<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
<p>
<label>请选择一个文件：</label>
<input type="file" id="file" />
<input type="button" value="读取文本文件utf-8" onclick="readAsText()" />
</p>
<div id="result" name="result"></div>
</body>
<script type="text/javascript">
var result = document.getElementById("result");
var file = document.getElementById("file");
if (typeof FileReader == 'undefined') {
result.InnerHTML = "<p>你的浏览器不支持FileReader接口！</p>";
//使选择控件不可操作
file.setAttribute("disabled", "disabled");
}
//读取文本数据
function readAsText() {
var file = document.getElementById("file").files[0];
var reader = new FileReader();
//将文件以文本形式读入页面
reader.readAsText(file, "UTF-8");
reader.onload = function (f) {
var result = document.getElementById("result");
//显示文件
result.innerHTML = this.result;
}
console.log(reader);
}
</script>
</html>
