java编写的类似问卷调查 C/S模式

 

TriviaServer 程序

import java.io.*; import java.net.*; import java.util.Random; public class TriviaServer extends Thread { private static final int WAIT_FOR_CLIENT = 0; private static final int WAIT_FOR_ANSWER = 1; private static final int WAIT_FOR_CONFIRM = 2; private String[] questions; private String[] answers; private ServerSocket sock; private int numQuestions; private int num = 0; private int state = WAIT_FOR_CLIENT; private Random rand = new Random(); public TriviaServer() { super("TriviaServer"); try { sock = new ServerSocket(4413); System.out.println("TriviaServer up and running ..."); } catch (IOException e) { System.err.println("Error: couldn't create socket."); System.exit(1); } } public static void main(String[] arguments) { TriviaServer server = new TriviaServer(); server.start(); } public void run() { Socket client = null; // Initialize the question and answer data if (!loadData()) { System.err.println("Error: couldn't initialize Q&A data."); return; } // Look for clients and ask trivia questions while (true) { // Wait for a client if (sock == null) return; try { client = sock.accept(); } catch (IOException e) { System.err.println("Error: couldn't connect to client."); System.exit(1); } // Process questions and answers try { InputStreamReader isr = new InputStreamReader( client.getInputStream()); BufferedReader is = new BufferedReader(isr); PrintWriter os = new PrintWriter(new BufferedOutputStream(client.getOutputStream()), false); String outLine; // Output server request outLine = processInput(null); os.println(outLine); os.flush(); // Process and output user input while (true) { String inLine = is.readLine(); if (inLine.length() > 0) outLine = processInput(inLine); else outLine = processInput(""); os.println(outLine); os.flush(); if (outLine.equals("Bye.")) break; } // Clean up os.close(); is.close(); client.close(); } catch (Exception e) { System.err.println("Error: " + e); e.printStackTrace(); System.exit(1); } } } private boolean loadData() { try { File inFile = new File("qna.txt"); FileInputStream inStream = new FileInputStream(inFile); byte[] data = new byte[(int)inFile.length()]; // Read questions and answers into a byte array if (inStream.read(data) <= 0) { System.err.println("Error: couldn't read q&a."); return false; } // See how many question/answer pairs there are for (int i = 0; i < data.length; i++) if (data[i] == (byte)'#') numQuestions++; numQuestions /= 2; questions = new String[numQuestions]; answers = new String[numQuestions]; // Parse questions and answers into String arrays int start = 0, index = 0; boolean isQuestion = true; for (int i = 0; i < data.length; i++) if (data[i] == (byte)'#') { if (isQuestion) { questions[index] = new String(data, start, i - start); isQuestion = false; } else { answers[index] = new String(data, start, i - start); //去掉answers里的换行和回车 利用正则 answers[index]=answers[index].replaceAll("//s+", ""); isQuestion = true; index++; } start = i + 3; } } catch (FileNotFoundException e) { System.err.println("Exception: couldn't find the Q&A file."); return false; } catch (IOException e) { System.err.println("Exception: couldn't read the Q&A file."); return false; } for(int i=0;i<answers.length;i++) { System.out.println(questions[i]+ answers[i]); } return true; } String processInput(String inStr) { String outStr = null; switch (state) { case WAIT_FOR_CLIENT: // Ask a question outStr = questions[num]; state = WAIT_FOR_ANSWER; break; case WAIT_FOR_ANSWER: // Check the answer if (inStr.equalsIgnoreCase(answers[num])) outStr="/015/012That's correct! /015/012Want another (y/n)?"; else outStr="/015/012Wrong, the correct answer is " + answers[num] +". /015/012Want another (y/n)?"; state = WAIT_FOR_CONFIRM; break; case WAIT_FOR_CONFIRM: // See if they want another question if (!inStr.equalsIgnoreCase("N")) { num = Math.abs(rand.nextInt()) % questions.length; outStr = questions[num]; state = WAIT_FOR_ANSWER; } else { outStr = "Bye."; state = WAIT_FOR_CLIENT; } break; } return outStr; } } 

 

问题答案的文本文档.txt

Which one of the Smothers Brothers did Bill Cosby once punch out? (a) Dick (b) Tommy (c) both# b# What's the nickname of Dallas Cowboys fullback Daryl Johnston? (a) caribou (b) moose (c) elk# b# What is triskaidekaphobia? (a) fear of tricycles (b) fear of the number 13 (c) fear of kaleidoscopes# b# What southern state is most likely to have an earthquake? (a) Florida (b) Arkansas (c) South Carolina# c# Which person at Sun Microsystems came up with the name Java in early 1995? (a) James Gosling (b) Kim Polese (c) Alan Baratz# b# Which figure skater is the sister of Growing Pains star Joanna Kerns? (a) Dorothy Hamill (b) Katarina Witt (c) Donna De Varona# c# When this Old Man plays four, what does he play knick-knack on? (a) His shoe (b) His door (c) His knee# b# What National Hockey League team once played as the Winnipeg Jets? (a) The Phoenix Coyotes (b) The Florida Panthers (c) The Colorado Avalanche# a# David Letterman uses the stage name "Earl Hofert" when he appears in movies. Who is Earl? (a) A crew member on his show (b) His grandfather (c) A character on Green Acres# b# Who created Superman? (a) Bob Kane (b) Jerome Siegel and Joe Shuster (c) Stan Lee and Jack Kirby# b# 

 

启动TriviaServer 后 利用window自带的telnet localhost 4413即可