2015-10-03 17:50 GMT+02:00 Christopher Schultz <ch...@christopherschultz.net>: > Is this the latest wisdom for accessing action properties from JSPs > using EL? > > https://struts.apache.org/docs/access-to-valuestack-from-jsps.html > > So if my action has a "public String getItems)" method, I'd like to do > something as close as possible to this: > > <c:forEach var="item" items="$action.items"> > </c:forEach> > > It looks like I can do this very quickly: > > <%@ taglib uri="http://java.sun.com/jsp/jstl/core"; prefix="c" %> > <%@ taglib prefix="s" uri="/struts-tags" %> > <s:set var="action" value="items" /> > <c:forEach var="item" value="${items}"> > ... > </c:forEach> > > Is there something I can do to bind "action" to the actual action > instance? > > Or I can use the Struts 2 "iterate" tag: > > <%@ taglib prefix="s" uri="/struts-tags" %> > <s:iterator var="item" value="items"> > </s:iterator> > > I realize that this is a simple example, but is there a recommended > technique, here? EL gives me the ability to do things like print > values with somewhat less code: "${fn:escapeXml(foo)}" versus > <s:property escapeHtml="true" value="foo" /> > > In general, EL seems to be more universally understood, while the s2 > tags are a bit more specialized. > > Any suggestions are appreciated.
JSTL/EL are supported out-of-the-box https://struts.apache.org/docs/can-we-use-jstl-with-the-framework.html > (After writing all of the above and experimenting, I've found that I > can reference ${items} in my JSP without doing anything with the > Struts2 tags: no <s:set> required. How is that working? Does S2 export > all my beans from the action (and other places?) to the request > attributes?). The magic happens in StrutsRequestWrapper (Struts wraps each request with dedicated class). The wrapper first tries to fetch the attribute from the original request, if not found, it will use ValueStack to find the value. https://github.com/apache/struts/blob/master/core/src/main/java/org/apache/struts2/dispatcher/StrutsRequestWrapper.java#L72-L104 Regards -- Łukasz + 48 606 323 122 http://www.lenart.org.pl/ --------------------------------------------------------------------- To unsubscribe, e-mail: user-unsubscr...@struts.apache.org For additional commands, e-mail: user-h...@struts.apache.org
