Java套接字编程(上) - 编程入门网
作者 佚名技术
来源 NET编程
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发布时间 2012-06-22
| 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 (" |
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