如何从LIferay / IceFaces / JSF Portlet支持bean中获取URL请求参数

Question

Is posible for a portlet to read a request parameter of its surrounding page?

Eg the URL of the page the portlet resides in is http://example.com/mygroup/mypage?foo=bar Is it possible to read the "foo" parameter from a portlet that is on that page?

Portlet Container is Liferay 6.0.5.

PS

I have already tried:

com.liferay.portal.util.PortalUtil.getOriginalServletRequest(com.liferay.portal.util.PortalUtil.getHttpServletRequest((javax.portlet.PortletRequest) FacesContext.getCurrentInstance().getExternalContext().getRequest())).getParameter("foo")

but I always get null for productId

Thanks!

Answer 1

The following code will do the trick:

javax.portlet.PortletRequest pr = (javax.portlet.PortletRequest)FacesContext.getCurrentInstance().getExternalContext().getRequestMap().get("javax.portlet.request");
java.lang.reflect.Method method = pr.getClass().getMethod("getOriginalHttpServletRequest");
HttpServletRequest httpServletRequest = (HttpServletRequest)method.invoke(pr, new Object[] {});
return httpServletRequest.getParameter(YOUR_PARAM_KEY);

Answer 2

你有没有尝试过

ExternalContext.getRequestParameterMap()

Answer 3

In a partial submit, the icefaces ajax bridge (which replaces a usual jsf portlet bridge) is avoiding the normal portal action/render request, contacting directly the blocking servlet (in order to avoid invalidating other request-scoped portlets and in general, to be faster). Because of this, all those params/attributes which are set in a normal portal request are not set in ajax. They are set only in the initial GET type request for that page. So, actually what you should do is saving those params in the @PostConstruct or some other method of your controlling bean, and then reuse them later. (They wouldn't change in a partial submit anyway, right?). Keep in mind though, that this will not work if you use IceFaces in conjuction with Spring (and their EL Resolver, since that eliminates your extended request scope).

Answer 4

如果您在JSF环境中，请尝试以下操作：

String param = LiferayFacesContext.getInstance().getRequestQueryStringParameter("foo");