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javascript仿163网盘无刷新文件上传系统

时间：2021-07-01 10:21:17 帮助过：15人阅读

本来觉得这个系统会很复杂，但把每个部分都分析清楚后，其实需要的技术并不高。不过当我把各个功能函数都整理好准备进行封装时，却发现要把程序封装不是那么容易，因为程序跟html的耦合度太高。然后我逐步把程序中操作html相关的部分分离出来，首先把简单的分离，接着是文件列表，然后是file控件，最后是一些提示性程序。经过几次尝试才把整个结构封装好。
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <title>仿163网盘无刷新文件上传系统</title> </head> <body> <style> .fu_list { width:600px; background:#ebebeb; font-size:12px; } .fu_list td { padding:5px; line-height:20px; background-color:#fff; } .fu_list table { width:100%; border:1px solid #ebebeb; } .fu_list thead td { background-color:#f4f4f4; } .fu_list b { font-size:14px; } /*file容器样式*/ a.files { width:90px; height:30px; overflow:hidden; display:block; border:1px solid #BEBEBE; background:url(/attachment.php?aid=8332&noupdate=yes) left top no-repeat; text-decoration:none; } a.files:hover { background-color:#FFFFEE; background-position:0 -30px; } /*file设为透明，并覆盖整个触发面*/ a.files input { margin-left:-350px; font-size:30px; cursor:pointer; filter:alpha(opacity=0); opacity:0; } /*取消点击时的虚线框*/ a.files, a.files input { outline:none;/*ff*/ hide-focus:expression(this.hideFocus=true);/*ie*/ } </style> <form id="uploadForm" action="File.ashx"> <table border="0" cellspacing="1" class="fu_list"> <thead> <tr> <td colspan="2"><b>上传文件</b></td> </tr> </thead> <tbody> <tr> <td align="right" width="15%" style="line-height:35px;">添加文件：</td> <td> <img id="idProcess" style="display:none;" src="https://img.gxlcms.com//Uploads-s/new/2019-09-17-201917/20081020205841666.gif" /></td> </tr> <tr> <td colspan="2"><table border="0" cellspacing="0"> <thead> <tr> <td>文件路径</td> <td width="100"></td> </tr> </thead> <tbody id="idFileList"> </tbody> </table></td> </tr> <tr> <td colspan="2" style="color:gray">温馨提示：最多可同时上传 <b id="idLimit"></b> 个文件，只允许上传 <b id="idExt"></b> 文件。 </td> </tr> <tr> <td colspan="2" align="center" id="idMsg"><input type="button" value="开始上传" id="idBtnupload" disabled="disabled" /> <input type="button" value="全部取消" id="idBtndel" disabled="disabled" /> </td> </tr> </tbody> </table> </form> <script type="text/javascript"> var isIE = (document.all) ? true : false; var $ = function (id) { return "string" == typeof id ? document.getElementById(id) : id; }; var Class = { create: function() { return function() { this.initialize.apply(this, arguments); } } } var Extend = function(destination, source) { for (var property in source) { destination[property] = source[property]; } } var Bind = function(object, fun) { return function() { return fun.apply(object, arguments); } } var Each = function(list, fun){ for (var i = 0, len = list.length; i < len; i++) { fun(list[i], i); } }; //文件上传类 var FileUpload = Class.create(); FileUpload.prototype = { //表单对象，文件控件存放空间 initialize: function(form, folder, options) { this.Form = $(form);//表单 this.Folder = $(folder);//文件控件存放空间 this.Files = [];//文件集合 this.SetOptions(options); this.FileName = this.options.FileName; this._FrameName = this.options.FrameName; this.Limit = this.options.Limit; this.Distinct = !!this.options.Distinct; this.ExtIn = this.options.ExtIn; this.ExtOut = this.options.ExtOut; this.onIniFile = this.options.onIniFile; this.onEmpty = this.options.onEmpty; this.onNotExtIn = this.options.onNotExtIn; this.onExtOut = this.options.onExtOut; this.onLimite = this.options.onLimite; this.onSame = this.options.onSame; this.onFail = this.options.onFail; this.onIni = this.options.onIni; if(!this._FrameName){ //为每个实例创建不同的iframe this._FrameName = "uploadFrame_" + Math.floor(Math.random() * 1000); //ie不能修改iframe的name var oFrame = isIE ? document.createElement("<iframe name=\"" + this._FrameName + "\">") : document.createElement("iframe"); //为ff设置name oFrame.name = this._FrameName; oFrame.style.display = "none"; //在ie文档未加载完用appendChild会报错 document.body.insertBefore(oFrame, document.body.childNodes[0]); } //设置form属性，关键是target要指向iframe this.Form.target = this._FrameName; this.Form.method = "post"; //注意ie的form没有enctype属性，要用encoding this.Form.encoding = "multipart/form-data"; //整理一次 this.Ini(); }, //设置默认属性 SetOptions: function(options) { this.options = {//默认值 FileName: "",//文件上传控件的name，配合后台使用 FrameName: "",//iframe的name，要自定义iframe的话这里设置name onIniFile: function(){},//整理文件时执行(其中参数是file对象) onEmpty: function(){},//文件空值时执行 Limit:0,//文件数限制，0为不限制 onLimite: function(){},//超过文件数限制时执行 Distinct: true,//是否不允许相同文件 onSame: function(){},//有相同文件时执行 ExtIn: [],//允许后缀名 onNotExtIn: function(){},//不是允许后缀名时执行 ExtOut: [],//禁止后缀名，当设置了ExtIn则ExtOut无效 onExtOut: function(){},//是禁止后缀名时执行 onFail: function(){},//文件不通过检测时执行(其中参数是file对象) onIni: function(){}//重置时执行 }; Extend(this.options, options || {}); }, //整理空间 Ini: function() { //整理文件集合 this.Files = []; //整理文件空间，把有值的file放入文件集合 Each(this.Folder.getElementsByTagName("input"), Bind(this, function(o){ if(o.type == "file"){ o.value && this.Files.push(o); this.onIniFile(o); } })) //插入一个新的file var file = document.createElement("input"); file.name = this.FileName; file.type = "file"; file.onchange = Bind(this, function(){ this.Check(file); this.Ini(); }); this.Folder.appendChild(file); //执行附加程序 this.onIni(); }, //检测file对象 Check: function(file) { //检测变量 var bCheck = true; //空值、文件数限制、后缀名、相同文件检测 if(!file.value){ bCheck = false; this.onEmpty(); } else if(this.Limit && this.Files.length >= this.Limit){ bCheck = false; this.onLimite(); } else if(!!this.ExtIn.length && !RegExp("\.(" + this.ExtIn.join("|") + ")$", "i").test(file.value)){ //检测是否允许后缀名 bCheck = false; this.onNotExtIn(); } else if(!!this.ExtOut.length && RegExp("\.(" + this.ExtOut.join("|") + ")$", "i").test(file.value)) { //检测是否禁止后缀名 bCheck = false; this.onExtOut(); } else if(!!this.Distinct) { Each(this.Files, function(o){ if(o.value == file.value){ bCheck = false; } }) if(!bCheck){ this.onSame(); } } //没有通过检测 !bCheck && this.onFail(file); }, //删除指定file Delete: function(file) { //移除指定file this.Folder.removeChild(file); this.Ini(); }, //删除全部file Clear: function() { //清空文件空间 Each(this.Files, Bind(this, function(o){ this.Folder.removeChild(o); })); this.Ini(); } } var fu = new FileUpload("uploadForm", "idFile", { Limit: 3, ExtIn: ["jpg", "gif"], onIniFile: function(file){ file.value ? file.style.display = "none" : this.Folder.removeChild(file); }, onEmpty: function(){ alert("请选择一个文件"); }, onLimite: function(){ alert("超过上传限制"); }, onSame: function(){ alert("已经有相同文件"); }, onNotExtIn: function(){ alert("只允许上传" + this.ExtIn.join("，") + "文件"); }, onFail: function(file){ this.Folder.removeChild(file); }, onIni: function(){ //显示文件列表 var arrRows = []; if(this.Files.length){ var oThis = this; Each(this.Files, function(o){ var a = document.createElement("a"); a.innerHTML = "取消"; a.href = "javascript:void(0);"; a.onclick = function(){ oThis.Delete(o); return false; }; arrRows.push([o.value, a]); }); } else { arrRows.push(["<font color='gray'>没有添加文件</font>", " "]); } AddList(arrRows); //设置按钮 $("idBtnupload").disabled = $("idBtndel").disabled = this.Files.length <= 0; } }); $("idBtnupload").onclick = function(){ //显示文件列表 var arrRows = []; Each(fu.Files, function(o){ arrRows.push([o.value, " "]); }); AddList(arrRows); fu.Folder.style.display = "none"; $("idProcess").style.display = ""; $("idMsg").innerHTML = "正在添加文件到您的网盘中，请稍候…… 有可能因为网络问题，出现程序长时间无响应，请点击"<font color='red'>取消</font>"重新上传文件"; //fu.Form.submit(); } //用来添加文件列表的函数 function AddList(rows){ //根据数组来添加列表 var FileList = $("idFileList"), oFragment = document.createDocumentFragment(); //用文档碎片保存列表 Each(rows, function(cells){ var row = document.createElement("tr"); Each(cells, function(o){ var cell = document.createElement("td"); if(typeof o == "string"){ cell.innerHTML = o; }else{ cell.appendChild(o); } row.appendChild(cell); }); oFragment.appendChild(row); }) //ie的table不支持innerHTML所以这样清空table while(FileList.hasChildNodes()){ FileList.removeChild(FileList.firstChild); } FileList.appendChild(oFragment); } $("idLimit").innerHTML = fu.Limit; $("idExt").innerHTML = fu.ExtIn.join("，"); $("idBtndel").onclick = function(){ fu.Clear(); } //在后台通过window.parent来访问主页面的函数 function Finish(msg){ alert(msg); location.href = location.href; } </script> </body> </html>
[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]
在线演示 http://img.jb51.net/online/FileUpload/FileUpload.htm
打包文件下载 http://xiazai.jb51.net/200810/yuanma/FileUpload.rar

javascript仿163网盘无刷新文件上传系统

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