swfupload + commons-fileupload实现文件批量上传，带百分比进度

发布时间：2020-12-15 18:28:58 所属栏目：百科来源：网络整理

导读：swfupload是一个操纵flash上传文件的javascript库，提供客户端实现，官网：http://code.google.com/p/swfupload/ fileupload是文件上传的服务器端实现，官网：http://commons.apache.org/fileupload/ 本文的环境是在eclipse中配置好本机上的tomcat7上实现。

swfupload是一个操纵flash上传文件的javascript库，提供客户端实现，官网：http://code.google.com/p/swfupload/

fileupload是文件上传的服务器端实现，官网：http://commons.apache.org/fileupload/

本文的环境是在eclipse中配置好本机上的tomcat7上实现。具体细节参见源代码。

有几处加以说明：

1> 这里的实现是在点击"upload"选择文件以后自动上传，如果想自己控制上传，可以将handlers.js中的this.startUpload注释掉，同时在index.jsp中初始化SWFupload的custom_settings中加一个类似于cancelButtonId的startButton按钮，然后在下面html里增加一个相对应的startButton,并且onclick="upload.startUpload();" 这样可以通过点击这个按钮来实现文件上传。

2> 原有的上传进度条是没有百分比的，其设置在handlers.js中的uploadProgress函数中，修改Line 130为progress.setStatus("Uploading...("+percent+" %)");

3> swfupload在firefox等有些浏览器中无法带上session,因此如果页面需要带有session信息，那么只能手动指定，可以在index.jsp中先得到sessionID: <% String sessionID = session.getId(); System.out.println("session is:" + sessionID); %> ，然后在js中调用：

upload_url: "<%=request.getContextPath()%>/upload.jsp;jsessionid=" + '<%=sessionID%>',

4> 参数传递：如果index.jsp在提交页面的时候希望传递一些参数，比如sbmtForm=myForm，那么可以：

post_params: { "sbmtForm": 'myForm' },?
use_query_string : true,

源码：http://download.csdn.net/detail/sundongsdu/4642497

两个主要文件列此：

index.jsp

<%@ page contentType="text/html;charset=utf-8" %>
<!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>
<title>SWFUpload Demos - External Interface Demo</title>
<% String sessionID = session.getId(); System.out.println("session is:" + sessionID); %>
<link href="swfupload/default.css" rel="stylesheet" type="text/css" />
<script type="text/javascript" src="swfupload/swfupload.js"></script>
<script type="text/javascript" src="swfupload/fileprogress.js"></script>
<script type="text/javascript" src="swfupload/handlers.js"></script>
<script type="text/javascript">
	var upload;
	
	window.onload = function() {
		var settings = {
   			flash_url : "<%=request.getContextPath()%>/swfupload/swfupload.swf",upload_url: "<%=request.getContextPath()%>/upload.jsp;jsessionid=" + '<%=sessionID%>',post_params: { "sbmtForm": 'myForm' },use_query_string : true,file_size_limit : "100 MB",file_types : "*.*",file_types_description : "All Files",file_upload_limit : 10,file_queue_limit : 0,custom_settings : {
   				progressTarget : "fsUploadProgress",cancelButtonId : "btnCancel",//   				startButton:"startButton",percentage:"percentage"
   			},debug: false,// Button Settings
   			button_image_url : "<%=request.getContextPath()%>/swfupload/XPButtonUploadText_61x22.png",// Relative to the SWF file
   			button_placeholder_id : "spanButtonPlaceHolder",button_width: 61,button_height: 22,// The event handler functions are defined in handlers.js
   			file_dialog_start_handler : fileDialogStart,file_queued_handler : fileQueued,file_queue_error_handler : fileQueueError,file_dialog_complete_handler : fileDialogComplete,upload_start_handler : uploadStart,upload_progress_handler : uploadProgress,upload_error_handler : uploadError,upload_success_handler : uploadSuccess,upload_complete_handler : uploadComplete
   		};

		upload = new SWFUpload(settings);
    };
</script>
</head>
<body>

<div id="content">
	<form id="form1" method="post" enctype="multipart/form-data">

		<div class="fieldset flash" id="fsUploadProgress">
			<span class="legend">Upload Queue</span>
		</div>
		<div style="padding-left: 5px;">
			<span id="spanButtonPlaceHolder"></span>
			
            <input id="btnCancel" type="button" value="Cancel" onclick="cancelQueue(upload);" disabled="disabled" style="margin-left: 2px; height: 22px; font-size: 8pt;"/>
		</div>	
		
	</form>
</div>
</body>
</html>

upload.jsp:

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ page import="org.apache.commons.fileupload.servlet.*" %>
<%@ page import="org.apache.commons.fileupload.*" %>
<%@ page import="org.apache.commons.fileupload.disk.*" %>
<%@ page import="org.apache.commons.io.*" %>
<%@ page import="java.util.*" %>
<%@ page import="java.io.*" %>
<%
	if (ServletFileUpload.isMultipartContent(request))
	{
	try {
		DiskFileItemFactory factory = new DiskFileItemFactory();
		factory.setSizeThreshold(1024*400);   
		File tmpFile = new File(this.getServletContext().getRealPath("/") + "WEB-INF/tmpfile");
		if (!tmpFile.exists())
			FileUtils.forceMkdir(tmpFile);
		factory.setRepository(tmpFile);
		
		ServletFileUpload u = new ServletFileUpload(factory);
		u.setHeaderEncoding("utf-8");
		u.setSizeMax(1024*1024*400);
		
		String uploadPath = this.getServletContext().getRealPath("/") + "WEB-INF/uploadfile";
		File f = new File(uploadPath);
		if (!f.exists())
			FileUtils.forceMkdir(f);
		
		List list = u.parseRequest(request);
		Iterator it = list.iterator();
		FileItem item = null;
		while (it.hasNext()) {
		    item = (FileItem) it.next();
		    
		    if (!item.isFormField()) {
		    	String filename = uploadPath + "/" + item.getName();
				item.write(new File(filename));
			}
		}		
	}
	catch (Exception e){
		e.printStackTrace();
	}
	}
%>

（编辑：李大同）

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