从列表jsp中获取id值

Question

I have view on my jsp like this:

<form:form name = "command" 
         method = "post" 
         action = "withdrawRequest" 
          class = "form-horizontal group-border-dashed" 
          style = "border-radius: 0px;">
<table class = "table table-bordered" 
          id = "datatable-icons" > <!-- start table table-bordered -->
    <thead>
        <tr>
            <th>ID</th>
            <th>NO</th>
            <th>AMOUNT (RP)</th>
            <th>DOCTOR BALANCE (RP)</th>
            <th>DOCTOR ID</th>
            <th>DOCTOR NAME</th>
            <th>TRANSFER ADMIN NAME</th>
            <th>TRANSFER DATE</th>
            <th>TRANSFER REFERENCE</th>
            <th>TRANSFERRED</th>
        </tr>
    </thead>
    <tbody>
        <c:forEach var = "withdrawal" 
                 items = "${listWithdrawals}" 
             varStatus = "loopStatus">
        <tr class="odd gradeX">
            <td>${withdrawal.id}</td>
            <td>${loopStatus.index + 1}</td>
            <td class="text-right"><fmt:formatNumber type="number" maxFractionDigits="2" value="${withdrawal.amount}" /></td>
            <td class="text-right"><fmt:formatNumber type="number" maxFractionDigits="2" value="${withdrawal.doctor_balance}" /></td>
            <td>${withdrawal.doctor_id}</td>
            <td>${withdrawal.doctor_name}</td>
            <td>${withdrawal.transfer_admin_name}</td>
            <td><%-- <fmt:formatDate type="date" value="${withdrawal.transfer_date}" /> --%>${withdrawal.transfer_date}</td>
            <td>${withdrawal.transfer_reference}</td>
            <td class="text-center">
                <c:if test="${withdrawal.transferred == true}">
                    <span class="label label-success">Transferred</span>
                </c:if>
                <c:if test="${withdrawal.transferred == false}">
                    <button class="btn btn-warning btn-sm md-trigger" data-modal="form-primary" type="button">Pending</button>
                </c:if>
                <div class="md-modal colored-header danger custom-width md-effect-9" id="form-primary">
                    <div class="md-content">
                        <div class="modal-header">
                            <h3>Confirm Withdrawal Request</h3>
                            <button type="button" class="close md-close" data-dismiss="modal" aria-hidden="true">&times;</button>
                        </div>
                        <div class="modal-body form">
                            <div class="form-group">
                                <label class="col-sm-3 control-label">Admin Name</label>
                                <div class="col-sm-9">
                                    <input type="text" class="form-control" name="adminName" value="${adminName}">
                                    <input type="text" class="form-control" name="id" value="${withdrawal.id}" />
                                </div>
                            </div>
                            <div class="form-group">
                                <label class="col-sm-3 control-label">Transfer Reference</label>
                                <div class="col-sm-9">
                                    <input type="text" class="form-control" name="transferReference" value="${transferReference}">
                                </div>
                            </div>
                        </div>
                        <div class="modal-footer">
                            <button type="button" class="btn btn-default btn-flat md-close" data-dismiss="modal">Cancel</button>
                            <button type="submit" class="btn btn-danger btn-flat md-close" name="submitRequest">Submit</button>
                        </div>
                    </div>
                </div>
            </td>
        </tr>
        </c:forEach>
    </tbody>
</table>
</form:form>

I cannot get the ID of which button I selected from view,

<input type = "text" 
      class = "form-control" 
       name = "id" 
      value = "${withdrawal.id}" />

If I use this code

String withdrawalId = request.getParameter("id");

The value is always 120. For example:

How do I get the correct ID when I click the modal window?

Answer 1

It seems that the problem is in Nifty Modal Window Effects you are using for popup. It opens modal window for the last row.
It can be fixed with following jsp modifications.

1. Move modal window declaration out of table. Make it single for page. And rename id field to make it unique, eg transferredId
2. Add onclick to buttons opening modal window in order to init it (set transferredId and others) with necessary values

So your form would be (just ending to save space)

                ....
                <td class="text-center">
                ....
                <c:if test="${withdrawal.transferred == false}">
                    <button class="btn btn-warning btn-sm md-trigger" data-modal="form-primary" type="button"
                    onclick="document.getElementById('transferredId').value=${withdrawal.id}">
                    Pending
                    </button>
                </c:if>
            </td>
        </tr>
        </c:forEach>
    </tbody>
</table>
<div class="md-modal colored-header danger custom-width md-effect-9" id="form-primary">
    <div class="md-content">
        <div class="modal-header">
            <h3>Confirm Withdrawal Request</h3>
            <button type="button" class="close md-close" data-dismiss="modal" aria-hidden="true">&times;</button>
        </div>
        <div class="modal-body form">
            <div class="form-group">
                <label class="col-sm-3 control-label">Admin Name</label>
                <div class="col-sm-9">
                    <input type="text" class="form-control" name="adminName" value="${adminName}">
                    <input type="text" class="form-control" name="transferredId" id="transferredId" />
                </div>
            </div>
            <div class="form-group">
                <label class="col-sm-3 control-label">Transfer Reference</label>
                <div class="col-sm-9">
                    <input type="text" class="form-control" name="transferReference">
                </div>
            </div>
        </div>
        <div class="modal-footer">
            <button type="button" class="btn btn-default btn-flat md-close" data-dismiss="modal">Cancel</button>
            <button type="submit" class="btn btn-danger btn-flat md-close" name="submitRequest">Submit</button>
        </div>
    </div>
</div>

After that String withdrawalId = request.getParameter("transferredId"); will return correct id.

Answer 2

Check the generated HTML. Looks to me that it contains listWithdrawals.length instances of that <input and all of them have the same name.

request.getParameter("id") is going to return a single value, not a list of all the values. What you need is request.getParamaterValues("id") that is going to return all of them.

This is because when the form is submitted all those input values are going to be sent.

So the simple solution (with no JavaScript magic) is to get all the lists of values with request.getParamaterValues and deal with everything that changed. ids[0] and transferReferences[0] would be the needed values for the first item in listWithdrawals :

String[] ids = request.getParamaterValues("id");
String[] transferReferences = request.getParamaterValues("transferReference");

for (int i = 0; i < ids.length; i++) {
    System.out.println(ids[i]);
    System.out.println(transferReferences[i]);
}

Another solution would be to generate unique names for each input/item in listWithdrawals :

<c:forEach var="withdrawal" items="${listWithdrawals}" varStatus="loopStatus">
    <input type="text" class="form-control" name="${'transferReference_'.concat(withdrawal.id)}" value="${withdrawal.id}" />
</c:forEach>

And then you'd be able to access the transferReference value of a withdrawal with ID 119 like this:

request.getParameter("transferReference_119")

Answer 3

请原谅我没有将其添加为评论，因为我不能，因为我仍然没有 50 声望（仍然是 16），我只是想让您测试一些东西，尝试刷新页面，然后打开 ID 为 119 的行，例如首先时间，我的意思是任何 Id 而不是 120，看看会发生什么，如果您第一次打开的值仍然存在，那么问题不在 id 120 中，问题是您可以使用 if not null 来设置值一些地方，所以第一次它将为空并将值添加到它，但下次它已经有一个值所以你不能改变它，如果你这样做后你不能解决问题，请上传您的控制器，以便我们检测问题