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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