简单好用用js就可以保存文本文件到本地

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<meta charset="utf-8" />

<title></title>

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<body>



<!DOCTYPE html>

<html>

<head>

  <meta charset="utf-8">

  <meta name="description" content="A simple HTML5 Template">

  <meta name="author" content="dron">

  <meta name="viewport" content="width=device-width,
height=device-height, user-scalable=no, initial-scale=1.0,
maximum-scale=1.0">

  <meta name="apple-mobile-web-app-capable" content="yes">

  <meta name="apple-mobile-web-app-status-bar-style" content="black">

  <title>保存文本文件到本地</title>

  <link href="http://ucren.com/static/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet">

  <script src="http://ucren.com/static/jquery/2.2.3/jquery.min.js"></script>

  <script src="http://ucren.com/static/bootstrap/3.3.6/js/bootstrap.min.js"></script>

  <style>

    .container-fluid{ margin-top: 20px; }

  </style>

</head>

<body>

  <script>

    void function(a){a.siteToolbar=function b(a){b.setting=a||{}},document.write

    ('<div class="ucren-toolbar-placeholder" style="height:3000px;"></div><scri'

    +'pt src="//ucren.com/ucren-toolbar/scripts/main.js"><\/script>')}(this);

    siteToolbar();

  </script>





  <div class="container-fluid">

    <div class="row">

      <div class="col-md-3">

        <div class="form-group">

          <label>文件内容</label>

          <textarea class="form-control" rows="4" id="content">测试文本，你可以随便修改，完事后点保存。</textarea>  

        </div>





        <div class="form-group">

          <label>文件名</label>

          <input type="text" class="form-control" value="test.txt" id="file-name">

        </div>





        <a id="save-btn" class="btn btn-default" download="test.txt" role="button">保存</a>

      </div>

    </div>

  </div>





  <script>

    void function(){

      var content, fileName, saveBtn;





      content = document.querySelector( '#content' );

      fileName = document.querySelector( '#file-name' );

      saveBtn = document.querySelector( '#save-btn' );





      content.addEventListener( 'change', function self(){

        saveBtn.setAttribute( 'href', 'data:text/paint; utf-8,' + content.value );

        return self;

      }() );





      fileName.addEventListener( 'change', function self(){

        saveBtn.setAttribute( 'download', fileName.value );

        return self;

      }() );

    }();

  </script>





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    (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),

    m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)

    })(window,document,'script','//www.google-analytics.com/analytics.js','ga');

    ga('create', 'UA-4190821-1', 'ucren.com');

    ga('send', 'pageview');

  </script>

</body>

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