Java/JSTL/URL
Версия от 18:01, 31 мая 2010; (обсуждение)
JSTL Constructing URLs
<%@ taglib uri="http://java.sun.ru/jstl/core" prefix="c" %><%@ taglib uri="http://java.sun.ru/jstl/fmt" prefix="fmt" %>
<html>
<head>
<title>Create a URL</title>
</head>
<body>
<form method="POST">
<table border="1" cellpadding="0" cellspacing="0"
style="border-collapse: collapse" bordercolor="#111111"
width="62%" id="AutoNumber1">
<tr>
<td width="100%" colspan="2" bgcolor="#0000FF">
<p align="center">
<b>
<font color="#FFFFFF" size="4">URL
</font>
</b>
</p>
</td>
</tr>
<tr>
<td width="47%">Enter a base URL:</td>
<td width="53%">
<input type="text" name="url" size="20"
value="http://www.jexp.ru"/>
</td>
</tr>
<tr>
<td width="47%">Eneter a value for parameter "parm1"</td>
<td width="53%">
<input type="text" name="parm1" size="20" />
</td>
</tr>
<tr>
<td width="47%">Eneter a value for parameter "parm2"</td>
<td width="53%">
<input type="text" name="parm2" size="20"/>
</td>
</tr>
<tr>
<td width="47%">Eneter a value for parameter "parm3"</td>
<td width="53%">
<input type="text" name="parm3" size="20"/>
</td>
</tr>
<tr>
<td width="100%" colspan="2">
<p align="center">
<input type="submit" value="Submit" name="submit" />
<input type="reset" value="Reset" name="reset" />
</p>
</td>
</tr>
</table>
<p> </p>
</form>
<c:if test="${pageContext.request.method=="POST"}">
<hr>
<c:url value="${param.url}" var="url">
<c:param name="parm1" value="${param.parm1}"/>
<c:param name="parm2" value="${param.parm2}"/>
<c:param name="parm3" value="${param.parm3}"/>
</c:url>
<br/><b>The resulting URL is:</b>
<c:out value="${url}"/>
</c:if>
</body>
</html>
JSTL: generate URL, add parameters to url and display the parameters
<%@ taglib uri="http://java.sun.ru/jstl/core" prefix="c" %>
<html>
<head>
<title>the c:url action (1)</title>
</head>
<body>
This page takes 3 values that you specify, and forwards them to another JSP.
That JSP will create a URL to another page, that then extracts the
parameters and displays them.
<p />
<form action="createURL.jsp" method="post">
<table>
<tr><td>Enter name:</td>
<td><input type="text" name="name" /></td></tr>
<tr><td>Enter age:</td>
<td><input type="text" name="age" /></td></tr>
<tr><td>Enter gender:</td >
<td><input type="text" name="gender" /></td></tr>
</table>
<input type="submit" value="Submit details" />
</form>
</body>
</html>
//createURL.jsp
<%@ taglib uri="http://java.sun.ru/jstl/core" prefix="c" %>
<c:url value="displayValues.jsp" var="displayURL">
<c:param name="nameParam" value="${param.name}" />
<c:param name="ageParam" value="${param.age}" />
<c:param name="genderParam" value="${param.gender}" />
</c:url>
<html>
<head>
<title>the c:url action (2)</title>
</head>
<body>
This page receives the values you specified, and creates a URL that contains
them.
<p />
The generated URL is <c:out value="${displayURL}" />. <p/>
Click to view the it.
</body>
</html>
//displayValues.jsp
<%@ taglib uri="http://java.sun.ru/jstl/core" prefix="c" %>
<html>
<head>
<title>the c:url action (3)</title>
</head>
<body>
<h3>List of query string parameters:</h3>
<ul>
<c:forEach items="${param}" var="currentParam">
<li><c:out value="${currentParam.key}" />
= <c:out value="${currentParam.value}" /></li>
</c:forEach>
</ul>
</body>
</html>
