On 11/1/05, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
>
> Has anyone used the display tag library at http://displaytag.sourceforge.net/
> in a Struts application?
>
> If so what did you think of it?
These two listings print out items in a pageable table and have links
for view, edit and delete operations. Compare and choose for yourself
(the code may not be perfect, but it gives the idea).
(1) Struts-EL + JSTL
=== cut here, start ===
<table width="100%">
<thead>
<tr>
<th>ID</th>
<th>Str Value</th>
<th>Int Value</th>
<th>Link Actions</th>
<th>Button Actions</th>
</tr>
</thead>
<!-- Show item list -->
<logic-el:iterate id="item"
collection="${crudform.items}"
offset="${crudform.offset}"
length="${crudform.pagesize}"
type="net.jspcontrols.dialogs.samples.crudaction.business.BusinessObj">
<html:form action="/crudactionlite.do">
<tr>
<td><c:out value="${item.itemId}"/></td>
<td><c:out value="${item.stringValue}"/></td>
<td><c:out value="${item.intValue}"/></td>
<td>
<html-el:link
href="crudactionlite.do?DIALOG-EVENT-VIEW&itemId=${item.itemId}">View</html-el:link>
|
<html-el:link
href="crudactionlite.do?DIALOG-EVENT-EDIT&itemId=${item.itemId}">Edit</html-el:link>
|
<html-el:link
href="crudactionlite.do?DIALOG-EVENT-DELETE&itemId=${item.itemId}">Delete</html-el:link>
|
</td>
</tr>
<html:hidden name="item" property="itemId"/>
</html:form>
</logic-el:iterate>
</table>
=== cut here, end ===
(2.1) Displaytag-EL, JSP
=== cut here, start ===
<!-- Displaytag counts from 1, so adding 1 to zero-based crudform.offset -->
<display:table name="${crudform.items}"
offset="${crudform.offset+1}"
length="${crudform.pagesize}"
decorator="net.jspcontrols.dialogs.samples.crudaction.MyListDecorator">
<display:column property="itemId" title="ID" />
<display:column property="stringValue" title="Str Value" />
<display:column property="intValue" title="Int Value" />
<display:column property="operationsLinks" title="Actions" />
</display:table>
=== cut here, end ===
(2.2) Displaytag-EL, decorator
=== cut here, start ===
public class MyListDecorator extends TableDecorator {
public String getOperationsLinks()
{
BusinessObj lObject= (BusinessObj)getCurrentRowObject();
String lId= lObject.getItemId();
return "<a href=\"crudactionlite.do?DIALOG-EVENT-VIEW&itemId="
+ lId + "\">View</a> | " +
"<a
href=\"crudactionlite.do?DIALOG-EVENT-UPDATE&itemId=" + lId +
"\">Edit</a> | " +
"<a
href=\"crudactionlite.do?DIALOG-EVENT-DELETE&itemId=" + lId +
"\">Delete</a>";
}
}
=== cut here, end ===
Note, that you may need to use something like
HttpServletRequest.getServletPath() in a decorator to ensure the
proper path to your action. Maybe you can return a string, containing
Struts tags, I never tried that.
DisplayTag can do much more than simple pageable tables, and it is an
established library, used by many.
Michael.
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