巧了,我前不久刚好作了这样的一组程序,功能跟你说的差不多,你少作修改就可以用了。// SendFile.java
import java.io.*;
import java.net.*;
import java.text.*;public class SendFile
{
public static void main( String args[] )
{
InetAddress IP;
int Port;
byte SendBuf[];
Socket SendSock;
long RstAt = 0;
if ( args.length != 3 )
{
System.out.println( "Usage: SendFile IP port filename" );
return;
}
try { // Convert the remote IP addreSendSock.
IP = InetAddress.getByName( args[0] );
}
catch( UnknownHostException e )
{
System.out.println( "ERROR: Invalid IP address: "+e.getMessage() );
return;
}
Port = (new Integer( args[1] )).intValue(); // Convert the UDP port.
if ( (SendBuf = new byte[BUF_LENGTH]) == null )
{
System.out.println( "ERROR: can't create the send buffer." );
return;
}
try {
System.out.print( "Connecting to " + IP.getHostAddress() + " : " + Port );
SendSock = new Socket( IP, Port );
SendSock.setSoTimeout( SOCKET_TIMEOUT );
OutputStream os = SendSock.getOutputStream();
System.out.println( "\nOK ! " + SendSock.getInetAddress().getHostAddress() + " connected." ); System.out.println( "Opening file: " + args[2] );
long FileLength = (new File( args[2] )).length() - RstAt;
FileInputStream ifs = new FileInputStream( args[2] );
ifs.skip( RstAt ); // Send the length of file.
System.out.println( "File length: "+FileLength );
SendBuf[0] = (byte)(FileLength & 0xff);
SendBuf[1] = (byte)((FileLength >> 8) & 0xff);
SendBuf[2] = (byte)((FileLength >> 16) & 0xff);
SendBuf[3] = (byte)((FileLength >> 24) & 0xff);
SendBuf[4] = (byte)((FileLength >> 32) & 0xff);
SendBuf[5] = (byte)((FileLength >> 40) & 0xff);
SendBuf[6] = (byte)((FileLength >> 48) & 0xff);
SendBuf[7] = (byte)((FileLength >> 56) & 0xff);
os.write( SendBuf, 0, 8 );
// Send the restart point.
System.out.println( "Restart at: "+RstAt);
SendBuf[0] = (byte)(RstAt & 0xff);
SendBuf[1] = (byte)((RstAt >> 8) & 0xff);
SendBuf[2] = (byte)((RstAt >> 16) & 0xff);
SendBuf[3] = (byte)((RstAt >> 24) & 0xff);
SendBuf[4] = (byte)((RstAt >> 32) & 0xff);
SendBuf[5] = (byte)((RstAt >> 40) & 0xff);
SendBuf[6] = (byte)((RstAt >> 48) & 0xff);
SendBuf[7] = (byte)((RstAt >> 56) & 0xff);
os.write( SendBuf, 0, 8 ); System.out.println( "Transferring the file..." );
int Count = 0;
try {
for( Count = 0; Count < (FileLength / BUF_LENGTH); Count ++ )
{
ifs.read( SendBuf, 0, BUF_LENGTH );
os.write( SendBuf );
}
ifs.read( SendBuf, 0, (int)(FileLength - BUF_LENGTH * Count) );
os.write( SendBuf, 0, (int)(FileLength - BUF_LENGTH * Count) );
} catch( IOException e )
{
System.out.println( "ERROR: " + e.getMessage() );
System.out.println( (Count*BUF_LENGTH) + " bytes finished." );
return;
}
System.out.println( "Transfer OK !" );
}
catch( Exception e )
{
System.out.println( "ERROR: " + e.getMessage() );
return;
}
} static int BUF_LENGTH = 1024;
static int SOCKET_TIMEOUT = 60000;
}
// RecvFile.java
import java.io.*;
import java.net.*;
import java.text.*;public class RecvFile
{
public static void main( String args[] )
{
int Port;
byte RecvBuf[];
ServerSocket ConnectSock;
long RstAt = 0;
if ( args.length != 2 )
{
System.out.println( "Usage: RecvFile port filename" );
return;
}
Port = (new Integer( args[0] )).intValue(); // Convert the UDP port.
if ( (RecvBuf = new byte[BUF_LENGTH]) == null )
{
System.out.println( "ERROR: can't create the send buffer." );
return;
}
try {
System.out.print( "Waiting connection at port: " + Port );
ConnectSock = new ServerSocket( Port );
ConnectSock.setSoTimeout( SOCKET_TIMEOUT );
Socket RecvSock = ConnectSock.accept();
RecvSock.setSoTimeout( SOCKET_TIMEOUT );
InputStream is = RecvSock.getInputStream();
System.out.println( "\nOK ! " + RecvSock.getInetAddress().getHostAddress() + " connected." ); System.out.println( "Creating file: " + args[1] );
FileOutputStream ofs;
// Receive the length of file.
