ajaxFileUpload 文件上传下载

需要引用 的js

jQuery.extend({
   
 
    createUploadIframe: function(id, uri)
    {
           //create frame
            var frameId = 'jUploadFrame' + id;
            var iframeHtml = '<iframe id="' + frameId + '" name="' + frameId + '" style="position:absolute; top:-9999px; left:-9999px"';
           if(window.ActiveXObject)
           {
                if(typeof uri== 'boolean'){
                  iframeHtml += ' src="' + 'javascript:false' + '"';
 
                }
                else if(typeof uri== 'string'){
                  iframeHtml += ' src="' + uri + '"';
 
                }
           }
           iframeHtml += ' />';
           jQuery(iframeHtml).appendTo(document.body);
 
            return jQuery('#' + frameId).get(0);       
    },
    createUploadForm: function(id, fileElementId, data)
    {
       //create form
       var formId = 'jUploadForm' + id;
       var fileId = 'jUploadFile' + id;
       var form = jQuery('<form  action="" method="POST" name="' + formId + '" id="' + formId + '" enctype="multipart/form-data"></form>');  
       if(data)
       {
           for(var i in data)
           {
              jQuery('<input type="hidden" name="' + i + '" value="' + data[i] + '" />').appendTo(form);
           }         
       }     
       var oldElement = jQuery('#' + fileElementId);
       var newElement = jQuery(oldElement).clone();
       jQuery(oldElement).attr('id', fileId);
       jQuery(oldElement).before(newElement);
       jQuery(oldElement).appendTo(form);
 
 
      
       //set attributes
       jQuery(form).css('position', 'absolute');
       jQuery(form).css('top', '-1200px');
       jQuery(form).css('left', '-1200px');
       jQuery(form).appendTo('body');    
       return form;
    },
 
    ajaxFileUpload: function(s) {
        // TODO introduce global settings, allowing the client to modify them for all requests, not only timeout     
        s = jQuery.extend({}, jQuery.ajaxSettings, s);
        var id = new Date().getTime()       
       var form = jQuery.createUploadForm(id, s.fileElementId, (typeof(s.data)=='undefined'?false:s.data));
       var io = jQuery.createUploadIframe(id, s.secureuri);
       var frameId = 'jUploadFrame' + id;
       var formId = 'jUploadForm' + id;      
        // Watch for a new set of requests
        if ( s.global && ! jQuery.active++ )
       {
           jQuery.event.trigger( "ajaxStart" );
       }           
        var requestDone = false;
        // Create the request object
        var xml = {}  
        if ( s.global )
            jQuery.event.trigger("ajaxSend", [xml, s]);
        // Wait for a response to come back
        var uploadCallback = function(isTimeout)
       {         
           var io = document.getElementById(frameId);
            try
           {            
              if(io.contentWindow)
              {
                   xml.responseText = io.contentWindow.document.body?io.contentWindow.document.body.innerHTML:null;
                   xml.responseXML = io.contentWindow.document.XMLDocument?io.contentWindow.document.XMLDocument:io.contentWindow.document;
                   
              }else if(io.contentDocument)
              {
                   xml.responseText = io.contentDocument.document.body?io.contentDocument.document.body.innerHTML:null;
                  xml.responseXML = io.contentDocument.document.XMLDocument?io.contentDocument.document.XMLDocument:io.contentDocument.document;
              }                   
            }catch(e)
           {
              jQuery.handleError(s, xml, null, e);
           }
            if ( xml || isTimeout == "timeout")
           {            
                requestDone = true;
                var status;
                try {
                    status = isTimeout != "timeout" ? "success" : "error";
                    // Make sure that the request was successful or notmodified
                    if ( status != "error" )
                  {
                        // process the data (runs the xml through httpData regardless of callback)
                        var data = jQuery.uploadHttpData( xml, s.dataType );   
                        // If a local callback was specified, fire it and pass it the data
                        if ( s.success )
                            s.success( data, status );
   
                        // Fire the global callback
                        if( s.global )
                            jQuery.event.trigger( "ajaxSuccess", [xml, s] );
                    } else
                        jQuery.handleError(s, xml, status);
                } catch(e)
              {
                    status = "error";
                    jQuery.handleError(s, xml, status, e);
                }
 
                // The request was completed
                if( s.global )
                    jQuery.event.trigger( "ajaxComplete", [xml, s] );
 
