如何在 JSP 中默认选择选项

Question

I am trying to create a drop down with some value selected by default using the following approach, but this does not works

<a:dropdownOption value="group_${dropdownItem.groupId}" selected="${ ('${dropdownItem.groupName}' == 'All groups')? 'selected': ''}"> ${dropdownItem.groupName} </a:dropdownOption>

Any suggestions on what should be modified in it?

Answer 1

Used the following approach to get this done

<a:dropdownOption value="group_${dropdownItem.groupId}" selected="${dropdownItem.groupName eq 'All groups'? 'true': ''}">

Here, i compared the groupName of drop down item with the desired group name and then assigned true to selected based on if it has the desired group name.