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generate Struts2 Control tag iterator code snippet

Iterator will iterate over a value. An iterable value can be either of: java.util.Collection, java.util.Iterator,

iterator

status
value
var

Examples 1 The following example retrieves the value of the getDays() method of the current object on the value stack and uses it to iterate over. The <s:property/> tag prints out the current value of the iterator.

<s:iterator value="days">

<p>day is: <s:property/></p>

</s:iterator>

Examples 2 The following example uses a Bean tag and places it into the ActionContext. The iterator tag will retrieve that object from the ActionContext and then calls its getDays() method as above. The status attribute is also used to create a IteratorStatus object, which in this example, its odd() method is used to alternate row colours:

<s:bean name="org.apache.struts2.example.IteratorExample" var="it">

<s:param name="day" value="'foo'"/>

<s:param name="day" value="'bar'"/>

</s:bean>

<p/>

<table border="0" cellspacing="0" cellpadding="1">

<tr>

<th>Days of the week</th>

</tr>

<p/>

<s:iterator value="#it.days" status="rowstatus">

<tr>

<s:if test="#rowstatus.odd == true">

<td style="background: grey"><s:property/></td>

</s:if>

<s:else>

<td><s:property/></td>

</s:else>

</tr>

</s:iterator>

</table>

Examples 3 The next example will further demonstrate the use of the status attribute, using a DAO obtained from the action class through OGNL, iterating over groups and their users (in a security context). The last() method indicates if the current object is the last available in the iteration, and if not, we need to seperate the users using a comma:

<s:iterator value="groupDao.groups" status="groupStatus">

<tr class="<s:if test="#groupStatus.odd == true ">odd</s:if><s:else>even</s:else>">

<td><s:property value="name" /></td>

<td><s:property value="description" /></td>

<td>

<s:iterator value="users" status="userStatus">

<s:property value="fullName" /><s:if test="!#userStatus.last">,</s:if>

</s:iterator>

</td>

</tr>

</s:iterator>

references http://struts.apache.org/2.x/docs/iterator.html