ajax 传递数组参数

var req = {
    ids: [1, 2, 3]
}
$.ajax({
    url: ‘/.../delete-by-ids‘,
    type: ‘post‘,
    data: JSON.stringify(req),
    dataType: ‘json‘,
    contentType: "application/json",
    traditional:true,
    success: function (data) {
        callback(data);
    },
    error: function (data) {
        $.dialog("错误");
    }
})