How to implement asynchronous file upload using native js-JS Tutorial-php.cn

How to implement asynchronous file upload using native js

一个新手

Release： 2017-10-26 10:03:08

Original

2010 people have browsed it

Rendering:

Code: (demo33.jsp)

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>demo33.jsp</title>
</head>
<body>
<label for="text">名称</label>
<input type="text" id="text" name="name"/>
<label for="file">文件</label>
<input type="file" id="file" name="file"/>
<button type="button" onclick="ajaxUploadFile()">确定</button>
</body>
<script type="text/javascript">
    function ajaxUploadFile() {
        var formData = new FormData();
        var xmlhttp;
        if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari
            xmlhttp = new XMLHttpRequest();
        }else {// code for IE6, IE5
            xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
        }
        xmlhttp.open("POST","/data",true);
        xmlhttp.setRequestHeader("X-Requested-With", "XMLHttpRequest");
        formData.append("name",document.getElementById("text").value);
        formData.append("file",document.getElementById("file").files[0]);
        xmlhttp.send(formData);
        xmlhttp.onreadystatechange=function() {
            if (xmlhttp.readyState==4) {
                if (xmlhttp.status==200) {
                    console.log("上传成功"+xmlhttp.responseText);
                }else {
                    console.log("上传失败"+xmlhttp.responseText);
                }
            }
        }
    }
</script>
</html>

Copy after login

The above is the detailed content of How to implement asynchronous file upload using native js. For more information, please follow other related articles on the PHP Chinese website!