页面上的文件上传

来源：互联网发布：圆周率前100位算法编辑：程序博客网时间：2024/06/06 19:41

转载自http://www.cnblogs.com/cloudgamer/

<!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>Insert title here</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(img/fu_btn.gif) 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">
<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><a href="javascript:void(0);" class="files" id="idFile"></a> <img id="idProcess" style="display:none;" src="img/loading.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 = {// 全局静态类, 用于声明一个新的类并提供构造函数支持
create: function() {
    return function() {// 返回一个函数, 代表着这个新声明的类的构造函数
       // 一个命名为initialize的函数将被这个类实现作为类的构造函数
      this.initialize.apply(this, arguments);
      // initialize函数将在你实例化一个变量的时候被调用执行
    }
}
}

var Extend = function(destination, source) { // 一个静态方法表示继承, 目标对象将拥有源对象的所有属性和方法
   for (var property in source) {
       destination[property] = source[property];// 利用动态语言的特性, 通过赋值动态添加属性与方法
   }
}

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:   "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:       10,//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:       ["gif","jpg","rar","zip","iso","swf"],//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", {
   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……<br />有可能因为网络问题，出现程序长时间无响应，请点击“<a href='?'><font color='red'>取消</font></a>”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){
msg=msg.replace(/<br[^>]*>/ig,   "/n").replace(/ /ig,   "   ");
alert(msg); location.href = location.href; }

</script>

</body>
</html>