                // Handle the global AJAX counter
                if ( s.global && ! --jQuery.active )
                    jQuery.event.trigger( "ajaxStop" );
 
                // Process result
                if ( s.complete )
                    s.complete(xml, status);
 
                jQuery(io).unbind()
 
                setTimeout(function()
                                {   try
                                   {
                                       jQuery(io).remove();
                                       jQuery(form).remove();  
                                      
                                   } catch(e)
                                   {
                                       jQuery.handleError(s, xml, null, e);
                                   }                              
 
                                }, 100)
 
                xml = null
 
            }
        }
        // Timeout checker
        if ( s.timeout > 0 )
       {
            setTimeout(function(){
                // Check to see if the request is still happening
                if( !requestDone ) uploadCallback( "timeout" );
            }, s.timeout);
        }
        try
       {
 
           var form = jQuery('#' + formId);
           jQuery(form).attr('action', s.url);
           jQuery(form).attr('method', 'POST');
           jQuery(form).attr('target', frameId);
            if(form.encoding)
           {
              jQuery(form).attr('encoding', 'multipart/form-data');              
            }
            else
           {  
              jQuery(form).attr('enctype', 'multipart/form-data');       
            }       
            jQuery(form).submit();
 
        } catch(e)
       {         
            jQuery.handleError(s, xml, null, e);
        }
      
       jQuery('#' + frameId).load(uploadCallback );
        return {abort: function () {}}; 
 
    },
 
    uploadHttpData: function( r, type ) {
        var data = !type;
        data = type == "xml" || data ? r.responseXML : r.responseText;
        // If the type is "script", eval it in global context
        if ( type == "script" )
            jQuery.globalEval( data );
        // Get the JavaScript object, if JSON is used.
        if ( type == "json" )
            eval( "data = " + data );
        // evaluate scripts within html
        if ( type == "html" )
            jQuery("<div>").html(data).evalScripts();
 
        return data;
    }
})
 <!--数据提交file submit-->
    function doSubmit(){
  	 var fileupload = document.getElementById("fileupload").value;
         if(""==fileupload){
             var msgArea = document.getElementById("msgArea");
             msgArea.innerHTML = '<font color="red" style="margin-left:10px">请选择上传文件!</font>';
             return false;
         }
         var extension=new String (fileupload.substring(fileupload.lastIndexOf(".")+1,fileupload.length));//文件扩展名
         if( extension =="doc"||extension=="docx"||extension=="pdf" || extension =="xls"  || extension =="xlsx")  {
        var archivesfileid=   document.getElementById("archivesfileid").value
         $.ajaxFileUpload
         (
             {
                 url:'${ctx}/addArchives/addFile/'+archivesfileid,//用于文件上传的服务器端请求地址
                 secureuri:false,//一般设置为false
                 fileElementId:'fileupload',//文件上传空间的id属性  <input type="file" id="file" name="file" />
                 dataType: 'json',//返回值类型 一般设置为json
                 success: function (data)  //服务器成功响应处理函数
                 {
                     appendList(data.fjid,data.fjmc,data.path,data.wjlx);
                    
                 },
                 error: function (data, status, e)//服务器响应失败处理函数
                 {
                     alert(data.msg);//从服务器返回的json中取出message中的数据,其中message为在struts2中action中定义的成员变量
                 }
             }
         )
         }     else {
             alert("请选择word,excl或者pdf格式的文件!");
             return false;

         }
         
    }
前台展示代码

	<div style="width: 100%; height: 170px;">
						<div style="width: 100%;">
							<div style="width: 100%; height: 40px;">
								<span> <span class="col_left" style="font-size: 12;"></span>
									<input type="file" class="must" name="fileupload"
									id="fileupload" size="30" style="margin: 2px 0px 2px 0px"
									onkeydown="event.returnValue=false;" onpaste="return false" />
									<input type="hidden" name="YXBZ" value="0"> <input
									type="button" name="upLoadPic" value="上传" style="cursor: hand"
									class="btn btn-success" onclick="doSubmit()" />
								</span>
							</div>
							<div id="msgArea"></div>
							<div>
								<span> <span id="fhCreateFileList"> </span>
								</span>
							</div>
						</div>
					</div>


转载于:https://my.oschina.net/mola/blog/335267

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