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iframe实现无刷新下传文件

热度:95   发布时间:2012-09-24 13:49:41.0
iframe实现无刷新上传文件

[代码] [HTML]代码

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01 <html>???
02 <body>???
03 ????
04 <form action="upload.jsp" id="form1" name="form1" encType="multipart/form-data"? method="post" target="hidden_frame" >???
05 ????<input type="file" id="file" name="file" style="width:450">???
06 ????<INPUT type="submit" value="上传文件"><span id="msg"></span>???
07 ????<br>???
08 ????<font color="red">支持JPG,JPEG,GIF,BMP,SWF,RMVB,RM,AVI文件的上传</font>?????????????????
09 ????<iframe name='hidden_frame' id="hidden_frame" style='display:none'></iframe>???
10 </form>???
11 ????
12 </body>???
13 </html>???
14 ????
15 <script type="text/javascript">???
16 function callback(msg)???
17 {???
18 ????document.getElementById("file").outerHTML = document.getElementById("file").outerHTML;???
19 ????document.getElementById("msg").innerHTML = "<font color=red>"+msg+"</font>";???
20 }???
21 </script>

[代码] 原理就是输出一段js代码到 iframe 中,然后在iframe中来控制它的父页面

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01 <%@ page language="java" contentType="text/html; charset=gb2312" %>???
02 <%@ page import="com.jspsmart.upload.SmartUpload"%>???
03 ????
04 <%???
05 ????//新建一个SmartUpload对象???
06 ????SmartUpload su = new SmartUpload();???
07 ????
08 ????//上传初始化???
09 ????su.initialize(pageContext);???
10 ????
11 ????// 设定上传限制???
12 ????//1.限制每个上传文件的最大长度。???
13 ????su.setMaxFileSize(10000000);???
14 ????
15 ????//2.限制总上传数据的长度。???
16 ????su.setTotalMaxFileSize(20000000);???
17 ????
18 ????//3.设定允许上传的文件(通过扩展名限制),仅允许doc,txt文件。???
19 ????su.setAllowedFilesList("doc,txt,jpg,rar,mid,waw,mp3,gif");???
20 ?????????
21 ????boolean sign = true;???
22 ?????????
23 ????//4.设定禁止上传的文件(通过扩展名限制),禁止上传带有exe,bat,jsp,htm,html扩展名的文件和没有扩展名的文件。???
24 ????try {???
25 ????????su.setDeniedFilesList("exe,bat,jsp,htm,html");???
26 ????
27 ????????//上传文件???
28 ????????su.upload();???
29 ????????//将上传文件保存到指定目录???
30 ????????su.save("c:\\");??
31 ???
32 ????} catch (Exception e) {??
33 ????????e.printStackTrace();??
34 ????????sign = false;??
35 ????}??
36 ????if(sign==true)??
37 ????{??
38 ????????out.println("<script>parent.callback('upload file success')</script>");??
39 ????}else??
40 ????{??
41 ????????out.println("<script>parent.callback('upload file error')</script>");???
42 ????}???
43 %>
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