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Java Tutorial/JSTL/Set - История изменений
2026-04-24T09:12:38Z
История изменений этой страницы в вики
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http://www.jexp.ru/index.php?title=Java_Tutorial/JSTL/Set&diff=3377&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/Set&diff=3378&oldid=prev
Admin: 1 версия
2010-05-31T15:23:17Z
<p>1 версия</p>
<p><b>Новая страница</b></p><div>== Do Calculation In Set ==<br />
<br />
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<br />
<!-- start source code --><br />
<br />
<source lang="java"><br />
<%@ taglib prefix="c" uri="http://java.sun.ru/jstl/core" %><br />
<%@ taglib prefix="fmt" uri="http://java.sun.ru/jstl/fmt" %><br />
<html><br />
<head><br />
<title>EL Expression Examples</title><br />
</head><br />
<body><br />
<h1>EL Expression Examples</h1><br />
<h2>Arithmetic Operators in Expressions</h2><br />
<c:set var="appleCount" value="${1 + 2 * 4 - 6 / 2}"/><br />
<br />
<c:out value="${appleCount}" /><br />
</body><br />
</html></source><br />
<br />
<br />
<!-- end source code --><br />
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== JSTL Set With Body ==<br />
<br />
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<br />
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<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>Set Examples</title><br />
</head><br />
<body><br />
<h3>Set With Body</h3><br />
<c:set var="str">Hello, Again World</c:set><br />
str = <br />
<c:out value="${str}" /><br />
<br /><br />
<br />
</body><br />
</html></source><br />
<br />
<br />
<!-- end source code --><br />
<br />
<br />
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<br />
== JSTL Set Without Body ==<br />
<br />
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<!-- start source code --><br />
<br />
<source lang="java"><br />
<%@ taglib uri="http://java.sun.ru/jstl/core" prefix="c" %><br />
<html><br />
<head><br />
<title>Set Examples</title><br />
</head><br />
<body><br />
<h3>Set With No Body</h3><br />
<c:set var="str" value="Hello World" /><br />
str = <br />
<c:out value="${str}" /><br />
<br /><br />
<br />
</body><br />
</html></source><br />
<br />
<br />
<!-- end source code --><br />
<br />
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<br />
<br />
<br />
<br />
== Remove Variable ==<br />
<br />
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<br />
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<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>Set Examples</title><br />
</head><br />
<body><br />
<h3>Remove Example</h3><br />
<c:set var="test" value="Hello World" scope="page" /><br />
The value in the variable test before remove is <br />
<c:out value="${test}" /><br />
<br /><br />
<c:remove var="test" scope="page" /><br />
The value in the variable test after remove is <br />
<c:out value="${test}" /><br />
<br /><br />
</body><br />
</html></source><br />
<br />
<br />
<!-- end source code --><br />
<br />
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<br />
<br />
<br />
<br />
== Set Comma Delimited String to Variable ==<br />
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<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 />
<c:set var="days" value="A,B,C,D,E,F,G" /><br />
<table border="0"><br />
<c:forEach var="i" items="${days}" varStatus="status"><br />
<jsp:useBean id="status"<br />
type="javax.servlet.jsp.jstl.core.LoopTagStatus" /><br />
<c-rt:choose><br />
<c-rt:when test="<%=status.getCount()%2==0%>"><br />
<c:set var="color" value="#cccccc" /><br />
</c-rt:when><br />
<c-rt:otherwise><br />
<c:set var="color" value="#dddddd" /><br />
</c-rt:otherwise><br />
</c-rt:choose><br />
<tr><br />
<td width="200" bgcolor="<c:out value="${color}"/>"> <br />
<c:out value="${i}" /><br />
</td><br />
</tr><br />
</c:forEach><br />
</table><br />
</body><br />
</html></source><br />
<br />
<br />
<!-- end source code --><br />
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<br />
== Set Value for Variable ==<br />
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<!-- start source code --><br />
<br />
<source lang="java"><br />
<%@ taglib uri="http://java.sun.ru/jstl/core" prefix="c" %><br />
<table border="1"><br />
<tr><br />
<TH>Scoped Variable</th><br />
<TH>Current Value</th><br />
</tr><br />
<tr><br />
<td><br />
<b>Page Scope</b><br />
(scopeVarPage)</td><br />
<td>&#160; <br />
<c:out value="${scopeVarPage}" /><br />
</td><br />
</tr><br />
<tr><br />
<td><br />
<b>Request Scope</b><br />
(scopeVarRequest)</td><br />
<td>&#160; <br />
<c:out value="${scopeVarRequest}" /><br />
</td><br />
</tr><br />
<tr><br />
<td><br />
<b>Session Scope</b><br />
(scopeVarSession)</td><br />
<td>&#160; <br />
<c:out value="${scopeVarSession}" /><br />
