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Java/JSTL/Loop - История изменений
2026-04-23T14:40:04Z
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http://www.jexp.ru/index.php?title=Java/JSTL/Loop&diff=6713&oldid=prev
Admin: 1 версия
2010-06-01T06:17:27Z
<p>1 версия</p>
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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 06:17, 1 июня 2010</td>
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Admin
http://www.jexp.ru/index.php?title=Java/JSTL/Loop&diff=6712&oldid=prev
в 18:01, 31 мая 2010
2010-05-31T18:01:44Z
<p></p>
<p><b>Новая страница</b></p><div>== Count to 10 Example: tracking even and odd ==<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="java"><br />
<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"<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="#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><br />
<br />
<br />
</source><br />
<br />
<br />
<!-- end source code --><br />
<br />
<br />
<br />
<br />
<br />
<br />
== Count to 10 Example using JSTL ==<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="java"><br />
<br />
<%@ taglib uri="http://java.sun.ru/jstl/core" prefix="c" %><br />
<html><br />
<head><br />
<title>Count to 10 Example(using JSTL)</title><br />
</head><br />
<body><br />
<table border="1"><br />
<tr><br />
<td valign="top"><br />
<h3>From 1 to 10</h3><br />
<c:forEach var="i" begin="1" end="10"><br />
<c:out value="${i}" /><br />
<br /><br />
</c:forEach><br />
</td><br />
<td valign="top"><br />
<h3>From 10 to 1</h3><br />
<c:forEach var="i" begin="1" end="10"><br />
<c:out value="${11-i}" /><br />
<br /><br />
</c:forEach><br />
</td><br />
</tr><br />
<tr><br />
<td><br />
<h3>By Twos</h3><br />
<c:forEach var="i" begin="2" end="10" step="2"><br />
<c:out value="${i}" /><br />
<br /><br />
</c:forEach><br />
</td><br />
<td valign="top">&nbsp;<br />
</td><br />
</tr><br />
</table><br />
</body><br />
</html><br />
<br />
<br />
</source><br />
<br />
<br />
<!-- end source code --><br />
<br />
<br />
<br />
<br />
<br />
<br />
== JSTL: another for each and status ==<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="java"><br />
<%@ taglib prefix="c" uri="http://java.sun.ru/jstl/core" %><br />
<%<br />
synchronized (pageContext) {<br />
String[] names = {"Joe", "Rosy", "Petter", "Rob"};<br />
pageContext.setAttribute("names", names, PageContext.PAGE_SCOPE);<br />
}<br />
%><br />
<html><br />
<head><br />
<title>forEach and status</title><br />
</head><br />
<body><br />
The forEach tag exposes a scoped variable called "count", which<br />
is the position of the current element within the collection. <br /><br />
<c:forEach var="currentName" items="${pageScope.names}" varStatus="status"><br />
Family member #<c:out value="${status.count}" /> is<br />
<c:out value="${currentName}" /> <br /><br />
</c:forEach><br />
</body><br />
</html><br />
<br />
<br />
</source><br />
<br />
<br />
<!-- end source code --><br />
<br />
<br />
<br />
<br />
<br />
== JSTL: Conditional Support -- Simple Conditional Execution Example ==<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="java"><br />
<br />
<%@ taglib prefix="c" uri="http://java.sun.ru/jstl/core" %><br />
<html><br />
<head><br />
<title>JSTL: Conditional Support -- Simple Conditional Execution Example</title><br />
</head><br />
<body bgcolor="#FFFFFF"><br />
<h3>Loop in JSTL</h3><br />
<c:forEach var="i" begin="1" end="10" step="1"><br />
<c:out value="${i}" /><br />
<br /><br />
</c:forEach><br />
<br />