is.read( RecvBuf, 0, 8 );
long FileLength = RecvBuf[0] & 0xff;
FileLength += (RecvBuf[1] << 8) & 0xff00l;
FileLength += (RecvBuf[2] << 16) & 0xff0000l;
FileLength += (RecvBuf[3] << 24) & 0xff000000l;
FileLength += (RecvBuf[4] << 32) & 0xff00000000l;
FileLength += (RecvBuf[5] << 40) & 0xff0000000000l;
FileLength += (RecvBuf[6] << 48) & 0xff000000000000l;
FileLength += (RecvBuf[7] << 56) & 0xff00000000000000l;
// Receive the restart point.
is.read( RecvBuf, 0, 8 );
RstAt = RecvBuf[0] & 0xff;
RstAt += (RecvBuf[1] << 8) & 0xff00l;
RstAt += (RecvBuf[2] << 16) & 0xff0000l;
RstAt += (RecvBuf[3] << 24) & 0xff000000l;
RstAt += (RecvBuf[4] << 32) & 0xff00000000l;
RstAt += (RecvBuf[5] << 40) & 0xff0000000000l;
RstAt += (RecvBuf[6] << 48) & 0xff000000000000l;
RstAt += (RecvBuf[7] << 56) & 0xff00000000000000l;
if ( RstAt == 0 )
ofs = new FileOutputStream( args[1], false );
else
ofs = new FileOutputStream( args[1], true ); System.out.println( "Receiving the file for " + FileLength + " bytes ..." );
System.out.println( "Restart at: "+RstAt );
int Count = 0;
try {
for( Count = 0; Count < (FileLength / BUF_LENGTH); Count ++ )
{
is.read( RecvBuf, 0, BUF_LENGTH );
ofs.write( RecvBuf, 0, BUF_LENGTH );
}
is.read( RecvBuf, 0, (int)(FileLength - BUF_LENGTH * Count) );
ofs.write( RecvBuf, 0, (int)(FileLength - BUF_LENGTH * Count) );
} catch( IOException e )
{
System.out.println( "ERROR: " + e.getMessage() );
System.out.println( (Count*BUF_LENGTH) + " bytes finished." );
return;
} System.out.println( "Transfer OK !" );
}
catch( Exception e )
{
System.out.println( "ERROR: " + e.getMessage() );
return;
}
} static int BUF_LENGTH = 1024;
static int SOCKET_TIMEOUT = 60000;
}
import java.io.*;
import java.net.*;
import java.text.*;public class SendFile
{
public static void main( String args[] )
{
InetAddress IP;
int Port;
byte SendBuf[];
Socket SendSock;
long RstAt = 0;
if ( args.length != 3 )
{
System.out.println( "Usage: SendFile IP port filename" );
return;
}
try { // Convert the remote IP addreSendSock.
IP = InetAddress.getByName( args[0] );
}
catch( UnknownHostException e )
{
System.out.println( "ERROR: Invalid IP address: "+e.getMessage() );
return;
}
Port = (new Integer( args[1] )).intValue(); // Convert the UDP port.
if ( (SendBuf = new byte[BUF_LENGTH]) == null )
{
System.out.println( "ERROR: can't create the send buffer." );
return;
}
try {
System.out.print( "Connecting to " + IP.getHostAddress() + " : " + Port );
SendSock = new Socket( IP, Port );
SendSock.setSoTimeout( SOCKET_TIMEOUT );
OutputStream os = SendSock.getOutputStream();
System.out.println( "\nOK ! " + SendSock.getInetAddress().getHostAddress() + " connected." ); System.out.println( "Opening file: " + args[2] );
long FileLength = (new File( args[2] )).length() - RstAt;
FileInputStream ifs = new FileInputStream( args[2] );
ifs.skip( RstAt ); // Send the length of file.
System.out.println( "File length: "+FileLength );
SendBuf[0] = (byte)(FileLength & 0xff);
SendBuf[1] = (byte)((FileLength >> 8) & 0xff);
SendBuf[2] = (byte)((FileLength >> 16) & 0xff);
SendBuf[3] = (byte)((FileLength >> 24) & 0xff);
SendBuf[4] = (byte)((FileLength >> 32) & 0xff);
SendBuf[5] = (byte)((FileLength >> 40) & 0xff);
SendBuf[6] = (byte)((FileLength >> 48) & 0xff);
SendBuf[7] = (byte)((FileLength >> 56) & 0xff);
os.write( SendBuf, 0, 8 );
// Send the restart point.
