geschiedenis
Dit is de zoveelste incarnatie van mijn website wie nieuwsgierig is kan de
oudere 'recente' wijzigingen bekijken.
I was looking for a way to validate email addresses in jstl, or rather in a jspx template, and used org.apache.commons.validator for that purpose.
You need to download and install the commons-validator jar first to make it available to your web application.
This short example uses the org.apache.commons.validator.routines.EmailValidator class.
<jsp:root
xmlns:jsp="http://java.sun.com/JSP/Page"
xmlns:c="http://java.sun.com/jsp/jstl/core"
xmlns="http://www.w3.org/1999/xhtml"
version="2.0">
<jsp:directive.page
import="org.apache.commons.validator.routines.*" />
<jsp:root
xmlns:jsp="http://java.sun.com/JSP/Page"
xmlns:c="http://java.sun.com/jsp/jstl/core"
xmlns="http://www.w3.org/1999/xhtml"
version="2.0">
<jsp:directive.page
import="org.apache.commons.validator.routines.*" />
<jsp:scriptlet>
String email = request.getParameter("email");
Boolean valid = false;
if (EmailValidator.getInstance().isValid(email)) {
valid = true;
}
pageContext.setAttribute("valid", valid);
</jsp:scriptlet>
<c:choose>
<c:when test="${valid}">
<em>${param.email} is valid.</em>
</c:when>
<c:otherwise>
<em>${param.email} is NOT valid.</em>
</c:otherwise>
</c:choose>
</jsp:root>
Copy it and try it out.
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Dit is de zoveelste incarnatie van mijn website wie nieuwsgierig is kan de
oudere 'recente' wijzigingen bekijken.En ik heb hier een pagina waarop ik nieuwe en oudere versies van my_editors verzamel.