Accessing list-backed properties in JSP

Question

Hello guys,
I am trying to generate a dynamic form using the list-backed properties following the guide in
http://struts.apache.org/struts-action/userGuide/building_controller.html#map_action_form_classes
It works as a map but can't make it work as a list
here is my jsp
<html:form action ="/addTemplate.do">
     <%List attributesList = (List) request.getAttribute("attributesList");
                    Integer count = new Integer(attributesList.size());
                    session.setAttribute("count", count);
                    session.setAttribute("attributesList", attributesList);
                    for (int i = 0; i <= count; i++) {
                         String name = "value(addTemplate-" + i + ")";
     %>
<!--make a list-->
          Attribute<%=i%>
                    <html:text property="<%= name %>"/>
          <br/>
          <%}%>
          <html:submit/>
          </html:form>and my bean
public class AddTemplateForm extends ActionForm {
    private final Map values = new HashMap();
    public void setValue(String key, Object value) {
        values.put(key, value);
    public Object getValue(String key) {
        return values.get(key);
}when I am trying to use a list , obviously modifying the bean and my jsp to
String name = "value[" + i + ")";I am getting
javax.servlet.ServletException: Exception thrown by getter for property value[0] of bean org.apache.struts.taglib.html.BEANusing a map I don;t really know how to get the properties values in the Action class
Any help is appreciated

Answer 1

try this.
<html:select property="selectedCountries" multiple="true" size="4">
<html:optionsCollection property="availableCountries" label="name" value="id">
</html:select>
public OptionsRecord
// make corresponding setters and getters
private String name;
private String id;
// constructor
public OptionsRecord(String nm, String idd)
name = nm;
id = idd;
----- Form class ----
public TestForm extends ActionForm
// make setters and getters for the following.
private String[] selectedCountries = new String[0];
private Collection availableCountries = new LinkedList();
init()
availableCountries.add(new OptionsRecord("Australia", "001"));
availableCountries.add(new OptionsRecord("Burma", "002"));
availableCountries.add(new OptionsRecord("USA", "003"));
Don't forget to reset selectedCountries to a new object.
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