form 传到后台的role对象取不到Name值

<form:form id="choiceForm" modelAttribute="role"
        action="${ctx}/qae/qaeMaintain/findRoleList" method="get"
        class="form-horizontal" autocomplete="off">
        <sys:message content="${message}" />
        <div id="ul_center" style="width: 100%">
            <table class="table table-bordered" id="addtr">
                <tr>
                    <th id="tooitip_th_two" colspan="6" style="cursor: pointer;"
                        onclick=""><span
                        style="color: #333333; font-size: 20px; vertical-align: middle;">选择角色</span>
                    </th>
                </tr>
                <tbody id="tbodytwo">
                    <tr>
                        <td class="trtdclass"><label>角色名</label><font color="red"
                            style="font-size: 20px">*</font></td>
                        <td style="text-align: left; width: 242px;"><input
                            name="enname" id="t0a" type="hidden"
                            style="width: 90%; margin-bottom: 0px;"> <select id="e0a"
                            class='input-medium select' style="width: 92%"
                            onchange="submitForm()">
                                <option value=''></option>
                                <c:forEach var="roleLists" items="${roleLists}">
                                    <option value="${roleLists.enname}">${roleLists.enname}</option>
                                </c:forEach>
                        </select></td>
                        <td style="text-align: center; margin-bottom: 0px;"><input
                            id="choiceSubmit" class="btn btn-primary" type="submit" value="查找">
                        </td>
                    </tr>
                </tbody>
            </table>
        </div>
    </form:form>

这个先打印前端传到后端的json数据是否完整，然后看是前端的问题还是后端封装的问题