如何使用struts 2标签比较列表元素（字符串类型）和字符串（在请求范围内）

我的列表包含（“A”，“B”，“C”，“D”）元素

<s:iterator value="lis">
  <s:property /><br>
</s:iterator>

和字符串str =“A”；

<s:property value="%{#request.str}"/>

我想将 list(lis) 的每个元素与 String 进行比较。

随着迭代器状态 http://struts.apache.org/release/2.3.x/struts2-core/apidocs/org/apache/struts2/views/jsp/IteratorStatus.html object:

<s:iterator value="lis" status="ctr">
    <s:property /> 
    <s:if test="%{#request.str.equals(lis[#ctr.index])}">
        -> This value from "lis" is equal to the value of "str"
    </s:if>
    <br/>
</s:iterator>

随着var范围 http://struts.apache.org/release/2.3.x/docs/iterator.html:

<s:iterator value="lis" var="currentValue">
    <s:property /> 
    <s:if test="%{#request.str.equals(#currentValue)}">
        -> This value from "lis" is equal to the value of "str"
    </s:if>
    <br/>
</s:iterator>

随着top关键词：

<s:iterator value="lis">
    <s:property /> 
    <s:if test="%{#request.str.equals(top)}">
        -> This value from "lis" is equal to the value of "str"
    </s:if>
    <br/>
</s:iterator>

You may wanna read the short OGNL Language Guide http://commons.apache.org/proper/commons-ognl/language-guide.html for more details.