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Java Tutorial/JSTL/ForEach - История изменений
2026-04-20T20:28:43Z
История изменений этой страницы в вики
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http://jexp.ru/index.php?title=Java_Tutorial/JSTL/ForEach&diff=3381&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;">Версия 17:44, 31 мая 2010</td>
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http://jexp.ru/index.php?title=Java_Tutorial/JSTL/ForEach&diff=3382&oldid=prev
Admin: 1 версия
2010-05-31T15:23:21Z
<p>1 версия</p>
<p><b>Новая страница</b></p><div>== Check Even Odd Number in ForEach Loop ==<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 />
<%@ 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 />
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<!-- end source code --><br />
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== JSTL ForEach Loop ==<br />
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<!-- start source code --><br />
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<source lang="java"><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 />
<c:forEach var="i" begin="1" end="10" step="1"><br />
<c:out value="${i}" /><br />
<br /><br />
</c:forEach><br />
</body><br />
</html></source><br />
<br />
<br />
<!-- end source code --><br />
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== JSTL ForEach Loop with Begin/End Step ==<br />
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<!-- start source code --><br />
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<source lang="java"><br />
<%@ taglib prefix="c" uri="http://java.sun.ru/jstl/core" %><br />
<c:set var="names" value="Peter, Pat, Mark, Tracy" scope="page" /><br />
<html><br />
<head><br />
<title>forEach and status</title><br />
</head><br />
<body><br />
<h1>The forEach tag exposes a scoped variable called "count", which<br />
is the position of the current iteration of the collection.</h1><br />
<h2>(Note, it is <i>not</i> the position of the element in the<br />
underlying collection)</h2><br />
<c:forEach items="${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></source><br />
<br />
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<!-- end source code --><br />
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== JSTL ForEach Loop With Step ==<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>Count to 10 Example(using JSTL)</title><br />
</head><br />
<body><br />
<table border="1"><br />
<tr><br />
<td><br />
<h3>By Twos</h3><br />
<c:forEach var="i" begin="2" end="10" step="2"><br />
<c:out value="${i}" /><br />
<br /><br />
</c:forEach><br />
</td><br />
<td valign="top">&nbsp;<br />
</td><br />
</tr><br />
</table><br />
</body><br />
</html></source><br />
<br />
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<!-- end source code --><br />
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== JSTL ForEach Status Count ==<br />
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<!-- start source code --><br />
<br />
<source lang="java"><br />
<%@ taglib prefix="c" uri="http://java.sun.ru/jstl/core" %><br />
<c:set var="names" value="A B C, D" scope="page" /><br />
<html><br />
<head><br />
<title>forEach and status</title><br />
</head><br />
<body><br />
<c:forEach items="${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 />
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<!-- end source code --><br />
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== JSTL Integer Controlled Loop ==<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>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 />
</table><br />
</body><br />
</html></source><br />
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<!-- end source code --><br />
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== Reference Array by Index ==<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 />
<%@ taglib uri="http://java.sun.ru/jstl/core_rt" prefix="c-rt" %><br />
<%!<br />
String[] names = { "A","B", "C", "D" };<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></source><br />
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<!-- end source code --><br />
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== Use ForEach to Loop Through ArrayList ==<br />
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<!-- start source code --><br />
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<source lang="java"><br />
<%@ page language="java" contentType="text/html" %><br />
<%@ page import="java.util.*" %><br />
<%@ taglib prefix="c" uri="http://java.sun.ru/jstl/core" %><br />
<%<br />
// Create an ArrayList with test data<br />
ArrayList list = new ArrayList();<br />
Map author1 = new HashMap();<br />
author1.put("name", "A");<br />
author1.put("id", new Integer(1));<br />
list.add(author1);<br />
Map author2 = new HashMap();<br />
author2.put("name", "B");<br />
author2.put("id", new Integer(2));<br />
list.add(author2);<br />
Map author3 = new HashMap();<br />
author3.put("name", "C");<br />
author3.put("id", new Integer(3));<br />
list.add(author3);<br />
pageContext.setAttribute("authors", list);<br />
%><br />
<html><br />
<head><br />
<title>Search result: Authors</title><br />
</head><br />
<body bgcolor="white"><br />
Here are all authors matching your search critera:<br />
<table><br />
<TH>Name</th><br />
<TH>Id</th><br />
<c:forEach items="${authors}" var="current"><br />
<tr><br />
<td><c:out value="${current.name}" /><td><br />
<td><c:out value="${current.id}" /><td><br />
</tr><br />
</c:forEach><br />
</table><br />
</body><br />
</html></source><br />
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<!-- end source code --><br />
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== Use For Each to Loop Through Comma Delimited String ==<br />
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<!-- start source code --><br />
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<source lang="java"><br />
<%@ taglib uri="http://java.sun.ru/jstl/core" prefix="c" %><br />
<%@ taglib uri="http://java.sun.ru/jstl/core-rt" prefix="c-rt" %><br />
<html><br />
<head><br />
<title>Count to 10 Example(tracking even and odd)</title><br />
</head><br />
<body><br />
<c:set var="days" value="A,B,C,D,E,F,G" /><br />
<table border="0"><br />
<c:forEach var="i" items="${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 />
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<!-- end source code --><br />
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== Use JSTL ForEach Tag to Loop Through a String ==<br />
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<!-- start source code --><br />
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<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 />
<%<br />
String[] bikes = { "A", "B", "C" };<br />
%><br />
<!-- application.setAttribute("bikeList", bikes); --> <br />
<HTML><br />
<HEAD><TITLE>JSTL "forEach" tag</TITLE></HEAD><br />
<BODY><br />
Here are my bikes:<br />
<UL><br />
<c-rt:forEach var="bike" items="<%= bikes %>"><br />
<LI><c:out value="${bike}" /><br />
</c-rt:forEach><br />
</UL><br />
</BODY><br />
</HTML></source><br />
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<!-- end source code --><br />
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== Use JSTL ForEach to Loop through a Vector ==<br />
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<!-- start source code --><br />
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<source lang="java"><br />
<!--<br />
Licensed to the Apache Software Foundation (ASF) under one or more<br />
contributor license agreements. See the NOTICE file distributed with<br />
this work for additional information regarding copyright ownership.<br />
The ASF licenses this file to You under the Apache License, Version 2.0<br />
(the "License"); you may not use this file except in compliance with<br />
the License. You may obtain a copy of the License at<br />
http://www.apache.org/licenses/LICENSE-2.0<br />
Unless required by applicable law or agreed to in writing, software<br />
distributed under the License is distributed on an "AS IS" BASIS,<br />
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<br />
See the License for the specific language governing permissions and<br />
limitations under the License.<br />
--><br />
<html><br />
<head><br />
<title>Tag Plugin Examples: forEach</title><br />
</head><br />
<body><br />
<h1>Tag Plugin Examples - &lt;c:forEach></h1><br />
<hr><br />
<font color="#000000"/><br />
</br><br />
<%@ taglib uri="http://java.sun.ru/jstl/core" prefix="c" %><br />
<%@ page import="java.util.Vector" %><br />
<% Vector v = new Vector();<br />
v.add("One"); v.add("Two"); v.add("Three"); v.add("Four");<br />
pageContext.setAttribute("vector", v);<br />
%><br />
<h3>Iterating over a Vector</h3><br />
<c:forEach items="${vector}" var="item" ><br />
<c:out value="${item}"/><br />
</c:forEach><br />
<br />
</body><br />
</html></source><br />
<br />
<br />
<!-- end source code --></div>
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