</body><br />
</html><br />
<br />
</source><br />
<br />
<br />
<!-- end source code --><br />
<br />
<br />
<br />
<br />
<br />
<br />
== JSTL For Each ==<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="java"><br />
<br />
<%@ taglib uri="http://java.sun.ru/jstl/core" prefix="c" %><%@ taglib uri="http://java.sun.ru/jstl/xml" prefix="x" %><br />
<html><br />
<head><br />
<title>Reading RSS</title><br />
</head><br />
<body><br />
<c:import var="news"<br />
url="http://www.wired.ru/news_drop/netcenter/netcenter.rdf" /><br />
<x:parse var="doc" xml="${news}" /><br />
<table border="1" width="100%"><br />
<tr bgcolor="blue"><br />
<td align="center"><br />
<font color="white" size="+2"><br />
<b><br />
<x:out select="$doc/rss/channel/title" /><br />
</b><br />
</font><br />
<br /><br />
<font color="white" size="-2"><br />
<x:out select="$doc/rss/channel/pubDate" /><br />
</font><br />
</td><br />
</tr><br />
<tr><br />
<td valign="top"><br />
<x:out select="$doc/rss/channel/description" /><br />
</td><br />
</tr><br />
<x:forEach var="story" select="$doc/rss/channel/item"><br />
<tr bgcolor="blue"><br />
<td align="center"><br />
<br />
<br />
<br />
<br />
== JSTL: for each and scoped variable ==<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="java"><br />
<br />
<%@ taglib prefix="c" uri="http://java.sun.ru/jstl/core" %><br />
<c:set var="names" value="Joe, Zhou" scope="page" /><br />
<html><br />
<head><br />
<title>forEach and status</title><br />
</head><br />
<body><br />
<h1>The forEach tag exposes a scoped variable called "count", which<br />
is the position of the current iteration of the collection.</h1><br />
<h2>(Note, it is <i>not</i> the position of the element in the<br />
underlying collection)</h2><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="${currentName}" /> <br /><br />
</c:forEach><br />
</body><br />
</html><br />
<br />
</source><br />
<br />
<br />
<!-- end source code --><br />
<br />
<br />
<br />
<br />
<br />
== JSTL: for each and status ==<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="java"><br />
<br />
<%@ taglib prefix="c" uri="http://java.sun.ru/jstl/core" %><br />
<c:set var="names" value="Joe, Rob, Rosy, Sissi" scope="page" /><br />
<html><br />
<head><br />
<title>forEach and status</title><br />
</head><br />
<body><br />
<h1>The forEach tag exposes a scoped variable called "count", which<br />
is the position of the current iteration of the collection.</h1><br />
<h2>(Note, it is <i>not</i> the position of the element in the<br />
underlying collection)</h2><br />
<c:forEach items="${pageScope.names}"<br />
var="currentName"<br />
varStatus="status"<br />
begin="0"<br />
end="3"<br />
step="2"<br />
><br />
Family member #<c:out value="${status.count}" /> is<br />
<c:out value="${currentName}" /> <br /><br />
</c:forEach><br />
</body><br />
</html><br />
<br />
<br />
</source><br />
<br />
<br />
<!-- end source code --><br />
<br />
<br />
<br />
<br />
<br />
== JSTL: for each loop ==<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="java"><br />
<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 />
<%!<br />
String[] names = { "Joe", "Rosy", "Sissi", "Sun" };<br />
int[] ages = {29, 8, 6, 5};<br />
%><br />
<HTML><br />
<HEAD><TITLE>JSTL "forEach" tag</TITLE></HEAD><br />
<BODY><br />
<H1>List of people</H1><br />
<TABLE BORDER="1"><br />
<TH>Name</TH><br />
<c-rt:forEach var="person" items="<%= names %>"><br />
<TR><br />
<TD><c:out value="${person}" /></TD><br />
<TD><c:out value="${ages[i]}" /></TD><br />
