前端ajxa方法
$.ajax({
type: "post",
dataType:'json',
contentType : 'application/x-www-form-urlencoded;charset=utf-8',
headers:{'X-CSRF-TOKEN':'eaa88ca1-0954-4d4b-b2d3-41bbfa4cd2a5'},
url: "/order/findTradeOrdersForApproval.action",
data: params,
//processData : false,
success: function(data){
注意 contentType 如果是application/json 則後端接收不到參數
contentType : 'application/x-www-form-urlencoded;charset=utf-8',這樣 後端才能接收參數