web文件上传，带进度条

原生ajax上传带进度条 (百分比)

<%@ page language="java" contentType="text/html; charset=UTF-8"

    pageEncoding="UTF-8"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

<title>文件上传 原生ajax上传</title>

<style type="text/css">

.container{

    width: 200px;

    height: 20px;

    background-color: gray;

}

#progress{

    height: 20px;

    background-color: orange;

    display: inline-block;

}

</style>

</head>

<body>

    <form action="${pageContext.request.contextPath }/upload"

        enctype="multipart/form-data" method="post">

         上传文件1: <input type="file" name="file1" id="file"><br />

         <div class='container'>

             <span id="progress"></span>

         </div>

    </form>

    <br>

    <button onclick="fileSelected()">文件信息</button><button onclick="uploadFile()">确认上传</button>

    <div id="info">

        <div id="fileName"></div>

        <div id="fileSize"></div>

        <div id="fileType"></div>

    </div>

    <div id="result"></div>

    <script>

        function fileSelected() {

            var file = document.getElementById('file').files[0];

            if (file) {

                var fileSize = 0;

                if (file.size > 1024 * 1024)

                    fileSize = (Math.round(file.size * 100 / (1024 * 1024)) / 100).toString() + 'MB';

                else

                    fileSize = (Math.round(file.size * 100 / 1024) / 100).toString() + 'KB';

                document.getElementById('fileName').innerHTML = 'Name: ' + file.name;

                document.getElementById('fileSize').innerHTML = 'Size: ' + fileSize;

                document.getElementById('fileType').innerHTML = 'Type: ' + file.type;

            }

        }

        function uploadFile() {

            var fd = new FormData();

            fd.append("file", document.getElementById('file').files[0]);

            var xhr = new XMLHttpRequest();

            xhr.upload.addEventListener("progress", uploadProgress, false);

            xhr.addEventListener("load", uploadComplete, false);

            xhr.addEventListener("error", uploadFailed, false);

            xhr.addEventListener("abort", uploadCanceled, false);

            xhr.open("POST", "${pageContext.request.contextPath }/upload");//修改成自己的接口

            xhr.send(fd);

        }

        function uploadProgress(evt) {

            if (evt.lengthComputable) {

                var percent = Math.round(evt.loaded * 100 / evt.total);

                document.getElementById('progress').innerHTML = percent.toFixed(2) + '%';

                document.getElementById('progress').style.width = percent.toFixed(2) + '%';

            }

            else {

                document.getElementById('progress').innerHTML = 'unable to compute';

            }

        }

        function uploadComplete(evt) {

            /* 服务器端返回响应时候触发event事件*/

            document.getElementById('result').innerHTML = evt.target.responseText;

        }

        function uploadFailed(evt) {

            alert("There was an error attempting to upload the file.");

        }

        function uploadCanceled(evt) {

            alert("The upload has been canceled by the user or the browser dropped the connection.");

        }

    </script>

</body>

</html>

Jquery ajax上传带进度条 (bytes进度)

<%@ page language="java" contentType="text/html; charset=UTF-8"

    pageEncoding="UTF-8"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

<title>文件上传 jquery上传</title>

<script type="text/javascript" src="js/jquery.min.js"></script>

<style type="text/css">

.container{

    width: 200px;

    height: 20px;

    background-color: gray;

}

#progress{

    height: 20px;

    background-color: orange;

    display: inline-block;

}

</style>

</head>

<body>

    <form action="${pageContext.request.contextPath }/upload"

        enctype="multipart/form-data" method="post">

         上传文件1: <input type="file" name="file1"><br />

         <div class='container'>

             <span id="progress"></span>

         </div>

    </form>

    <br>

    <button onclick="upload()">确认上传</button>

    <div id="info"></div>

    <div id="result"></div>

    <script>

        var totalSize = 0;  

        //绑定所有type=file的元素的onchange事件的处理函数

        $(':file').change(function() {

            var file = this.files[0]; //假设file标签没打开multiple属性，那么只取第一个文件就行了

            name = file.name;

            size = file.size;

            type = file.type;

            url = window.URL.createObjectURL(file); //获取本地文件的url，如果是图片文件，可用于预览图片  

            totalSize += size;

            $("#info").html("文件名：" + name + "<br>文件类型：" + type + "<br>文件大小：" + size + "<br>url: " + url);  

        });  

        function upload() {

            //创建FormData对象，初始化为form表单中的数据。需要添加其他数据可使用formData.append("property", "value");

            var formData = new FormData($('form')[0]);  

            //ajax异步上传

            $.ajax({

                url: "${pageContext.request.contextPath }/upload",

                type: "POST",

                data: formData,

                xhr: function(){ //获取ajaxSettings中的xhr对象，为它的upload属性绑定progress事件的处理函数  

                    myXhr = $.ajaxSettings.xhr();

                    if(myXhr.upload){ //检查upload属性是否存在

                        //绑定progress事件的回调函数

                        myXhr.upload.addEventListener('progress',progressHandlingFunction, false);

                    }

                    return myXhr; //xhr对象返回给jQuery使用

                },

                success: function(result){

                    $("#result").html(result);

                },

                contentType: false, //必须false才会自动加上正确的Content-Type

                processData: false  //必须false才会避开jQuery对 formdata 的默认处理

            });

        }         

        //上传进度回调函数：

        function progressHandlingFunction(e) {

            if (e.lengthComputable) {

                $('#progress').attr({value : e.loaded, max : e.total}); //更新数据到进度条

                var percent = e.loaded/e.total*100;

                $('#progress').html(e.loaded + "/" + e.total+" bytes. " + percent.toFixed(2) + "%");

                $('#progress').css('width', percent.toFixed(2) + "%");

            }

        }

    </script>

</body>

</html>

转 : https://www.cnblogs.com/h--d/p/Web.html

https://www.cnblogs.com/zhangyongl/p/8312881.html

巴特西

web文件上传，带进度条

原生ajax上传带进度条 (百分比)

Jquery ajax上传带进度条 (bytes进度)

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