Java/JSTL/URL
JSTL Constructing URLs
<source lang="java">
<%@ 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">
|
URL |
|
| Enter a base URL: |
<input type="text" name="url" size="20"
value="http://www.jexp.ru"/>
|
| Eneter a value for parameter "parm1" |
<input type="text" name="parm1" size="20" /> |
| Eneter a value for parameter "parm2" |
<input type="text" name="parm2" size="20"/> |
| Eneter a value for parameter "parm3" |
<input type="text" name="parm3" size="20"/> |
|
<input type="submit" value="Submit" name="submit" /> <input type="reset" value="Reset" name="reset" /> |
|
</form>
<c:if test="${pageContext.request.method=="POST"}">
<c:url value="${param.url}" var="url">
<c:param name="parm1" value="${param.parm1}"/>
<c:param name="parm2" value="${param.parm2}"/>
<c:param name="parm3" value="${param.parm3}"/>
</c:url>
The resulting URL is:
<c:out value="${url}"/>
</c:if>
</body>
</html>
</source>
JSTL: generate URL, add parameters to url and display the parameters
<source lang="java">
<%@ 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">
| Enter name: | <input type="text" name="name" /> |
| Enter age: | <input type="text" name="age" /> |
| Enter gender: | <input type="text" name="gender" /> |
<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>
List of query string parameters:
-
<c:forEach items="${param}" var="currentParam">
- <c:out value="${currentParam.key}" /> = <c:out value="${currentParam.value}" />
</c:forEach>
</body>
</html>
</source>
