binding to a Set in Spring

Question

If I have a list object I know that I can bind class property fields to form using the code below.

<c:forEach items="${items}" var="i" varStatus="itemsRow">
   <input name="items[${itemsRow.index}].fieldName" type="text"/>
</c:forEach> <form:errors path="items" />

What do I do if the property is a Set object. I have read about initBinder in the Controller class but it does not work. Can anyone paste code here to accomplish this??

Answer 1

You need to use the checkbox control:

<form:form>
      <table>
          <tr>
              <td>Interests:</td>
              <td>
                  <%-- Approach 2: Property is of an array or of type java.util.Collection --%>
                  Quidditch: <form:checkbox path="preferences.interests" value="Quidditch"/>
                  Herbology: <form:checkbox path="preferences.interests" value="Herbology"/>
                  Defence Against the Dark Arts: <form:checkbox path="preferences.interests"
                      value="Defence Against the Dark Arts"/>
              </td>
          </tr>
      </table>
  </form:form>

See more at the documentation