URL file Download and Save in the Local Directory

This Program file download from URL and save this Url File in the specified directory. This program specifies the directory path where the files to be stored as first command line argument and second command line arguments specifies URL File to be stored. Java creates link between Url and Java application.Using the openConnection() method creates URLConnection object. This connection read the data using InputStream and FileOutputStream write the data to the local file in a specified directory.

Source Code : "UrlDownload.java"


import java.io.*;

import java.net.*;



public class UrlDownload {

final static int size=1024;

public static void

fileUrl(String fAddress, String

localFileName, String destinationDir) {

OutputStream outStream = null;

URLConnection  uCon = null;



InputStream is = null;

try {

URL Url;

byte[] buf;

int ByteRead,ByteWritten=0;

Url= new URL(fAddress);

outStream = new BufferedOutputStream(new

FileOutputStream(destinationDir+"\\"+localFileName));



uCon = Url.openConnection();

is = uCon.getInputStream();

buf = new byte[size];

while ((ByteRead = is.read(buf)) != -1) {

outStream.write(buf, 0, ByteRead);

ByteWritten += ByteRead;

}

System.out.println("Downloaded Successfully.");

System.out.println("File name:\""+localFileName+ "\"\nNo ofbytes :" + ByteWritten);

}

catch (Exception e) {

e.printStackTrace();

}

finally {

try {

is.close();

outStream.close();

}

catch (IOException e) {

e.printStackTrace();

}}}

public static void fileDownload(String fAddress, String destinationDir)

{

 

  int slashIndex =fAddress.lastIndexOf('/');

int periodIndex =fAddress.lastIndexOf('.');



String fileName=fAddress.substring(slashIndex + 1);



if (periodIndex >=1 &&  slashIndex >= 0 && slashIndex < fAddress.length()-1)

{

fileUrl(fAddress,fileName,destinationDir);

}

else

{

System.err.println("path or file name.");

}}

public static void main(String[] args)

{



if(args.length==2)

{

for (int i = 1; i < args.length; i++) {

fileDownload(args[i],args[0]);

}

}

else{

  

}

}

}

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