Datatables 获取ajax返回的数据

Datatables 获取ajax返回的数据
ajaxJson=noticeMainDT.ajax.json();

    noticeMainDT = $("#notice_mainDataTables").DataTable({
        ajax: {
            url: "../wj_news/queryById4DT",
            type: "POST",
            data: function (d) {
                d.search = "";
                d.userId = gLoginInfo.userId;
                d.menuId = noticeMenuId;
                d.orderId = gLoginInfo.roleId;
                d.newsType = 2;
            }
        },
        columns: [{
            data: null,
            targets: 0
        }, {
            data: "newsText",
            render: function (data, type, row) {
                data = data.replace(/<.*?>/ig, "");
                data = data.replace(/ /ig, "");
                data = data.substring(0, 10) + '...';
                return "
" + data + "
";
            }
        }],
        dom: "<'row'<'col-md-4'><'.col-md-8'>r>t<'row'<'col-md-6'><'col-md-6'>>",
        initComplete: function () {
            var noticeJson = noticeMainDT.ajax.json();
        },
        processing: true,
        serverSide: true,
        ordering: false,
        select: false,
        autoFill: true,
        displayLength: 10,
        lengthMenu: [[5, 10, 15, 20, 50, 100, 150, -1], [5, 10, 15, 20, 50, 100, 150, "All"]],
        language: {
            url: "zh_cn.json"
        },
        fnDrawCallback: function () {// 序号自增回调函数
            var api = this.api();
            var startIndex = api.context[0]._iDisplayStart;
            api.column(0).nodes().each(function (cell, i) {
                cell.innerHTML = startIndex + i + 1;
            });
        }
    });