<html lang="en">
<head>
<meta charset="UTF-8">
<title></title>
<script src="https://cdn.bootcss.com/jquery/1.10.2/jquery.min.js"></script>
<script src="http://oss.sheetjs.com/js-xlsx/xlsx.full.min.js"></script>
</head>
<body>
<input type="file" id="excel-file"><br />
<button onclick="downloadExl(persons)">导出</button>
<a href="" download="这里是下载的文件名.xlsx" id="hf"></a>
</body>
</html>
<script>
var persons=[];
$('#excel-file').change(function (e) {
var files = e.target.files;
var fileReader = new FileReader();
fileReader.onload = function (ev) {
try {
var data = ev.target.result,
workbook = XLSX.read(data, {
type: 'binary'
}); // 以二进制流方式读取得到整份excel表格对象
persons = []; // 存储获取到的数据
} catch (e) {
console.log('文件类型不正确');
return;
}
// 表格的表格范围，可用于判断表头是否数量是否正确
var fromTo = '';
// 遍历每张表读取
for (var sheet in workbook.Sheets) {
if (workbook.Sheets.hasOwnProperty(sheet)) {
fromTo = workbook.Sheets[sheet]['!ref'];
console.log(fromTo);
persons = persons.concat(XLSX.utils.sheet_to_json(workbook.Sheets[sheet]));
// break; // 如果只取第一张表，就取消注释这行
}
}
console.log(persons);
// var headStr = '姓名,性别,年龄,学校';
// for (var i = 0; i < persons.length; i++) {
// if (Object.keys(persons[i]).join(',') !== headStr) {
// persons.splice(i, 1);
// }
// }
// console.log(persons);
};
// 以二进制方式打开文件
fileReader.readAsBinaryString(files[0]);
});
var tmpDown; //导出的二进制对象
function downloadExl(json, type) {
var tmpdata = json[0];
json.unshift({});
var keyMap = []; //获取keys
//keyMap =Object.keys(json[0]);
for (var k in tmpdata) {
keyMap.push(k);
json[0][k] = k;
}
var tmpdata = [];//用来保存转换好的json
json.map((v, i) => keyMap.map((k, j) => Object.assign({}, {
v: v[k],
position: (j > 25 ? getCharCol(j) : String.fromCharCode(65 + j)) + (i + 1)
}))).reduce((prev, next) => prev.concat(next)).forEach((v, i) => tmpdata[v.position] = {
v: v.v
});
var outputPos = Object.keys(tmpdata); //设置区域,比如表格从A1到D10
var tmpWB = {
SheetNames: ['mySheet'], //保存的表标题
Sheets: {
'mySheet': Object.assign({},
tmpdata, //内容
{
'!ref': outputPos[0] + ':' + outputPos[outputPos.length - 1] //设置填充区域
})
}
};
tmpDown = new Blob([s2ab(XLSX.write(tmpWB,
{bookType: (type == undefined ? 'xlsx':type),bookSST: false, type: 'binary'}//这里的数据是用来定义导出的格式类型
))], {
type: ""
}); //创建二进制对象写入转换好的字节流
var href = URL.createObjectURL(tmpDown); //创建对象超链接
document.getElementById("hf").href = href; //绑定a标签
document.getElementById("hf").click(); //模拟点击实现下载
setTimeout(function() { //延时释放
URL.revokeObjectURL(tmpDown); //用URL.revokeObjectURL()来释放这个object URL
}, 100);
}
function s2ab(s) { //字符串转字符流
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;
}
// 将指定的自然数转换为26进制表示。映射关系：[0-25] -> [A-Z]。
function getCharCol(n) {
let temCol = '',
s = '',
m = 0
while (n > 0) {
m = n % 26 + 1
s = String.fromCharCode(m + 64) + s
n = (n - m) / 26
}
return s
}
</script>
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