struts2dropdownstruts-tags

How to use <s:select> tag to show keys from a Map and return values to the action in Struts 2?

I have a Map with key-value pairs. I want to display the key on a dropdown, and value to be sent to the server for identifying what is selected.

I am using Struts 2. I tried putting the Map in <s:select> tag's list attribute, however it shows the values in the dropdown.

Solution

Use listKey and listValue attributes of <s:select> tag to get properties from list of objects.

In order to swap keys and values in map put value in listKey and key in listValue.

<s:select list="someMap" listKey="value" listValue="key"/>