http://www.jb51.net/article/21191.htm
<!doctype html><html lang="en"><head> ???<meta charset="UTF-8"> ???<title>js 读本地文件</title> ???????<script src="jquery.js"></script></head><body> ???<input type="file" id="data" name=""> ???<a href="#" onclick="load()">Load</a> ???<br/> ???<div id="editor" contentEditable="true" style="height: 250px;"></div> ???<script> ?????function load() { ???????var finput = document.getElementById("data"); ???????// var editor = document.getElementById("editor"); ???????var f = finput.files[0]; ???????if(f){ ?????????var r = new FileReader(); ?????????r.onload = function(e){ ????????????var result = e.target.result; ???????????if(result){ ?????????????var errMsg = ‘‘; ?????????????var codeList = []; ?????????????var lines = result.split(‘\r\n‘); ?????????????for(var i=0; i<lines.length; i++){ ???????????????var line = lines[i].split(‘,‘); ???????????????if(line[0] != ‘‘ && line[1] != ‘‘){ ?????????????????codeList.push({"code": line[0],"weight": line[1]}) ???????????????}else{ ?????????????????errMsg += (‘数据格式不正确: ‘ + line); ???????????????} ?????????????} ?????????????if(codeList.length > 0){ ???????????????show(codeList); ?????????????} ?????????????if(errMsg != ‘‘){ ???????????????alert(errMsg); ?????????????} ???????????} ?????????} ?????????r.readAsText(f); ???????} ???????// else{ ???????// ??editor.InnerHTML = "Failed to load file"; ???????// } ?????} ?????function show(codeList){ ???????for(var i=0; i<codeList.length;i++){ ?????????console.log(‘line ‘ + i + ‘ code: ‘ + codeList[i].code + ‘ ?weight: ‘ + codeList[i].weight); ???????} ?????} ???</script></body></html>
js 读本地文件
原文地址：https://www.cnblogs.com/james641/p/8986406.html