</TR><br />
</c-rt:forEach><br />
</TABLE><br />
</BODY><br />
</HTML> <br />
<br />
<br />
</source><br />
<br />
<br />
<!-- end source code --><br />
<br />
<br />
<br />
<br />
<br />
== JSTL Form Value and ForEach Loop ==<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="java"><br />
<br />
<html><br />
<head><br />
<title>Page Data Example</title><br />
</head><br />
<body><br />
<table border="1"><br />
<form method="POST" action="params2.jsp"><br />
<tr><br />
<td width="33%"><br />
<b>First Name</b><br />
</td><br />
<td width="73%"><br />
<input type="text" name="first" size="40" /><br />
</td><br />
</tr><br />
<tr><br />
<td width="33%"><br />
<b>Last Name</b><br />
</td><br />
<td width="73%"><br />
<input type="text" name="last" size="40" /><br />
</td><br />
</tr><br />
<tr><br />
<td width="33%"><br />
<b>Address</b><br />
</td><br />
<td width="73%"><br />
<input type="text" name="address" size="40" /><br />
</td><br />
</tr><br />
<tr><br />
<td width="33%"><br />
<b>City</b><br />
</td><br />
<td width="73%"><br />
<input type="text" name="city" size="20" /><br />
</td><br />
</tr><br />
<tr><br />
<td width="33%"><br />
<b>State</b><br />
</td><br />
<td width="73%"><br />
<input type="text" name="state" size="20" /><br />
</td><br />
</tr><br />
<tr><br />
<td width="33%"><br />
<b>ZIP</b><br />
</td><br />
<td width="73%"><br />
<input type="text" name="zip" size="20" /><br />
</td><br />
</tr><br />
<tr><br />
<td colspan="2"><br />
<input type="submit" value="Submit" name="action" /><br />
<input type="reset" value="Reset" name="action" /><br />
</td><br />
</tr><br />
</form><br />
</table><br />
</body><br />
</html><br />
/////////////////////////////////////////////////////////////////////////////////////<br />
//File: params2.zip<br />
<br />
</source><br />
<br />
<br />
<!-- end source code --><br />
<br />
<br />
<br />
<br />
<br />
<br />
== JSTL: fortokens ==<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="Joe:Petter;Ryan|John" scope="page" /><br />
<html><br />
<head><br />
<title>forTokens action</title><br />
</head><br />
<body><br />
<c:forTokens items="${pageScope.names}"<br />
delims=":;|"<br />
var="currentName"<br />
varStatus="status"<br />
><br />
Family member #<c:out value="${status.count}" /> is<br />
<c:out value="${currentName}" /> <br /><br />
</c:forTokens><br />
</body><br />
</html><br />
<br />
<br />
</source><br />
<br />
<br />
<!-- end source code --><br />
<br />
<br />
<br />
<br />
<br />
== JSTL Tag collaboration with a fixed loop ==<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="java"><br />
<br />
<%@ taglib uri="http://java.sun.ru/jstl/core" prefix="c" %><br />
<%@ taglib uri="http://java.sun.ru/jstl/core-rt" prefix="c-rt" %><br />
<html><br />
<head><br />
<title>Count to 10 Example(tracking even and odd)</title><br />
</head><br />
<body><br />
<table border="0"><br />
<c:forEach var="i" begin="1" end="10" varStatus="status"><br />
<jsp:useBean id="status"<br />
type="javax.servlet.jsp.jstl.core.LoopTagStatus" /><br />
<c-rt:choose><br />
<c-rt:when test="<%=status.getCount()%2==0%>"><br />
<c:set var="color" value="#eeeeee" /><br />
</c-rt:when><br />
<c-rt:otherwise><br />
<c:set var="color" value="#dddddd" /><br />
</c-rt:otherwise><br />
</c-rt:choose><br />
<tr><br />
<td width="200" bgcolor="<c:out value="${color}"/>"> <br />
<c:out value="${i}" /><br />
</td><br />
</tr><br />
</c:forEach><br />
</table><br />
</body><br />
</html><br />
<br />
<br />
</source><br />
<br />
<br />
<!-- end source code --></div>