<br />
<br /><br />
</c:when><br />
<c:when test="${param.enter=="4"}">Four<br />
<br /><br />
</c:when><br />
<c:when test="${param.enter=="5"}">Five<br />
<br /><br />
</c:when><br />
<c:otherwise><br />
<c:out value="${param.enter}" /><br />
<br /><br />
</c:otherwise><br />
</c:choose><br />
</c:if><br />
<form method="post">Enter a number between 1 and 5:<br />
<input type="text" name="enter" /><br />
<input type="submit" value="Accept" /><br />
<br /><br />
</form><br />
</body><br />
</html></source><br />
<br />
<br />
<!-- end source code --><br />
<br />
<br />
<br />
<br />
<br />
<br />
== Choose XML Data with Comparision ==<br />
<br />
<br />
<br />
<br />
<p>JSTL code</p><br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="java"><br />
<%@ taglib uri="http://java.sun.ru/jstl/core" prefix="c" %><%@ taglib uri="http://java.sun.ru/jstl/xml" prefix="x" %><br />
<html><br />
<head><br />
<title>For Each Examples</title><br />
</head><br />
<body><br />
<c:import var="students" url="students.xml" /><br />
<x:parse var="doc" xml="${students}" /><br />
<table border="1"><br />
<tr><br />
<TH>First</th><br />
<TH>Last</th><br />
<TH>Points</th><br />
<TH>Letter</th><br />
<TH>Note</th><br />
</tr><br />
<x:forEach var="student" select="$doc/students/student"><br />
<tr><br />
<td><br />
<x:out select="name/first" /><br />
</td><br />
<td><br />
<x:out select="name/last" /><br />
</td><br />
<td><br />
<x:out select="grade/points" /><br />
</td><br />
<td><br />
<x:out select="grade/letter" /><br />
</td><br />
<td><br />
<x:choose><br />
<x:when select="grade/points>90">You did<br />
great!</x:when><br />
<x:when select="grade/points>80">You did<br />
good!</x:when><br />
<x:when select="grade/points>75">You did<br />
ok.</x:when><br />
<x:when select="grade/points>70">Well, you<br />
passed.</x:when><br />
<x:otherwise>You failed</x:otherwise><br />
</x:choose><br />
</td><br />
</tr><br />
</x:forEach><br />
</table><br />
</body><br />
</html></source><br />
<br />
<br />
<!-- end source code --><br />
<br />
<br />
<br />
<br />
<br />
<br />
== Combine If Chooser to Report Exception ==<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="java"><br />
<%@ taglib uri="http://java.sun.ru/jstl/core" prefix="c" %><br />
<%<br />
int i= (int) (Math.random() * 10);<br />
pageContext.setAttribute("signalStrength", new Integer(i), PageContext.PAGE_SCOPE);<br />
%><br />
<html><br />
<head><br />
<title>The c:catch action</title><br />
</head><br />
<body><br />
<c:if test="${pageScope.signalStrength < 5}"><br />
<c:set var="signalFailure" value="true" scope="page" /><br />
</c:if><br />
<c:choose><br />
<c:when test="${pageScope.signalFailure == true}"><br />
<h3>Exception!</h3><br />
Refresh the page in your web browser to try again.<br />
</c:when><br />
<c:otherwise><br />
<h3>No Exception.</h3><br />
Refresh the page in your web browser to make another call.<br />
</c:otherwise><br />
</c:choose><br />
</body><br />
</html></source><br />
<br />
<br />
<!-- end source code --><br />
<br />
<br />
<br />
<br />
<br />
<br />
== Tag Examples - choose ==<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="java"><br />
<!--<br />
Licensed to the Apache Software Foundation (ASF) under one or more<br />
contributor license agreements. See the NOTICE file distributed with<br />
this work for additional information regarding copyright ownership.<br />
The ASF licenses this file to You under the Apache License, Version 2.0<br />
(the "License"); you may not use this file except in compliance with<br />
the License. You may obtain a copy of the License at<br />
http://www.apache.org/licenses/LICENSE-2.0<br />
Unless required by applicable law or agreed to in writing, software<br />
distributed under the License is distributed on an "AS IS" BASIS,<br />
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<br />
See the License for the specific language governing permissions and<br />
limitations under the License.<br />
--><br />
<html><br />
<head><br />
<title>Tag Examples - choose</title><br />
</head><br />
<body><br />
<h1>Tag Plugin Examples - &lt;c:choose></h1><br />
<font color="#000000"/><br />
</br><br />
<%@ taglib uri="http://java.sun.ru/jstl/core" prefix="c" %><br />
<c:forEach var="index" begin="0" end="4"><br />
#<c:out value="${index}"/> : <br />
<c:choose><br />
<c:when test="${index == 1}"><br />
One!</br><br />
</c:when><br />
<c:when test="${index == 4}"><br />
Four!</br><br />
</c:when><br />
<c:when test="${index == 3}"><br />
Three!</br><br />
</c:when><br />
<c:otherwise><br />
Huh?</br><br />
</c:otherwise><br />
</c:choose><br />
</c:forEach><br />
</body><br />
</html></source><br />
<br />
<br />
<!-- end source code --></div>
Admin