使用servlet和jsp上载文件


答案：Use JSP and Servlet to Upload file to server is becoming a 
common task now. 
Below is a 易做图 example use the jspsmart free component which 
implements it. 
You can download the free package from JSPSMART 

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>广告图片上载</td> 

</tr> 
<tr> 
<td width="15%" nowrap >广告图片:</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" onclick="return 
checkForm();" > 
    
<input type="button" value="Cancel" onclick="return 
cancelUpload();"> 
</td> 

</tr> 
</form> 
</table> 
<!-- 
<a href=>--> 
<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)
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