标签：json type apply tps reader def NPU lan return
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>Test</title>
<script src="~/Scripts/jquery-3.4.1.js"></script>
<script src="~/Scripts/xlsx.full.min.js"></script>
</head>
<body>
<div style="margin:20px">
<input id="fileExcel" type="file" onchange="getExcelData(this)" style="width: 320px;">
<pre><p style="font-family: sans-serif;"></p></pre>
</div>
<script>
//读取Excel数据
function getExcelData(obj) {
var reader = new FileReader();
//文件加载完成后调用
reader.onload = function (e) {
var data = e.target.result;
//type为buffer时，IE浏览器不兼容xls
//var workbook = XLSX.read(data, {
// type: ‘buffer‘
//});
//兼容IE，需把type改为binary，并对data进行转化
var workbook = XLSX.read(arrayBufferToBinaryString(data), { //手动转化
type: ‘binary‘
});
//获取json格式的Excel数据
var jsonData = XLSX.utils.sheet_to_json(workbook.Sheets[workbook.SheetNames[0]], {
defval: ‘null‘ //单元格为空时的默认值
});
document.querySelector("p").innerHTML = JSON.stringify(jsonData, null, "\t");
//document.querySelector("p").innerHTML = JSON.stringify(jsonDataToCells(jsonData), null, "\t");
};
//加载文件
reader.readAsArrayBuffer(obj.files[0]);
//不兼容IE，该特性是非标准的，请尽量不要在生产环境中使用它！
//reader.readAsBinaryString(file);
}
//ArrayBuffer转BinaryString
function arrayBufferToBinaryString(data) {
var o = "",
l = 0,
w = 10240;
for (; l < data.byteLength / w; ++l) o += String.fromCharCode.apply(null, new Uint8Array(data.slice(l * w, l * w + w)));
o += String.fromCharCode.apply(null, new Uint8Array(data.slice(l * w)));
return o;
}
//转化为交错数组格式(兼容IE)
/*
[
[], //第一行数据
[], //第二行数据
[], //第三行数据
[] //第Ｎ行数据
]
*/
function jsonDataToCells(jsonData) {
var cellsData = []; //用于存储所有数据
var rowData = []; //用于临时存储每行数据
var jsonDataKeys = Object.keys(jsonData[0]);
for (var i = 0; i < jsonData.length; i++) {
//IE不兼容
//cellsData.push(Object.values(jsonData[i]));
for (var j = 0; j < jsonDataKeys.length; j++) {
rowData.push(jsonData[i][jsonDataKeys[j]]);
}
cellsData.push(rowData);
rowData = [];
}
return cellsData;
}
</script>
</body>
</html>
标签：json type apply tps reader def NPU lan return
原文地址：https://www.cnblogs.com/vvull/p/14764568.html
