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本文实例讲述了纯JS实现的读取excel文件内容功能。分享给大家供大家参考，具体如下：
template.html
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JS-XLSX Live Demo</title>
<link href="../css/bootstrap.min.css" rel="external nofollow" rel="stylesheet">
<style>
#drop{
border:2px dashed #bbb;
-moz-border-radius:5px;
-webkit-border-radius:5px;
border-radius:5px;
padding:25px;
text-align:center;
font:20pt bold,"Vollkorn";color:#bbb
}
#b64data{
width:100%;
}
a { text-decoration: none }
button{}
</style>
</head>
<body>
<pre>
<input type="file" name="xlfile" id="xlf">
<button type="button" class="btn btn-danger"><a href="Techrecord.html" rel="external nofollow" rel="external nofollow" >返回</a></button>
<input type="checkbox" name="useworker" checked="" style="display: none;">
<input type="checkbox" name="xferable" checked="" style="display: none;">
<input type="checkbox" name="userabs" checked="" style="display: none;">
</pre>
<button class="submit_all">提交</button>
<pre id="out"></pre>
<br>
<script src="/UploadFiles/2021-04-02/jquery.js">
myexcel.js
/*jshint browser:true */
/*global XLSX */
var X = XLSX;
var XW = {
/* worker message */
msg: 'xlsx',
/* worker scripts */
rABS: '../js/xlsxworker2.js',
norABS: '../js/xlsxworker1.js',
noxfer: '../js/xlsxworker.js'
};
function ab2str(data) {
var o = "", l = 0, w = 10240;
for(; l<data.byteLength/w; ++l) o+=String.fromCharCode.apply(null,new Uint16Array(data.slice(l*w,l*w+w)));
o+=String.fromCharCode.apply(null, new Uint16Array(data.slice(l*w)));
return o;
}
function s2ab(s) {
var b = new ArrayBuffer(s.length*2), v = new Uint16Array(b);
for (var i=0; i != s.length; ++i) v[i] = s.charCodeAt(i);
return [v, b];
}
function xw_xfer(data, cb) {
var worker = new Worker(rABS "\\n").replace(/\r/g,"\\r");cb(JSON.parse(xx)); break;
}
};
if(rABS) {
var val = s2ab(data);
worker.postMessage(val[1], [val[1]]);
} else {
worker.postMessage(data, [data]);
}
}
function xw(data, cb) {
transferable = document.getElementsByName("xferable")[0].checked;
if(transferable) xw_xfer(data, cb);
else xw_noxfer(data, cb);
}
function get_radio_value( radioName ) {
var radios = document.getElementsByName( radioName );
for( var i = 0; i < radios.length; i++ ) {
if( radios[i].checked || radios.length === 1 ) {
return radios[i].value;
}
}
}
function to_json(workbook) {
var result = {};
workbook.SheetNames.forEach(function(sheetName) {
var roa = X.utils.sheet_to_row_object_array(workbook.Sheets[sheetName]);
if(roa.length > 0){
result[sheetName] = roa;
}
});
return result;
}
var tarea = document.getElementById('b64data');
function b64it() {
if(typeof console !== 'undefined') console.log("onload", new Date());
var wb = X.read(tarea.value, {type: 'base64',WTF:wtf_mode});
process_wb(wb);
}
var token=Cookies.get("token");
console.log(token);
if(token==null){
// alert("你是怎么进来的？请先登录");
// window.location.href="../login.html" rel="external nofollow" ;
}
var global_wb;
function process_wb(wb) {
global_wb = wb;
var output = "";
//这里是成绩批量录入代码，可以忽略不计
$(".submit_all").on("click",function(){
var array=Object.values(to_json(wb))[0];
var len=array.length;
var array1="",array2="",array3="",array4="",array5="";
for(var i=0;i<len;i++){
array1+=array[i].学号+",";
array2+=array[i].成绩+",";
array3+=array[i].总分+",";
array4+=array[i].时间+",";
array5+=array[i].评语+",";
}
array1=array1.substring(0,array1.length-1);
array2=array2.substring(0,array2.length-1);
array3=array3.substring(0,array3.length-1);
array4=array4.substring(0,array4.length-1);
array5=array5.substring(0,array5.length-1);
console.log(array1);
var url='grade/addall';
var params={
"token":token,
"gradeUserId":array1,
"gradeCourse":array2,
"gradeRank":array3,
"gradeRemark":array5,
"gradeTime":array4
};
pullData(url,params,function(res){
if(res.state==0){
alert("成绩录入成功！");
window.location.href="Techrecord.html" rel="external nofollow" rel="external nofollow" ;
}
else if(res.state==1){
alert("您输入的学号不存在");
}
});
})
output = JSON.stringify(to_json(wb), 2, 2);
if(out.innerText === undefined) out.textContent = output;
else out.innerText = output;
if(typeof console !== 'undefined') console.log(output);
}
function setfmt() {if(global_wb) process_wb(global_wb);}
var xlf = document.getElementById('xlf');
function handleFile(e) {
rABS = document.getElementsByName("userabs")[0].checked;
use_worker = document.getElementsByName("useworker")[0].checked;
var files = e.target.files;
var f = files[0];
{
var reader = new FileReader();
var name = f.name;
reader.onload = function(e) {
if(typeof console !== 'undefined')
var data = e.target.result;
if(use_worker) {
xw(data, process_wb);
} else {
var wb;
if(rABS) {
wb = X.read(data, {type: 'binary'});
} else {
var arr = fixdata(data);
wb = X.read(btoa(arr), {type: 'base64'});
}
process_wb(wb);
}
};
if(rABS) reader.readAsBinaryString(f);
else reader.readAsArrayBuffer(f);
}
}
if(xlf.addEventListener) xlf.addEventListener('change', handleFile, false);
导入一个新建的excel
查看读取到的值，以json格式显示
给大家一个GitHub插件包下载地址： https://github.com/SheetJS/js-xlsx
更多关于JavaScript相关内容感兴趣的读者可查看本站专题：《JavaScript文件与目录操作技巧汇总》、《JavaScript查找算法技巧总结》、《JavaScript数据结构与算法技巧总结》、《JavaScript遍历算法与技巧总结》、《JavaScript错误与调试技巧总结》及《JavaScript数学运算用法总结》
希望本文所述对大家JavaScript程序设计有所帮助。
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