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Re:怎样编写上传程序？ [Re:chaos]

gunrose

发贴: 100
积分: 20

于 2003-03-25 13:00

There is no Servlet/JSP API where you can retreive the uploaded file. However, you can use a third party package such as com.oreilly.servlet from Oreilly. You can take a look at the .java sources in this package to see how the uploaded files and parameters are parsed out. Here is a code snippet using the MultipartParser

import java.io.*;
import com.oreilly.servlet.multipart.*;

int maxFileSize = 5 * 1024 * 1024; // 5MB max
String uploadDir = "/tmp/";
MultipartParser parser =
new MultipartParser(request, maxFileSize);
Part p = null;
long numBytes = 0;

while((p = parser.readNextPart()) != null)
{
if(p.isParam())
{ //Do something here with other form
//elements that are not files
}
else if(p.isFile())
{ FilePart fp = (FilePart)p;
// my_file is the name of the file
// declared in the html form
if (p.getName().equals("my_file"))
{ numBytes =
fp.writeTo(new File(uploadDir));
}
}
}

Another solution to make handling multipart/form-data POST request easier is to use the MultipartFilter class. For more information on MultipartFilter class, check out the com.oreilly.servlet package.

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话题树型展开

人气	标题	作者	字数	发贴时间
5024	怎样编写上传程序？	AT	56	2003-03-24 09:22
4246	Re:怎样编写上传程序？	floater	113	2003-03-25 02:05
4209	Re:怎样编写上传程序？	chaos	312	2003-03-25 03:33
4718	Re:怎样编写上传程序？	gunrose	1303	2003-03-25 13:00
4415	Re:怎样编写上传程序？	AT	19	2003-03-26 16:53

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