在表单中有多个提交按钮，并确定在控制器中按下了哪些按钮 [英] Have multiple submit buttons in a form and determine which was pressed in a controller

问题描述

在我的Spring应用程序中，我有一个jsp，它有一个表单，我希望有多个提交按钮转到同一个控制器。我需要能够确定控制器中按下了哪个按钮。表单向用户显示多个项目，他们可以选择其中一个项目，唯一的区别是所选项目的ID。

In my Spring application, I have a jsp that has a form where I want to have multiple submit buttons that go to the same controller. I need to be able to determine which button was pressed in the controller. The form displays a number of items to the user and they can select one of the items with the only difference being the ID of the selected item.

在jsp中，我我正在创建这样的表单：

In the jsp, I'm creating the form like this:

<form:form method="post" commandName="myCommand">

    <c:forEach items="${model.availableitems}" var="item">
      <span class="item">${item.description}</span> 
      <input type="hidden" name="id" value="${item.ID}"/>
      <input type="submit" name="SelectButton" value="Select" />
    </c:forEach>

  </div> 
</form:form>

然而，这会在日志中给出一个数据绑定错误：1消息，表格不是没有提交给控制器。

However, this gives me a "Data binding errors: 1" message in the log and the form isn't submitted to the controller.

我尝试将myCommand.id从int更改为String，但是提交时的值是id1，id2，id3 ......（所有ID在逗号分隔列表中）无法确定按下了哪个按钮。我不希望必须为每个按钮指定不同的操作，因为项目数量可以增长，并且它们的操作完全相同，只是使用不同的ID。

I tried changing the myCommand.id from an int to a String, but then the value when it's submitted is id1,id2, id3... (all of the IDs in a comma delimited list) with no way of determining which button was pressed. I don't want to have to specify different actions for each button as the number of items can grow, and the action for them is all the same, just with a different ID.

如何在此表单中有多个按钮并获取控制器中的值？

How can I have multiple buttons in this form and get the value in the controller?

推荐答案

为什么不为每个项目使用单独的表格？

Why not just use a separate form for each item?

<c:forEach items="${model.availableitems}" var="item">
  <form:form method="post" commandName="myCommand">
    <span class="item">${item.description}</span> 
    <input type="hidden" name="id" value="${item.ID}"/>
    <input type="submit" name="SelectButton" value="Select" />
  </form:form>        
</c:forEach>

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