I have a web page that displays check boxes for user
to make multiple selection:
[code]
<html-el:form action="/message/SelectAndMail">
......
......
<td>
<html-el:checkbox
property="recipients[${status.index}].selected" />
</td>
<td>
<html-el:hidden
property="recipients[${status.index}].emailAddress" />
<c:out value="${recipientBean.emailAddress}" />
</td>
......
......
</html:el>
[/code]
For testing purpose, I made 6 selections of e-mail
addresses among all check boxes displayed, Those 6
e-mail addresses are my friends'.
Then, the SelectRecipientForm.java extends the
ActionForm class. In the ActionForm class, the
multiple selection of check boxes by users are
supposed to populate a String Array.
However, the values of the selected check boxes are
not picked up. Here is the code of the
SelectRecipientsForm.java:
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionForm;
public class selectRecipientsForm extends ActionForm
{
// Map of RecipientField objects.
private Map recipientFieldMap = new HashMap();
private String[] recipients = new String[0];
private String[] selectedEmailAddresses;
public RecipientField getRecipients( int index )
{
RecipientField recipientField = (
RecipientField ) recipientFieldMap.get( new Integer(
index ) );
if ( recipientField == null )
{
recipientField = new RecipientField();
recipientFieldMap.put( new Integer( index ),
recipientField );
}
return recipientField;
}
public String[] getSelectedEmailAddresses()
{
List theEmailAddressList = new ArrayList();
Iterator i =
recipientFieldMap.values().iterator();
while( i.hasNext() )
{
RecipientField recipientField = (
RecipientField ) i.next();
if ( recipientField.isSelected() )
{
theEmailAddressList.add( "\"" +
recipientField.getEmailAddress() + "\"" );
}
}
return ( String[] )theEmailAddressList.toArray(
new String[theEmailAddressList.size()] );
}
public void reset( ActionMapping mapping,
HttpServletRequest request)
{
recipients = new String[0];
selectedEmailAddresses = new String[0];
}
}
Of course, I have this RecipientField.java:
public class RecipientField
{
private String emailAddress = "";
public String getEmailAddress()
{
return emailAddress;
}
public void setEmailAddress( String newValue )
{
emailAddress = newValue;
}
private boolean selected = false;
public boolean isSelected()
{
return selected;
}
public void setSelected( boolean newValue )
{
selected = newValue;
}
}
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