代码黑马程序员java教程：tcp协议服务端多线程技术

TCP协议服务端多线程技术

代码

UploadTask. java

1. import java.net.Socket;

2. import java. io. InputStream;

3. import java. io.FileOutputStream;

4. import java. io.File;

5. import java. io.OutputStream;

6.

7. public class UploadTask implements Runnable

8. {

9. private Socket s;

10.

11. public UploadTask(Socket s) {

12. this. s = s;

13. }

14.

15. public void run() {

16.

17. int count = 0;

18.

19. String ip = s.getInetAddress() .getHostAddress() ;

20. System.out.println(ip + ". . . . . .connected") ;

21.

22. try{

23. InputStream in = s.getInputStream() ;

24.

25. File dir = new File("c:\\pic") ;

26. if(!dir.exists() ) {

27. dir.mkdirs() ;

28. }

29. File file = new File(dir, ip + ".bmp") ;

30.

31. //如果文件已经存在于服务端。

32. while(file.exists() ) {

33. file = new File(dir, ip + "(" + (++count) + ") .bmp") ;

34. }

35.

36. FileOutputStream fos = new FileOutputStream(file) ;

37.

38. byte[] buf = new byte[1024] ;

39.

40. int len = 0;

41.

42. while( (len = in.read(buf) ) != -1) {

43. fos.write(buf,0, len) ;

44. }

45.

46. OutputStream out = s.getOutputStream() ;

47.

48. out.write("上传成功".getBytes() ) ;

49.

50. fos. close() ;

51. s. close() ;

52. }catch(Exception e) {

53. e.printStackTrace() ;

54. }

55. }

56. }

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UploadServerDemo. java

1. import java. io. IOException;

2. import java.net.ServerSocket;

3. import java.net.Socket;

4. import java. io. InputStream;

5. import java. io.File;

6. import java. io.FileOutputStream;

7. import java. io.OutputStream;

8. import java. io.FileNotFoundException;

9. import java. io. IOException;

10.

11. public class UploadPicServer

12. {

13. public static voidmain(String[] args) throws FileNotFoundException, IOException{

14.

15. ServerSocket ss = new ServerSocket(10006) ;

16.

17. while(true) {

18. Socket s = ss.accept() ;

19. new Thread(new UploadTask(s) ) . start() ;

20. }

21.

22. //ss. close() ;

23. }

24. }

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