解决layui框架自带的excel导出长数据变科学计数法

我们只要去修改layui原来自带的导出方法就可以，去设置
按照下面步骤

  , cols: [
        [
          {type: 'checkbox', fixed: 'left'},
          {field: 'lineNo', title: '线路号', sort: true},
          {field: 'lineName', title: '线路名', sort: true},
          {field: 'busNo', title: '车辆号', sort: true},
          {field: 'ridingTime', title: '日期', sort: true, templet: function(d){return d.ridingTime+"\t"}},
          {field: 'cardNo', title: '卡号', sort: true, templet: function(d){return d.cardNo+"\t"}},
          {field: 'name', title: '姓名', sort: true},
          {field: 'idNo', title: '身份证', sort: true, templet: function(d){return d.idNo+"\t"}},
          {field: 'telNo', title: '电话', sort: true, templet: function(d){return d.telNo+"\t"}},
          {field: 'cardCategory', title: '刷卡类型', sort: true},
          { 120, toolbar: "#tool", title: '操作'}
        ]
      ]

加上templete: function(d){return d.cardno+'t'}

1、在layui/lay/modules/table.js中搜索：d.exportFile，不出意外就是第二个，对比一下代码

2、将d.exportFile这个函数，用下面内容替换掉：

        d.exportFile = function (e, t, i) {
                t = t || d.clearCacheKey(d.cache[e]), i = i || "csv";
                var a = c.config[e] || {},  // 分页按钮
                    l = {csv: "text/csv", xls: "application/vnd.ms-excel"}[i], // meta格式
                    n = document.createElement("a"), // a 标签
                    type = i,
                    meta = l,
                    title = a.title
 
                layui.each(t, function (ks, vs) {
                    var inner = {}
                    layui.each(vs, function (k, v) {
                        if (/^\d{9,}$/.test(v)) {
                            vs[k] = vs[k] + '\t'
                        }
                        inner[k] = vs[k]
                    });
                    t[ks] = inner
                })
                if (r.ie) {
                    var i = [], a = [];
                    layui.each(t, function (t, l) {
                        var n = [];
                        "object" == typeof e ? (layui.each(e, function (e, a) {
                            0 == t && i.push(a || "")
                        }), layui.each(d.clearCacheKey(l), function (e, t) {
                            n.push(t)
                        })) : d.eachCols(e, function (e, a) {
                            a.field && "normal" == a.type && !a.hide && (0 == t && i.push(a.title || ""),               n.push(l[a.field]))
                        }), a.push(n.join(","))
                    });
                    var data = i.join(",") + "\r\n" + a.join("\r\n")
                    navigator.msSaveBlob(new Blob(['\ufeff' + data], {type: meta + ';charset=utf-8;'}), title + '.' + type)
                } else {
                    return n.href = "data:" + l + ";charset=utf-8,\ufeff" + encodeURIComponent(function () {
                        var i = [], a = [];
                        return layui.each(t, function (t, l) {
                            var n = [];
                            "object" == typeof e ? (layui.each(e, function (e, a) {
                                0 == t && i.push(a || "")
                            }), layui.each(d.clearCacheKey(l), function (e, t) {
                                n.push(t)
                            })) : d.eachCols(e, function (e, a) {
                                a.field && "normal" == a.type && !a.hide && (0 == t && i.push(a.title || ""), n.push(l[a.field]))
                            }), a.push(n.join(","))
                        }), i.join(",") + "\r\n" + a.join("\r\n")
                    }()), n.download = (a.title || "table_" + (a.index || "")) + "." + i, document.body.appendChild(n), n.click(), void document.body.removeChild(n)}
            },

https://blog.csdn.net/Y_R_Q/article/details/109049246

https://toscode.gitee.com/sentsim/layui/issues/I1VMKN