checkbox的全选与action的处理

jsp:
<form action="myaction/listAction_getCB.do">
<input type="checkbox" name="cb1" value="id1"/><br>
<input type="checkbox" name="cb1" value="id2"/><br>
<input type="submit" value="提 交">
</form>

action:
String[] cb = request.getParameterValues("cb1");
for(int i=0;i<cb.length;i++){
Integer cell = Integer.parseInt(cb[i]);
......
}