System.out.println( "Restart at: "+RstAt);
SendBuf[0] = (byte)(RstAt & 0xff);
SendBuf[1] = (byte)((RstAt >> 8) & 0xff);
SendBuf[2] = (byte)((RstAt >> 16) & 0xff);
SendBuf[3] = (byte)((RstAt >> 24) & 0xff);
SendBuf[4] = (byte)((RstAt >> 32) & 0xff);
SendBuf[5] = (byte)((RstAt >> 40) & 0xff);
SendBuf[6] = (byte)((RstAt >> 48) & 0xff);
SendBuf[7] = (byte)((RstAt >> 56) & 0xff);
os.write( SendBuf, 0, 8 ); System.out.println( "Transferring the file..." );
int Count = 0;
try {
for( Count = 0; Count < (FileLength / BUF_LENGTH); Count ++ )
{
ifs.read( SendBuf, 0, BUF_LENGTH );
os.write( SendBuf );
}
ifs.read( SendBuf, 0, (int)(FileLength - BUF_LENGTH * Count) );
os.write( SendBuf, 0, (int)(FileLength - BUF_LENGTH * Count) );
} catch( IOException e )
{
System.out.println( "ERROR: " + e.getMessage() );
System.out.println( (Count*BUF_LENGTH) + " bytes finished." );
return;
}
System.out.println( "Transfer OK !" );
}
catch( Exception e )
{
System.out.println( "ERROR: " + e.getMessage() );
return;
}
} static int BUF_LENGTH = 1024;
static int SOCKET_TIMEOUT = 60000;
}
// RecvFile.java
import java.io.*;
import java.net.*;
import java.text.*;public class RecvFile
{
public static void main( String args[] )
{
int Port;
byte RecvBuf[];
ServerSocket ConnectSock;
long RstAt = 0;
if ( args.length != 2 )
{
System.out.println( "Usage: RecvFile port filename" );
return;
}
Port = (new Integer( args[0] )).intValue(); // Convert the UDP port.
if ( (RecvBuf = new byte[BUF_LENGTH]) == null )
{
System.out.println( "ERROR: can't create the send buffer." );
return;
}
try {
System.out.print( "Waiting connection at port: " + Port );
ConnectSock = new ServerSocket( Port );
ConnectSock.setSoTimeout( SOCKET_TIMEOUT );
Socket RecvSock = ConnectSock.accept();
RecvSock.setSoTimeout( SOCKET_TIMEOUT );
InputStream is = RecvSock.getInputStream();
System.out.println( "\nOK ! " + RecvSock.getInetAddress().getHostAddress() + " connected." ); System.out.println( "Creating file: " + args[1] );
FileOutputStream ofs;
// Receive the length of file.
is.read( RecvBuf, 0, 8 );
long FileLength = RecvBuf[0] & 0xff;
FileLength += (RecvBuf[1] << 8) & 0xff00l;
FileLength += (RecvBuf[2] << 16) & 0xff0000l;
FileLength += (RecvBuf[3] << 24) & 0xff000000l;
FileLength += (RecvBuf[4] << 32) & 0xff00000000l;
FileLength += (RecvBuf[5] << 40) & 0xff0000000000l;
FileLength += (RecvBuf[6] << 48) & 0xff000000000000l;
FileLength += (RecvBuf[7] << 56) & 0xff00000000000000l;
// Receive the restart point.
is.read( RecvBuf, 0, 8 );
RstAt = RecvBuf[0] & 0xff;
RstAt += (RecvBuf[1] << 8) & 0xff00l;
RstAt += (RecvBuf[2] << 16) & 0xff0000l;
RstAt += (RecvBuf[3] << 24) & 0xff000000l;
RstAt += (RecvBuf[4] << 32) & 0xff00000000l;
RstAt += (RecvBuf[5] << 40) & 0xff0000000000l;
RstAt += (RecvBuf[6] << 48) & 0xff000000000000l;
RstAt += (RecvBuf[7] << 56) & 0xff00000000000000l;
if ( RstAt == 0 )
ofs = new FileOutputStream( args[1], false );
else
ofs = new FileOutputStream( args[1], true ); System.out.println( "Receiving the file for " + FileLength + " bytes ..." );
System.out.println( "Restart at: "+RstAt );
int Count = 0;
try {
for( Count = 0; Count < (FileLength / BUF_LENGTH); Count ++ )
{
is.read( RecvBuf, 0, BUF_LENGTH );
ofs.write( RecvBuf, 0, BUF_LENGTH );
}
is.read( RecvBuf, 0, (int)(FileLength - BUF_LENGTH * Count) );
ofs.write( RecvBuf, 0, (int)(FileLength - BUF_LENGTH * Count) );
} catch( IOException e )
{
System.out.println( "ERROR: " + e.getMessage() );
System.out.println( (Count*BUF_LENGTH) + " bytes finished." );
return;
} System.out.println( "Transfer OK !" );
}
catch( Exception e )
{
System.out.println( "ERROR: " + e.getMessage() );
return;
}
} static int BUF_LENGTH = 1024;
static int SOCKET_TIMEOUT = 60000;
}
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