input file 读取文件内容


<html lang="en">
<head>
    <title>title>
    <script src="js/jquery.min.js" type="text/javascript">script>  
    <script type="text/javascript">        
        if(typeof FileReader == "undified") {
            alert("您老的浏览器不行了!");
        }
        function showDataByURL() {
            var resultFile = document.getElementById("fileDemo").files[0];
            if (resultFile) {
                var reader = new FileReader();                
                reader.readAsDataURL(resultFile);
                reader.onload = function (e) {
                    var urlData = this.result;
                    document.getElementById("result").innerHTML += ""</span> + resultFile.name + <span class="hljs-string">"";
                }; 

            }

        } 
        function showDataByBinaryString() {
              var resultFile = document.getElementById("fileDemo").files[0];
            if (resultFile) {
                var reader = new FileReader();
                //异步方式,不会影响主线程
                reader.readAsBinaryString(resultFile);

                reader.onload = function(e) {
                    var urlData = this.result;
                    document.getElementById("result").innerHTML += urlData;
                };
            }
        }
        function showDataByText() {
            var resultFile = document.getElementById("fileDemo").files[0];
            if (resultFile) {
                var reader = new FileReader();

                reader.readAsText(resultFile,'UTF-8');
                reader.onload = function (e) {
                    var urlData = this.result;
                    document.getElementById("result").innerHTML += urlData;
                };
            }
        }
    script>
head>
<body>
    <input type="file" name="fileDemo" id="fileDemo" multep/>
    <input type="button" value="readAsDataURL" id="readAsDataURL" onclick="showDataByURL();"/>
    <input type="button" value="readAsBinaryString"  id="readAsBinaryString" onclick="showDataByBinaryString();"/>
    <input type="button" value="readAsText"  id="readAsText" onclick="showDataByText();"/>
    <div id="result">

    div>

body>
html>

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