getParameter returning the same value

Question

I have a table where there’s a column

ID - NAME - ACTION
1 -- USU1 -- VER
2 -- USU2 -- VER
3 -- USU3 -- VER

in JSP I am storing the id inside a Hidden input.

<input type="hidden" value="${operador.id }" name="idOperador"/>

In Java I call this value through

int id = Integer.parseInt(request.getParameter("idOperador"));

Only independent of the item I click on "VIEW", it is taking the value of the first row of the table. In this case the id "1" or the first of the next pages.

Some guidance ?

Part of the code: This is within a table, where one of the columns (actions) consists of the action buttons (view, change and delete). When selecting the change option, it is taking the id of the first row of the table.

Note: this inside a foreach (JSTL)

<td class="actions">
   <input type="hidden" value="${operador.id }" name="idOperador"/>
   <div align="center">
      <div class="btn-group" role="group">
      <button type="button" class="btn bg-cyan waves-
      effect">Visualizar</button>
      <button type="submit" name="command" value="DadosAlterarOperador" 
      class="btn bg-cyan waves-effect">Alterar</button>
      <button type="button" class="btn btn-danger waves-
      effect">Excluir</button>
   </div>
 </div>
</td>

Answer 1

In this example I do not get several "ids" but the one I click on the respective button.

His ID is saved to the JSP foreach and then picked up a single ID with getParameter in Java.

Answer 2

The method getParameter() return only the first element found. In your case as is a list of elements the ideal is to use the method getParameterValues()

//o metodo retorna um array de Strings
String[] ids = request.getParameterValues("idOperador");

for(int i = 0;i < ids.length; i++)
{
   //pega o id desejado da lista
   int id = Integer.parseInt(ids[i]);
}