</td><br />
</tr><br />
<tr><br />
<td><br />
<b>Application Scope</b><br />
(applicationVarPage)</td><br />
<td>&#160; <br />
<c:out value="${scopeVarApplication}" /><br />
</td><br />
</tr><br />
</table></source><br />
<br />
<br />
<!-- end source code --><br />
<br />
<br />
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<br />
<br />
<br />
== Set Variable as Session Scope ==<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="java"><br />
<%@ taglib prefix="c" uri="http://java.sun.ru/jstl/core" %><br />
<html><br />
<body><br />
This JSP stores the ultimate answer in a session-scoped variable where<br />
the other JSPs in the web application can access it.<br />
<p /><br />
<c:set var="theUltimateAnswer" value="${41+1}" scope="session" /><br />
Click <br />
<br />
<br />
<br />
== Set Variable Scope Page ==<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>Set in Scope Examples</title><br />
</head><br />
<body><br />
<c:set var="test" value="Page Level Value" scope="page" /><br />
<table border="1"><br />
<tr><br />
<td><br />
<b>Default Level</b><br />
</td><br />
<td><br />
<c:out value="${test}" /><br />
</td><br />
</tr><br />
<tr><br />
<td><br />
<b>Page Level</b><br />
</td><br />
<td><br />
<c:out value="${pageScope.test}" /><br />
</td><br />
</tr><br />
<tr><br />
<td><br />
<b>Request Level</b><br />
</td><br />
<td><br />
<c:out value="${requestScope.test}" /><br />
</td><br />
</tr><br />
<tr><br />
<td><br />
<b>Session Level</b><br />
</td><br />
<td><br />
<c:out value="${sessionScope.test}" /><br />
</td><br />
</tr><br />
<tr><br />
<td><br />
<b>Application Level</b><br />
</td><br />
<td><br />
<c:out value="${applicationScope.test}" /><br />
</td><br />
</tr><br />
</table><br />
</body><br />
</html></source><br />
<br />
<br />
<!-- end source code --><br />
<br />
<br />
<br />
<br />
<br />
<br />
== Set Variable Scope to Application ==<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="java"><br />
<%@ taglib uri="http://java.sun.ru/jstl/core" prefix="c" %><br />
<html><br />
<head><br />
<title>Set in Scope Examples</title><br />
</head><br />
<body><br />
<c:set var="test" value="Application Level Value" scope="application" /><br />
<table border="1"><br />
<tr><br />
<td><br />
<b>Default Level</b><br />
</td><br />
<td><br />
<c:out value="${test}" /><br />
</td><br />
</tr><br />
<tr><br />
<td><br />
<b>Page Level</b><br />
</td><br />
<td><br />
<c:out value="${pageScope.test}" /><br />
</td><br />
</tr><br />
<tr><br />
<td><br />
<b>Request Level</b><br />
</td><br />
<td><br />
<c:out value="${requestScope.test}" /><br />
</td><br />
</tr><br />
<tr><br />
<td><br />
<b>Session Level</b><br />
</td><br />
<td><br />
<c:out value="${sessionScope.test}" /><br />
</td><br />
</tr><br />
<tr><br />
<td><br />
<b>Application Level</b><br />
</td><br />
<td><br />
<c:out value="${applicationScope.test}" /><br />
</td><br />
</tr><br />
</table><br />
</body><br />
</html></source><br />
<br />
<br />
<!-- end source code --><br />
<br />
<br />
<br />
<br />
<br />
<br />
== Set Variable Scope to Request ==<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>Set in Scope Examples</title><br />
</head><br />
<body><br />
<c:set var="test" value="Request Level Value" scope="request" /><br />
<table border="1"><br />
<tr><br />
<td><br />
<b>Default Level</b><br />
</td><br />
<td><br />
<c:out value="${test}" /><br />
</td><br />
</tr><br />
<tr><br />
<td><br />
<b>Page Level</b><br />
</td><br />
<td><br />
<c:out value="${pageScope.test}" /><br />
</td><br />
</tr><br />
<tr><br />
<td><br />
<b>Request Level</b><br />
</td><br />
<td><br />
<c:out value="${requestScope.test}" /><br />
</td><br />
</tr><br />
<tr><br />
<td><br />
<b>Session Level</b><br />
</td><br />
<td><br />
<c:out value="${sessionScope.test}" /><br />
</td><br />
</tr><br />
<tr><br />
<td><br />
<b>Application Level</b><br />
</td><br />
<td><br />
<c:out value="${applicationScope.test}" /><br />
</td><br />
</tr><br />
</table><br />
</body><br />
</html></source><br />
<br />
<br />
<!-- end source code --><br />
<br />
<br />
<br />
<br />
<br />
<br />
== Set Variable To Page Scope ==<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="java"><br />
<%@ taglib prefix="c" uri="http://java.sun.ru/jstl/core" %><br />
<c:set var="names" value="A B C, D" scope="page" /><br />
<html><br />
<head><br />
<title>forEach and status</title><br />
</head><br />
<body><br />
<c:forEach items="${pageScope.names}"<br />
var="currentName"<br />
varStatus="status"<br />
><br />
Family member #<c:out value="${status.count}" /> is<br />
<c:out value="${currentName}" /> <br /><br />
</c:forEach><br />
</body><br />
</html></source><br />
<br />
<br />
<!-- end source code --></div>
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