table 交替显示色

                            <tr class="${loop.index % 2 == 0 ? 'even' : 'odd'}">
                                <td>${user.whiteLabel}</td>
                                <td><stripes:link beanclass="uma.admin.action.UserEditActionBean">
                                        <stripes:param name="id" value="${user.id}" />
                                        ${user.loginName}
                                    </stripes:link></td>
                                <td><%= roles.getById(user.getRoleId()).getName()%></td>
                                <td><%= statuses.getByStatus(user.getStatus()).getDescription()%></td>
                            </tr>