用JSP/Servlets实现Web方式的文件上传
Use JSP and Servlet to Upload file to server is becoming a
common task now.
Below is a simple example use the jspsmart free component which
implements it.
You can download the free package from JSPSMART

1. Html File

action="uploadImage.jsp" ENCTYPE="multipart/form-data"
target=_self>

广告图片上载
广告图片:	name="adsImage" size="20">

2. JSP File
<%@ page language="java" import="com.jspsmart.upload.*,
java.sql.*,java.util.* "%>
<%-- use SmartUpload bean --%>
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("Upload File Fail!
"JavaScript:window.history.back();">back
");
out.println("Notes:");

out.println("

You must set correct File
Name.

");
out.println("

You file size must be less than
50K.

");
out.println("

You can only upload .Gif .jpeg .jpg and
.bmp files.

");

return;

}
//save file to disk
mySmartUpload.getFiles().getFile(0).saveAs("/" +
"FileName");

　

%>

3. Servlet File (you can do it yourself)