通过Socket实现文件传输(Java)

这个简单的例子将演示应用Java实现客户端与服务器端传输文件的方法。

服务器端源代码：

01. import java.net.*;
02. import java.io.*;
03.
04. public class FileServer {
05.   public static void main (String [] args ) throws IOException {
06.     // create socket
07.     ServerSocket servsock = new ServerSocket(13267);
08.     while (true) {
09.       System.out.println("Waiting...");
10.
11.       Socket sock = servsock.accept();
12.       System.out.println("Accepted connection : " + sock);
13.
14.       // sendfile
15.       File myFile = new File ("source.pdf");
16.       byte [] mybytearray  = new byte [(int)myFile.length()];
17.       FileInputStream fis = new FileInputStream(myFile);
18.       BufferedInputStream bis = new BufferedInputStream(fis);
19.       bis.read(mybytearray,0,mybytearray.length);
20.       OutputStream os = sock.getOutputStream();
21.       System.out.println("Sending...");
22.       os.write(mybytearray,0,mybytearray.length);
23.       os.flush();
24.       sock.close();
25.       }
26.     }
27. }

客户端源代码：

01. import java.net.*;
02. import java.io.*;
03.
04. public class FileClient{
05.   public static void main (String [] args ) throws IOException {
06.     int filesize=6022386; // filesize temporary hardcoded
07.
08.     long start = System.currentTimeMillis();
09.     int bytesRead;
10.     int current = 0;
11.     // localhost for testing
12.     Socket sock = new Socket("127.0.0.1",13267);
13.     System.out.println("Connecting...");
14.
15.     // receive file
16.     byte [] mybytearray  = new byte [filesize];
17.     InputStream is = sock.getInputStream();
18.     FileOutputStream fos = new FileOutputStream("source-copy.pdf");
19.     BufferedOutputStream bos = new BufferedOutputStream(fos);
20.     bytesRead = is.read(mybytearray,0,mybytearray.length);
21.     current = bytesRead;
22.
23.     // thanks to A. Cádiz for the bug fix
24.     do {
25.        bytesRead =
26.           is.read(mybytearray, current, (mybytearray.length-current));
27.        if(bytesRead >= 0) current += bytesRead;
28.     } while(bytesRead > -1);
29.
30.     bos.write(mybytearray, 0 , current);
31.     bos.flush();
32.     long end = System.currentTimeMillis();
33.     System.out.println(end-start);
34.     bos.close();
35.     sock.close();
36.   }
37. }

查看原文 Real’s Java How To

 

 

 

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