关于前端将json数据导出为Excel格式并下载
2019-04-16 本文已影响0人
旧时袋
总体思路就是json数据的key，value跟Excel的行列转换，还有就是解决数据在Excel表格中存放的位置，区域问题。
这里要用到的两个小插件，一个是xslx.js，一个是FileSaver.js，前者是来处理生成Excel的，后者是用来把文件下载保存到本地的。
下载地址：
https://github.com/eligrey/FileSaver.js
https://github.com/SheetJS/js-xlsx/tree/028d7010a516383cb9a2fdd0f0a919392e77600a/demos/angular
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>导出生成excel</title>
<script src="js/xlsx.full.min.js"></script>
<script src="js/FileSaver.min.js"></script>
</head>
<body>
<button onclick="downloadExl(students)">导出</button>
<script>
var students = [{
"name": "小明1",
"age": "6",
"sex": "男",
"height": "60"
}, {
"name": "小明2",
"age": "7",
"sex": "男",
"height": "70"
}, {
"name": "小明3",
"age": "8",
"sex": "男",
"height": "80"
}];
function downloadExl(data, type) {
var keys = Object.keys(data[0]);
var firstRow = {};
keys.forEach(function (item) {
firstRow[item] = item;
});
data.unshift(firstRow);
var content = {};
// 把json格式的数据转为excel的行列形式
var sheetsData = data.map(function (item, rowIndex) {
return keys.map(function (key, columnIndex) {
return Object.assign({}, {
value: item[key],
position: (columnIndex > 25 ? getCharCol(columnIndex) : String.fromCharCode(65 + columnIndex)) + (rowIndex + 1),
});
});
}).reduce(function (prev, next) {
return prev.concat(next);
});
sheetsData.forEach(function (item, index) {
content[item.position] = { v: item.value };
});
//设置区域,比如表格从A1到D10,SheetNames:标题，
var coordinate = Object.keys(content);
var workBook = {
SheetNames: ["helloSheet"],
Sheets: {
"helloSheet": Object.assign({}, content, { "!ref": coordinate[0] + ":" + coordinate[coordinate.length - 1] }),
}
};
//这里的数据是用来定义导出的格式类型
var excelData = XLSX.write(workBook, { bookType: "xlsx", bookSST: false, type: "binary" });
var blob = new Blob([string2ArrayBuffer(excelData)], { type: "" });
saveAs(blob, "hello.xlsx");
}
//字符串转字符流
function string2ArrayBuffer(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;
}
// 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>
</body>
</html>
纯属借鉴 出处：https://www.cnblogs.com/absolute-child/p/8083129.html
