如何查找在Liferay的特定页面上添加的portlet? [英] How to find portlets added on a particular page in Liferay?
问题描述
如何查找在特定的Liferay页面上添加了哪些portlet?
How can I find which portlets are added on a particular Liferay page?
例如:
我有三个页面:欢迎， Wiki 和搜索.
For Example:
I have three pages: Welcome, Wiki and Search.
现在所有这些页面上都添加了Portlet，其中一些是可实例化的Portlet(例如Web内容显示和iframe Portlet).
Now all these pages have portlets added on them and some of them are instanceable portlets (like web-content display and iframe portlets).
现在，我想以请求参数的形式将某些信息从Welcome page传递到Search page上的iframe-portlet.
Now I want to pass some information in the form of request parameters to the iframe-portlet on the Search page from the Welcome page.
推荐答案
我发现了两种方法可以做到这一点:
I have found two ways to do this:
-
如果要在添加portlet的同一页面上查找portlet，则可以使用可用于portlet或JSP的
themeDisplay对象:
// In JSP
List<String> portletIdList = themeDisplay.getLayoutTypePortlet().getPortletIds();
// In portlet class
ThemeDisplay themeDisplay = (ThemeDisplay) portletRequest.getAttribute(WebKeys.THEME_DISPLAY);
List<String> portletIdList = themeDisplay.getLayoutTypePortlet().getPortletIds();
如果您想在其他页面上找到这些portlet，那么您应该知道三件事. friendly-url，groupId以及此页面是站点(或社区)的public-page还是private-page，因此代码如下:
If you want to find the portlets on some different page, then you should know three things viz; friendly-url, groupId and whether this page is a public-page or private-page of the Site (or Community), so here is the code:
// 101543 is the SiteId, if it is a public-page then "false" and "/search" is the friendlyURL
LayoutTypePortlet layoutTypePortlet = LayoutTypePortletFactoryUtil.create(LayoutLocalServiceUtil.getFriendlyURLLayout(101543, false, "/search"));
List<String> portletIdList = layoutTypePortlet.getPortletIds();
portletIdList包含带有其instanceId的portletId.因此，现在从列表中，您可以使用com.liferay.portal.util.PortletKeys.IFRAME过滤掉/search页面上的iframe-portlet，您将得到类似48_INSTANCE_rPv9的内容.
The portletIdList contains the portletIds complete with their instanceIds. So now from the list you can just filter out the iframe-portlet on the /search page by using com.liferay.portal.util.PortletKeys.IFRAME and you will get something like 48_INSTANCE_rPv9.
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