如何使用JSP实现此模式

Question

I'm new to using JSP and need to figure out how to do this. I'd appreciate any pointers on how to do this ?

I need to display images in this table-like structure. To simplify the problem,

A  B  C
D  E  F
G  H  I

where each of these elements are a part of the Set names in action class.

Set<String> names = new HashSet<String>(0);

names.add("A");
names.add("B");
names.add("C");
names.add("D");
names.add("E");
names.add("F");
names.add("G");
names.add("H");
names.add("I");

Its fairly trivial to do it in java, however, I am having a hard time to figure out, how do I ask the iterator to point to next element manually.

<s:iterator value="names">
 <s:property/>
 I'd now like to point iterator to point to next or run a nested iterator loop here.
</s:iterator>

Answer 1

You can use JSTL forEach loop. You can find a number of examples here .

Answer 2

You can easily accomplish it with JSTL:

<table>
    <tr>
        <c:forEach items="names" var="name" varStatus="i">
            <c:if test="${!i.first && !i.last && i.index % 3 == 0}">
                </tr>
                <tr>
            </c:if>
            <td><c:out value="${name}" /></td>
        </c:forEach>
    </tr>
</table>

Doing so, a new line ( </tr><tr> ) will be added every 3 elements.

(not tested)

Answer 3

As CoolBeans said, you can use JSTL forEach loop.

If you'd like to see an example of that (alongside other good JSTL examples), check out JSTL Examples .

"Iterating over data structures" has some info and examples on what you're trying to do.