< s:select>具有动态列表名称 [英] <s:select> with dynamic list name
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问题描述
我要遍历包含<s:select>
列表源名称的字符串列表,但是HTML输出不是预期的:它是显示的列表名称,而不是内容
I want to iterate over a list of strings containing names for <s:select>
list source, but the HTML output is not as expected : it's the name of the list that is display, not the content.
我的Action
代码:
My Action
code:
public class DescriptionTabArchiveAction extends ActionSupport {
private List<String> vegetables = new ArrayList<String>();
private List<String> devices = new ArrayList<String>();
// contain "vegetables" and "devices".
private List<String> selectList = new ArrayList<String>();
@Action("multipleSelect")
public String multipleSelect() {
vegetables.add("tomato");
vegetables.add("potato");
devices.add("mouse");
devices.add("keyboard");
selectList.add("vegetables");
selectList.add("devices");
return SUCCES;
}
// getters and setters
}
JSP:
<s:iterator value="selectList" var="listName">
<s:select list="%{#listName}" />
<!-- I tried with this line too : same behaviour. -->
<%-- <s:select list="#listName" /> --%>
</s:iterator>
我得到的(HTML输出):
<select name="" id="">
<option value="vegetables">vegetables</option>
</select>
<select name="" id="">
<option value="devices">devices</option>
</select>
我期望的内容(HTML输出):
<select name="" id="">
<option value="tomato">tomato</option>
<option value="potato">potato</option>
</select>
<select name="" id="">
<option value="mouse">mouse</option>
<option value="keyboard">keyboard</option>
</select>
我的问题:
如何动态遍历字符串列表以使多个<s:select>
具有不同的列表源?
How can I dynamically iterate over a list of string to have multiple <s:select>
with different list source?
推荐答案
使用Map
代替List
private Map<String, List<String>> selectMap = new HashMap<>();
//getter and setter here
@Action("multipleSelect")
public String multipleSelect() {
vegetables.add("tomato");
vegetables.add("potato");
devices.add("mouse");
devices.add("keyboard");
selectMap.put("vegetables", vegetables);
selectMap.put("devices", devices);
return SUCCESS;
}
修改迭代器以使用地图
<s:iterator value="selectMap">
<s:select list="%{value}" />
...
</s:iterator>
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