[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());
           }
     }
}

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