ajax中data传参的两种方式分析

/**
 * 订单取消
 * @return {Boolean} 处理是否成功
 */
function orderCancel(orderId, commant){
  var flag = false;
  $.ajax({
    type: "POST",
    url: "../order/orderCancel.action", //orderModifyStatus
    data: {"orderId":orderId,"commant":commant},
    dataType:"json",
    async:false,
    cache:false,
    success: function(data){
      var member = eval("("+data+")"); //包数据解析为json 格式
      if(member.success=="true"){
        flag = true;
      }else if(member.success=="false") {
        alert(member.info);
      }
    },
    error: function(json){
      alert("订单取消异常，请刷新后重试...");
    }
  });
  hidediv();
  return flag;
}