jsp-dropdownlist

Question

hi i have one doubt.how to diplay array values inside drop down list

Answer 1

You can use JSTL <c:forEach> tag for this. If you don't have JSTL installed yet, just drop jstl-1.2.jar in /WEB-INF/lib. Then, in top of your JSP declare the JSTL code taglib as per its documentation:

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>

Then, there where you need to populate the dropdown options, use <c:forEach> to iterate over an array like String[] or a collection like List<String> in the scope. E.g.

<select name="country">
    <c:forEach items="${countries}" var="country">
        <option value="${country}">${country}</option>
    <c:forEach>
</select>

If you want to have separate option value-label pairs, then rather use a Map<String, String> instead which you can iterate like follows:

<select name="country">
    <c:forEach items="${countries}" var="country">
        <option value="${country.key}">${country.value}</option>
    <c:forEach>
</select>

The ${map.key} returns the map's key and the ${map.value} returns the map's value.