-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Lukasz,
On 10/4/15 3:49 AM, Lukasz Lenart wrote: > 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/ap ache/struts2/dispatcher/StrutsRequestWrapper.java#L72-L104 Thanks > for the explanation. I'm very happy that this works... the reference I provided at the top of my post suggests that working with non-Struts2-provided tags could be difficult, but it hasn't been difficult at all. Thanks, - -chris -----BEGIN PGP SIGNATURE----- Comment: GPGTools - http://gpgtools.org iQIcBAEBCAAGBQJWEW3YAAoJEBzwKT+lPKRYFSAQALqOJtcI6DxVdICqn4QVZB28 gtq51KVfs9EjaEBiuX4VqHiXOwDllegE2ruf18fvwZaD35lAeW22SRDcy0EquhAJ qcWwdl3qxT9ge/sTgN3LaLpCJsJRgL+/IoSJ3MPH7/VhEPsM2roK/G2fcs5d9SQS zGtGB09HEWuSL8Vm8KfIg2MdnejCDuWG0nrQcf6765C5sMTUTPYuNo+GgpBbjuad zoyV6Lx7GhkQsrIUK4RDcMbKy7vd3In+2BmwDWR6hbMD2c5Nlbp7jJbpGaz760wS itVi6TLslzASL3nBcmfOKv4NoEbOl6eT4/rOYbc8+9d6umMDTMa0OnDRnBl+FHVT LHT/dwTlKThEGTKry74giR9xVV7kwnmk0Q5e3LmUns3gwYTMYOKHsOclVO6Bui6S YyLjh7yfKi5vK/XNiaMNABkJOV/bLr46GYt9aA1X/tStV1EFbj3GQrZOHNPO+CPz fqDctZkasuTUERhcp5lHRkekJhzLAjZtKPxacLWG4TQsdaYLTpHOSrvEGa5FEN2j bBMGuDz7EVqOvGrXz2FdkP9e1oSCerQ1SBEWH9sr4yCwfIxkdyRr+zsz1pOlhD8o lpSnUaViD7XJlZ8jKmaxMrk5xXRWzvvEujQlzIwAv2yNQm4XoRTrMa5kLl1qGaHH fgcO2slGew8p5aSDibPd =Bi6o -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: user-unsubscr...@struts.apache.org For additional commands, e-mail: user-h...@struts.apache.org
