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Java Tutorial/JSTL/Session - История изменений
2026-04-22T08:20:36Z
История изменений этой страницы в вики
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http://www.jexp.ru/index.php?title=Java_Tutorial/JSTL/Session&diff=3413&oldid=prev
в 17:44, 31 мая 2010
2010-05-31T17:44:26Z
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http://www.jexp.ru/index.php?title=Java_Tutorial/JSTL/Session&diff=3414&oldid=prev
Admin: 1 версия
2010-05-31T15:23:33Z
<p>1 версия</p>
<p><b>Новая страница</b></p><div>== Get HTTP Session by using JSTL ==<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>Page Data Example</title><br />
</head><br />
<body><br />
<h3>&#160;</h3><br />
<table border="1" width="539"><br />
<tr><br />
<td colspan="2" width="529" bgcolor="#0000FF"><br />
<b><br />
<font color="#FFFFFF" size="4">HTTP<br />
Session(pageContext.session.)</font><br />
</b><br />
</td><br />
</tr><br />
<tr><br />
<td width="210">Creation Time</td><br />
<td width="313">&#160; <br />
<c:out value="${pageContext.session.creationTime}" /><br />
</td><br />
</tr><br />
<tr><br />
<td width="210">Session ID</td><br />
<td width="313">&#160; <br />
<c:out value="${pageContext.session.id}" /><br />
</td><br />
</tr><br />
<tr><br />
<td width="210">Last Accessed Time</td><br />
<td width="313">&#160; <br />
<c:out value="${pageContext.session.lastAccessedTime}" /><br />
</td><br />
</tr><br />
<tr><br />
<td width="210">Max Inactive Interval</td><br />
<td width="313">&#160; <br />
<c:out<br />
value="${pageContext.session.maxInactiveInterval}" /><br />
seconds</td><br />
</tr><br />
<tr><br />
<td width="210">You have been on-line for</td><br />
<td width="313">&#160; <br />
<c:out<br />
value="${(pageContext.session.lastAccessedTime-pageContext.session.creationTime)/1000}" /><br />
seconds</td><br />
</tr><br />
</table><br />
</body><br />
</html></source><br />
<br />
<br />
<!-- end source code --><br />
<br />
<br />
<br />
<br />
<br />
<br />
== Remove Attribute From Session ==<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="java"><br />
<%@ taglib uri="http://java.sun.ru/jstl/core" prefix="c" %><br />
<c:set var="userName" value="Mark" scope="session" /><br />
<html><br />
<head><br />
<title>Chapter 5 - Set a scoped attribute</title><br />
</head><br />
<body><br />
This page sets a session-scoped attribute that is removed<br />
by <br />
<br />
<br />
<br />
== Set Variable Scope to Session ==<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="java"><br />
<%@ taglib uri="http://java.sun.ru/jstl/core" prefix="c" %><br />
<html><br />
<head><br />
<title>Set in Scope Examples</title><br />
</head><br />
<body><br />
<c:set var="test" value="Session Level Value" scope="session" /><br />
<table border="1"><br />
<tr><br />
<td><br />
<b>Default Level</b><br />
</td><br />
<td><br />
<c:out value="${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 />
== Update Session Date using JSTL ==<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="java"><br />
<%@page contentType="text/html"%><br />
<%@ taglib uri="http://java.sun.ru/jstl/core" prefix="c" %><br />
<%@ taglib uri="http://java.sun.ru/jstl/fmt" prefix="fmt" %><br />
<html><br />
<head><title>View Session JSP </title></head><br />
<body><br />
<h2>Session Info From A JSP</h2><br />
The session id: <c:out value="${pageContext.session.id}"/><br />
<h3>Session date values formatted as Dates</h3><br />
<jsp:useBean id="timeValues" class="java.util.Date"/><br />
<c:set target="${timeValues}" value="${pageContext.session.creationTime}" property="time"/><br />
The creation time: <fmt:formatDate value="${timeValues}" type="both" dateStyle="medium" /><br><br><br />
<c:set target="${timeValues}" value="${pageContext.session.lastAccessedTime}" property="time"/><br />
The last accessed time: <fmt:formatDate value="${timeValues}" type="both" dateStyle="short" /><br />
<c:out value="${timeValues}"/><br />
</body><br />
</html></source><br />
<br />
<br />
<!-- end source code --><br />
<br />
<br />
<br />
<br />
<br />
<br />
== Use JSTL to Deal with Session ==<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 />
<c:if test="${pageContext.request.method=="POST"}"><br />
<c:set var="uid" value="${param.uid}" scope="session" /><br />
<jsp:forward page="session2.jsp" /><br />
</c:if><br />
<html><br />
<head><br />
</head><br />
<body><br />
<form method="POST"><br />
<table border="1" cellpadding="0" cellspacing="0"<br />
style="border-collapse: collapse" bordercolor="#111111"<br />
width="42%" id="AutoNumber1"><br />
<tr><br />
<td width="100%" colspan="2" bgcolor="#0000FF"><br />
<p align="center"><br />
<b><br />
<font size="4" color="#FFFFFF">Please Login</font><br />
</b><br />
</p><br />
</td><br />
</tr><br />
<tr><br />
<td width="19%">User Name</td><br />
<td width="81%"><br />
<input type="text" name="uid" size="20" /><br />
</td><br />
</tr><br />
<tr><br />
<td width="19%">Password</td><br />
<td width="81%"><br />
<input type="password" name="pwd" size="20" /><br />
</td><br />
</tr><br />
<tr><br />
<td width="100%" colspan="2"><br />
<p align="center"><br />
<input type="submit" value="Submit" name="action" /><br />
<input type="reset" value="Reset" name="B2" /><br />
</p><br />
</td><br />
</tr><br />
</table><br />
</form><br />
<p align="left"><br />
<i>Note: you may use any ID/Password, security is not<br />
checked.</i><br />
</p><br />
</body><br />
</html></source><br />
<br />
<br />
<!-- end source code --><br />
<br />
<br />
<br />
<br />
<br />
<br />
== View Session Date using JSTL ==<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="java"><br />
<%@page contentType="text/html"%><br />
<%@ taglib uri="http://java.sun.ru/jstl/core" prefix="c" %><br />
<%@ taglib uri="http://java.sun.ru/jstl/fmt" prefix="fmt" %><br />
<html><br />
<head><title>View Session JSP </title></head><br />
<body><br />
<h2>Session Info From A JSP</h2><br />
The session id: <c:out value="${pageContext.session.id}"/><br><br><br />
The session creation time as a long value: <c:out value="${pageContext.session.creationTime}"/><br><br><br />
The last accessed time as a long value: <c:out value="${pageContext.session.lastAccessedTime}"/><br><br><br />
</body><br />
</html></source><br />
<br />
<br />
<!-- end source code --></div>
Admin