纯js
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<input id="upfile" name="upfile" type="file" multiple="multiple" />
<div id="result"></div>
<script type="text/javascript">
document.getElementById("upfile").addEventListener("change",function () {
var file = document.getElementById('upfile').files[0];
console.log(file);
var reader = new FileReader();
console.log(reader);
reader.readAsText(file,'utf-8');
reader.onload = function () {
document.getElementById('result').innerHTML = reader.result;
}
});
</script>
</body>
</html>
