如何在JSP表单中使用一个按钮提交2个或更多值

时间:2019-07-14 13:52:39

标签: forms jsp servlets

我有一个表,其中有几行。例如,带有航班预订的表格。要删除一个预订,我需要有客户ID号和航班ID。

考虑到我只有一个按钮尝试将这些值提交给Servlet,我该怎么做?

我尝试隐藏一个按钮,但该解决方案似乎对我不起作用。 我使用request.getParameter()(当然有2个单独的变量)来尝试获取两个值,但最后只捕获了一个,而另一个为null。还有其他想法吗?

这是我的桌子的一个例子。

flight_id    customer_id   
Value 1       Value 2 

表单按钮:

<section class="about-info-area section-gap">
<div class="container">
    <div class="row align-items-center">
        <form method="post" action="/admin_reservations" id="form_reservation"></form>
        <table class="table table-bordered table-striped" style="float: left;">
            <caption style="text-align: center; caption-side: top"><h2>Liste des réservations</h2></caption>
            <thead class="thead-dark">
            <tr>
                <th scope="col">N°Flight</th>
                <th scope="col">N°Client</th>
                <th scope="col">Flight price</th>
            </tr>
            </thead>
            <tbody>
            <% for (Reservation reservation : allReservations) { %>
            <tr>
                <th scope="row"><% out.println(reservation.getFlight().getFlightNum()); %></th>
                <td><% out.println(reservation.getClientNum()); %></td>
                <td><% out.println(reservation.getFlightPrice()); %> €</td>

                <td align="center">
                    <input type="submit" class="btn btn-default btn-sm" name="delete_reservation_client"
                            form="form_reservation" onClick="window.location.reload();" hidden
                            value="<% out.println(reservation.getClientNum()); %>">
                    </input>
                    <button type="submit" class="btn btn-default btn-sm" name="delete_reservation_flight"
                            form="form_reservation" onClick="window.location.reload();"
                            value="<% out.println(reservation.getFlight().getFlightNum()); %>"><span
                            class="glyphicon glyphicon-trash"></span>
                        Delete
                    </button>
                </td>
            </tr>
            <%}%>
            </tbody>
        </table>
    </div>
</div>

还有我的Servlet:

if(request.getParameter("delete_reservation_client")!=null &&request.getParameter("delete_reservation_flight")!=null){
        int delete_reservation_client = Integer.parseInt(request.getParameter("delete_reservation_client").trim());
        int delete_reservation_flight = Integer.parseInt(request.getParameter("delete_reservation_flight").trim());
        System.out.println("Client : " + delete_reservation_client);
        System.out.println("Flight : " + delete_reservation_flight);

        try {
            DBUtils.deleteReservation(conn,delete_reservation_client,delete_reservation_flight);
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

在此先感谢您的帮助。

票价

1 个答案:

答案 0 :(得分:2)

使用button标记代替<a>并附加两个要删除的值。即:

<td align="center">
    <a href="/admin_reservations?delete_reservation_client=<% out.println(reservation.getClientNum()); %>&delete_reservation_flight=<% out.println(reservation.getFlight().getFlightNum()); %>">
    <span class="glyphicon glyphicon-trash"></span>
     Delete
 </a>                  

然后在Servlet中通过写入doGetrequest.getParameter("delete_reservation_client")来通过request.getParameter("delete_reservation_flight")方法获得这些值