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
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