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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