Monday, July 09, 2012

JSF Tip of the Day: <ui:repeat /> Usage Example


A common use case is to iterate over a collection of elements, and display them on a page. In the world of JSP, we would use a Java Standard Tag Library (JSTL) <c:forEach/>. This will work in JSF, but does have the same lifecycle as JSF which can cause issues if the data is dependent on the JSF lifecycle.
The solution is to use <ui:repeat/> to iterate over the collection. The <ui:repeat/> Facelets component is designed to work with JSF. It has the same lifecycle as the other JSF components on the page, and is a lot more flexible than the <c:forEach/> tag.


The examples in this project demonstrate a number of methods to utilize the <ui:repeat/> in your own project.


There is a bug in versions of Mojarra less than 2.1.9 that the size includes the end element as per JAVASERVERFACES-2210.It was fixed as of version 2.1.9. Note: You will need to upgrade JSF libraries in GlassFish to see the corrections. Please see the release notes for Java Server Faces for upgrade procedures. The project was developed using NetBeans 7 IDE and Apache Maven. The project was tested on GlassFish 3.1.2.

The code for the project can be downloaded here:




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