| 使用 jsp/ servlet上載文件正成為一項常用的任務。以下是一個簡單的例程，使用了jspsmart的一個免費的組件。你可以在jspsmart站點進行下載。 1. html file <html> <body> <script language="javascript" src="jsfunction.js"> </script> <script language="javascript"> <!-- function checkform(){ if (document.uploadform.adsimage.value==""){ alert("you must choose what image file to upload!"); return false; } document.uploadform.submit(); } function cancelupload(){ window.close(); window.opener.focus(); } //--> </script> <form name="uploadform" method="post" action="uploadimage.jsp" enctype="multipart/form-data" target=_self> <center> <table border="1" width="65%"> <tr> <td colspan=2 nowrap align=center>廣告圖片上載</td> </tr> <tr> <td width="15%" nowrap >廣告圖片:</td> <td width="50%" nowrap><input type="file" name="adsimage" size="20"></td> </tr> <tr> <td align="center" colspan=2 > <input type="button" value="upload" > <input type="button" value="cancel" > </td> </tr> </form> </table> <!-- <a href="javascript:window.close();">close this window</a> --> <script language="javascript"> <!-- this.focus(); //--> </script> </body> 2. jsp file <%@ page language="java" import="com.jspsmart.upload.*, java.sql.*,java.util.* "%> <%-- use smartupload bean --%> <jsp:usebean id="mysmartupload" scope="page" class="com.jspsmart.upload.smartupload" /> <% //initialization mysmartupload.init(config); mysmartupload.service(request,response); //set restriction mysmartupload.setallowedfileslist("gif,bmp,jpeg,jpg"); mysmartupload.settotalmaxfilesize(51200); // upload try{ mysmartupload.upload(); } catch(exception e){ out.println("<font color=red>upload file fail!</font> <a href= "javascript:window.history.back();">back</a><br>"); out.println("<ui>notes:</ui>"); out.println("<ul>you must set correct file name.</ul>"); out.println("<ul>you file size must be less than 50k.</ul>"); out.println("<ul>you can only upload .gif .jpeg .jpg and .bmp files.</ul>"); return; } //save file to disk mysmartupload.getfiles().getfile(0).saveas("/" + "filename"); %> 3. servlet file (you can do it yourself) 資料來源：碧波山莊visual basic http://ctsvb.126.com |
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