java - Struts2 - Result generated by append tag cannot be iterated multiple times -

java - Struts2 - Result generated by append tag cannot be iterated multiple times -

here code snippet:

<s:set value="{1,2,3}" var="list1" /> <s:set value="{4,5,6}" var="list2" /> <s:append var="list3"> <s:param value="#list1" /> <s:param value="#list2" /> </s:append> <s:iterator value="#list3"> <s:property /> </s:iterator> <hr /> <s:iterator value="#list3"> <s:property /> </s:iterator> <hr />

here result:

1 2 3 4 5 6 --------------------------------------------------------------------- ---------------------------------------------------------------------

the sec <s:iterator> tag not work @ all, happened #list3, #list3 empty list ?

your #list3 not list reference appended iterator (instance of appenditeratorfilter). how <s:append> tag works. remove iteratable sources after iteration. can phone call hasnext() method on appended iterator see if has more elements in it. , next() method next element.

<s:iterator value="#list3"> <s:property /> <s:property value="#list3.hasnext()"/> </s:iterator>

java jsp struts2