前端js处理导出表格

引入js/xlsx.core.min.js

//导出
function exportExcel() {
    var row = $("#dgItemList").bootstrapTable("getSelections");

    if (row == null || row == undefined || row.length == 0) {
        toastr.warning("请先选择要导出的数据！");
        return;
    }

    var name = row[0].RecordCode;  //委托单位

    var csv = table2csv('#dgItemList');
    var sheet = csv2sheet(csv);
    var blob = sheet2blob(sheet);
    openDownloadDialog(blob, name + '.xlsx');
}

//获取表格数据
function table2csv(table) {
    var csv = [];

    var temp = [];
    //获取表头
    $(table).find('thead tr').each(function () {
        $(this).find('th').each(function () {
            temp.push($(this).text());
        })

        temp.shift(); // 移除第一个
        csv.push(temp.join('、'));
    });

    //获取表格内容
    $(table).find('tr').each(function (index, item) {
        var temp1 = [];

        $(this).find('td').each(function () {
            if ($(this).html().indexOf('input') > 0)
                temp1.push($(this).children('input').val())
            else
                temp1.push($(this).text());

        })
        temp1.shift(); // 移除第一个
        csv.push(temp1.join('、'));
    });
    csv.splice(1, 1);//删除第二个空字符串
    //csv.shift();
    return csv.join('\n');
}

// csv转sheet对象
function csv2sheet(csv) {
    var sheet = {}; // 将要生成的sheet
    csv = csv.split('\n');
    csv.forEach(function (row, i) {
        row = row.split('、');
        row.splice(row.length - 1, 1);   //删除最后一列操作列
        row.splice(0, 1);   //删除第一列状态列
        if (i == 0) sheet['!ref'] = 'A1:' + String.fromCharCode(65 + row.length) + (csv.length);
        row.forEach(function (col, j) {
            sheet[String.fromCharCode(65 + j) + (i + 1)] = { v: col };
        });
    });

    //设置列宽
    sheet['!cols'] = [{ wch: 20 }, { wch: 20 }, { wch: 30 }, { wch: 20 }, { wch: 15 }, { wch: 20 }, { wch: 10 }, { wch: 15 }, { wch: 10 }, { wch: 30 }, { wch: 15 }, { wch: 10 }, { wch: 10 }, { wch: 10 }, { wch: 20 }];

    return sheet;
}

// 将一个sheet转成最终的excel文件的blob对象，然后利用URL.createObjectURL下载
function sheet2blob(sheet, sheetName) {
    sheetName = sheetName || 'sheet1';
    var workbook = {
        SheetNames: [sheetName],
        Sheets: {}
    };
    workbook.Sheets[sheetName] = sheet;
    // 生成excel的配置项
    var wopts = {
        bookType: 'xlsx', // 要生成的文件类型
        bookSST: false, // 是否生成Shared String Table，官方解释是，如果开启生成速度会下降，但在低版本IOS设备上有更好的兼容性
        type: 'binary'
    };
    var wbout = XLSX.write(workbook, wopts);
    var blob = new Blob([s2ab(wbout)], { type: "application/octet-stream" });
    // 字符串转ArrayBuffer
    function s2ab(s) {
        var buf = new ArrayBuffer(s.length);
        var view = new Uint8Array(buf);
        for (var i = 0; i != s.length; ++i) view[i] = s.charCodeAt(i) & 0xFF;
        return buf;
    }
    return blob;
}

function openDownloadDialog(url, saveName) {
    if (typeof url == 'object' && url instanceof Blob) {
        url = URL.createObjectURL(url); // 创建blob地址
    }
    var aLink = document.createElement('a');
    aLink.href = url;
    aLink.download = saveName || ''; // HTML5新增的属性，指定保存文件名，可以不要后缀，注意，file:///模式下不会生效
    var event;
    if (window.MouseEvent) event = new MouseEvent('click');
    else {
        event = document.createEvent('MouseEvents');
        event.initMouseEvent('click', true, false, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null);
    }
    aLink.dispatchEvent(event);
}