Android socket编程2

import java.io.*; import java.net.*; import java.util.*; class SSServer { public static void main (String [] args) throws IOException { System.out.println ("Server starting...\n"); // Create a server socket that listens for incoming connection // requests on port 10000. ServerSocket server = new ServerSocket (10000); while (true) { // Listen for incoming connection requests from client // programs, establish a connection, and return a Socket // object that represents this connection. Socket s = server.accept (); System.out.println ("Accepting Connection...\n"); // Start a thread to handle the connection. new ServerThread (s).start (); } } } class ServerThread extends Thread { private Socket s; ServerThread (Socket s) { this.s = s; } public void run () { BufferedReader br = null; PrintWriter pw = null; try { // Create an input stream reader that chains to the socket's // byte-oriented input stream. The input stream reader // converts bytes read from the socket to characters. The // conversion is based on the platform's default character // set. InputStreamReader isr; isr = new InputStreamReader (s.getInputStream ()); // Create a buffered reader that chains to the input stream // reader. The buffered reader supplies a convenient method // for reading entire lines of text. br = new BufferedReader (isr); // Create a print writer that chains to the socket's byte- // oriented output stream. The print writer creates an // intermediate output stream writer that converts // characters sent to the socket to bytes. The conversion // is based on the platform's default character set. pw = new PrintWriter (s.getOutputStream (), true); // Create a calendar that makes it possible to obtain date // and time information. Calendar c = Calendar.getInstance (); // Because the client program may send multiple commands, a // loop is required. Keep looping until the client either // explicitly requests termination by sending a command // beginning with letters BYE or implicitly requests // termination by closing its output stream. do { // Obtain the client program's next command. String cmd = br.readLine (); // Exit if client program has closed its output stream. if (cmd == null) break; // Convert command to uppercase, for ease of comparison. cmd = cmd.toUpperCase (); // If client program sends BYE command, terminate. if (cmd.startsWith ("BYE")) break; // If client program sends DATE or TIME command, return // current date/time to the client program. if (cmd.startsWith ("DATE") || cmd.startsWith ("TIME")) pw.println (c.getTime ().toString ()); // If client program sends DOM (Day Of Month) command, // return current day of month to the client program. if (cmd.startsWith ("DOM")) pw.println ("" + c.get (Calendar.DAY_OF_MONTH)); // If client program sends DOW (Day Of Week) command, // return current weekday (as a string) to the client // program. if (cmd.startsWith ("DOW")) switch (c.get (Calendar.DAY_OF_WEEK)) { case Calendar.SUNDAY : pw.println ("SUNDAY"); break; case Calendar.MONDAY : pw.println ("MONDAY"); break; case Calendar.TUESDAY : pw.println ("TUESDAY"); break; case Calendar.WEDNESDAY: pw.println ("WEDNESDAY"); break; case Calendar.THURSDAY : pw.println ("THURSDAY"); break; case Calendar.FRIDAY : pw.println ("FRIDAY"); break; case Calendar.SATURDAY : pw.println ("SATURDAY"); } // If client program sends DOY (Day of Year) command, // return current day of year to the client program. if (cmd.startsWith ("DOY")) pw.println ("" + c.get (Calendar.DAY_OF_YEAR)); // If client program sends PAUSE command, sleep for three // seconds. if (cmd.startsWith ("PAUSE")) try { Thread.sleep (3000); }catch (InterruptedException e) { } } while (true); }catch (IOException e) { System.out.println (e.toString ()); } finally { System.out.println ("Closing Connection...\n"); try { if (br != null) br.close (); if (pw != null) pw.close (); if (s != null) s.close (); }catch (IOException e) { } } } }