[原创]从web站点copy文件

[原创]从web站点copy文件

/**
* @(#) copyURL.java
*
* Copyright 2004 Opensource Develop Team. All rights reserved.
*/

// package
package com.opensource.url;

// import classes
import java.net.*;
import java.io.*;
import java.util.Date;
import java.util.StringTokenizer;

/**
* Utility for copying files from the Internet to local disk
* Example: 1. java copyURL http://www.patriot.net/users/anil/resume/resume.gif
*
* 2. java copyURL http://www.ibm.com/index.html abcd.html
*/
public class copyURL
{
public static void main(String args[])
{
if (args.length < 1)
{
System.err.println("usage: java copyURL URL [LocalFile]");
System.exit(1);
}
try
{
URL url = new URL(args[0]);
System.out.println("Opening connection to " + args[0] + "...");
URLConnection urlC = url.openConnection();
// Copy resource to local file, use remote file
// if no local file name specified
InputStream is = url.openStream();
// Print info about resource
System.out.print("Copying resource (type: " +
urlC.getContentType());
Date date=new Date(urlC.getLastModified());
System.out.println(", modified on: " + date.toLocaleString() + ")...");
System.out.flush();
FileOutputStream fos=null;

if (args.length < 2)
{
String localFile=null;
// Get only file name
StringTokenizer st=new StringTokenizer(url.getFile(), "/");

while (st.hasMoreTokens())
localFile=st.nextToken();
fos = new FileOutputStream(localFile);
}
else
fos = new FileOutputStream(args[1]);

int oneChar, count=0;
while ((oneChar=is.read()) != -1)
{
fos.write(oneChar);
count++;
}

is.close();
fos.close();
System.out.println(count + " byte(s) copied");
}
catch (MalformedURLException e)
{
System.err.println(e.toString());
}
catch (IOException e)
{
System.err.println(e.toString());
}
}
}