<input name="upimage" id="upload_file" type="file"><img src="/img/touxiang.jpg" id="showImage" ><br /><br />
<script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script> //jq cdn <script type="text/javascript"> var imgurl = ‘aaa‘; $(‘#upload_file‘).change = function (){ ???????????gen_base64(); ???????}; function $_(id) { return document.getElementById(id);
} function gen_base64() { var file = $_(‘upload_file‘).files[0]; r = new FileReader(); ?//本地预览 r.onload = function(){ console.log(r.result) ???//r.result 即为base64编码 $(‘#showImage‘).attr(‘src‘,r.result) ?????????} ???????r.readAsDataURL(file); ???//Base64 ????}</script> ???????
js获取input上传图片装换为base64格式图片
原文地址：http://www.cnblogs.com/szyblogs/p/7542365.html