// 解决不同浏览器下载文件名称乱码var userAgent = (req.headers[‘user-agent‘]||‘‘).toLowerCase();res.set(‘Content-Type‘, ‘application/octet-stream;charset=utf-8‘);if(userAgent.indexOf(‘msie‘) >= 0 || userAgent.indexOf(‘chrome‘) >= 0) {    res.setHeader(‘Content-Disposition‘, ‘attachment; filename=‘ + encodeURIComponent(filename));} else if(userAgent.indexOf(‘firefox‘) >= 0) {    res.setHeader(‘Content-Disposition‘, ‘attachment; filename*="utf8\‘\‘‘ + encodeURIComponent(filename)+‘"‘);} else {    res.setHeader(‘Content-Disposition‘, ‘attachment; filename=‘ + new Buffer(filename).toString(‘binary‘));}// 解决excel打开内容乱码var dataBuffer = Buffer.concat([new Buffer(‘\xEF\xBB\xBF‘, ‘binary‘), new Buffer(data)]);res.send(dataBuffer);