One option to solve your problem is :
if possible use JavaScript to make the selected entries true for the multiple entries u had made in that select list.

make it selected by using Java-script first by calling javascript function before any action OR with that action . Pass your HTML:SELECT property (name) to this function:

function callselectAll(selectName)
{
var i;
for(i=0;i {
document.getElementById(selectName).options[i].selected = true;
}
}

And use string [] array name as a property name for that html:select property form bean property.And the name of that array as a property of that html:select in jsp page.

You will ultimatly gate the all selected values un the that string array of form bean.Thus u get the selected entries.

One option to solve your problem is :
if possible use JavaScript to make the selected entries true for the multiple entries u had made in that select list.

make it selected by using Java-script first by calling javascript function before any action OR with that action :

function callselectAll(selectName)
{
var i;
for(i=0;i {
document.getElementById(selectName).options[i].selected = true;
}
}

And use string [] array name as a property name for that html:select property form bean property.And the name of that array as a property of that html:select in jsp page.

You will ultimatly gate the all selected values un the that string array of form bean.

In the Action Class,
someVector.add(new LabelValueBean("someString","someString))
request.setAttribute("files",someVector);

In the Action Form,
private String[] _nameArray;
	public String[] getVectList() {
		return this._nameArray;
	}
	public void setVectList(String[] vecList) {
		this._nameArray = vecList;
	}

In the JSP,Try this