這是服務器

打開文件流并將其發送到網絡

import java.io.BufferedInputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.IOException;

import java.io.OutputStream;

import java.net.ServerSocket;

import java.net.Socket;

public class SimpleFileServer {

public final static int SOCKET_PORT = 5501;

public final static String FILE_TO_SEND = "file.txt";

public static void main (String [] args ) throws IOException {

FileInputStream fis = null;

BufferedInputStream bis = null;

OutputStream os = null;

ServerSocket servsock = null;

Socket sock = null;

try {

servsock = new ServerSocket(SOCKET_PORT);

while (true) {

System.out.println("Waiting...");

try {

sock = servsock.accept();

System.out.println("Accepted connection : " + sock);

// send file

File myFile = new File (FILE_TO_SEND);

byte [] mybytearray = new byte [(int)myFile.length()];

fis = new FileInputStream(myFile);

bis = new BufferedInputStream(fis);

bis.read(mybytearray,0,mybytearray.length);

os = sock.getOutputStream();

System.out.println("Sending " + FILE_TO_SEND + "(" + mybytearray.length + " bytes)");

os.write(mybytearray,0,mybytearray.length);

os.flush();

System.out.println("Done.");

} catch (IOException ex) {

System.out.println(ex.getMessage()+": An Inbound Connection Was Not Resolved");

}

}finally {

if (bis != null) bis.close();

if (os != null) os.close();

if (sock!=null) sock.close();

}

}

}

finally {

if (servsock != null)

servsock.close();

}

}

}這是客戶

重新發送通過網絡發送的文件

import java.io.BufferedOutputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.net.Socket;

public class SimpleFileClient {

public final static int SOCKET_PORT = 5501;

public final static String SERVER = "127.0.0.1";

public final static String

FILE_TO_RECEIVED = "file-rec.txt";

public final static int FILE_SIZE = Integer.MAX_VALUE;

public static void main (String [] args ) throws IOException {

int bytesRead;

int current = 0;

FileOutputStream fos = null;

BufferedOutputStream bos = null;

Socket sock = null;

try {

sock = new Socket(SERVER, SOCKET_PORT);

System.out.println("Connecting...");

// receive file

byte [] mybytearray = new byte [FILE_SIZE];

InputStream is = sock.getInputStream();

fos = new FileOutputStream(FILE_TO_RECEIVED);

bos = new BufferedOutputStream(fos);

bytesRead = is.read(mybytearray,0,mybytearray.length);

current = bytesRead;

do {

bytesRead =

is.read(mybytearray, current, (mybytearray.length-current));

if(bytesRead >= 0) current += bytesRead;

} while(bytesRead > -1);

bos.write(mybytearray, 0 , current);

bos.flush();

System.out.println("File " + FILE_TO_RECEIVED

+ " downloaded (" + current + " bytes read)");

}

finally {

if (fos != null) fos.close();

if (bos != null) bos.close();

if (sock != null) sock.close();

}

}

}

總結

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