Many times I have needed to use an
pagination for many data to be shown in my page, however there is no a good Tag implemented for Struts and not as JSF that has components for it..
There is a good encapsulation with the great library
DisplayTag, but this one doesn't give too much freedom to create different things, thus this approach is more flexible.
Finally searching for the web I found a simple JSTL pagination, where you can give a collection of data and at level of presentation parse it and embedded with html and javascript we can get the final pagination that we wish.
http://web.archive.org/web/20071213001753/http://www.ekcsoft.com/jstl/content/paginate/ (it is no longer alive).
It has a small bug when the collection is empty therefore the totalCount is zero.
It can be put inside Struts without problems, below can see code of it,:
<c:set var="totalCount" scope="session" value="${queryResults.rowCount}"/>
<c:set var="perPage" scope="session" value="20"/>
<c:set var="totalPages" scope="session" value="${totalCount/perPage}"/>
<c:set var="pageIndex" scope="session" value="${param.start/perPage+1}"/>
<c:if test="${!empty param.start && param.start >(perPage-1) && param.start !=0 }">
<a href="?start=<c:out value="${param.start - perPage}"/>">Prev </a>
</c:if>
<c:forEach
var="boundaryStart"
varStatus="status"
begin="0"
end="${totalCount - 1}"
step="${perPage}">
<c:choose>
<c:when test="${status.count>0 && status.count != pageIndex}">
<a href="?start=<c:out value='${boundaryStart}'/>">
<c:out value="${status.count}"/> |
</a>
</c:when>
<c:otherwise>
<c:out value="${status.count}"/> |
</c:otherwise>
</c:choose>
</c:forEach>
<c:if test="${empty param.start || param.start<(totalCount-perPage)}">
<a href="?start=<c:out value="${param.start + perPage}"/>">Next </a>
</c:if>
