我開發的首個軟件系統

雖然它很小，也顯得很幼稚，但我很有成就感，因爲這是我寫的第一個有實際意義的軟件系統——競賽答題系統。

初中就寫出過一個程序，ActionScript的，爲了完成《輝煌二中》那個動畫；從高二開始，寫得程序都是爲了學習數據結構、算法，爲了解題；上了大學，寫得程序是爲了學java；而今天，終於能用程序做個有實際應用價值的小東西了，高中奧賽時的成就感又回來了！哈哈！

 

當然，這套答題系統仍然不完善，其實它範了不少編程時的“禁忌”，我爲了完成功能，就。。。。（太功利了，呵呵）

 

提供源代碼，供大家交流：

 

Server端：

package qAnswer; import java.awt.*; import java.awt.event.*; import javax.swing.*; import java.net.*; import java.util.*; import java.util.List; import java.io.*; public class Server extends JFrame{ static int i; String ans = "", ansPath = "d:/data/ans.txt", qPath = "d:/data/data"; boolean succ = true; FileReader fr = null; BufferedReader br = null; JButton prev = new JButton("上一題"); JButton next = new JButton("下一題"); JButton distribute = new JButton("發題"); JLabel jl1 = new JLabel("正確答案是："); JLabel corAns = new JLabel("correct answer"); JLabel jl3 = new JLabel("各隊答案："); JLabel jl4 = new JLabel("各隊連接情況："); JTextArea taConn = new JTextArea(); JTextArea taAns = new JTextArea(); JTextArea taQues = new JTextArea(); JPanel jps = new JPanel(new FlowLayout()); JPanel jp2 = new JPanel(new GridLayout(1,2)); JPanel jpw = new JPanel(); JPanel jpe = new JPanel(); JPanel jpdown = new JPanel(new BorderLayout()); ServerSocket ss = null; Socket s = null; List<QClient> clients = new ArrayList<QClient>(); DataInputStream disName = null; Server(){ super("服務器端"); } public static void main(String[] args) { new Server().launchFrame(); } private void launchFrame() { this.setLayout(new GridLayout(2,1)); jps.add(prev); prev.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { getPreviousQuestion(); } }); jps.add(next); next.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { getNextQuestion(); } }); jps.add(distribute); distribute.addActionListener(new DisMonitor()); jps.add(jl1); jps.add(corAns); jpw.setLayout(new BorderLayout()); jpw.add(jl4,BorderLayout.NORTH); jpw.add(taConn,BorderLayout.CENTER); jpe.setLayout(new BorderLayout()); jpe.add(jl3,BorderLayout.NORTH); jpe.add(taAns,BorderLayout.CENTER); jp2.add(jpe); jp2.add(jpw); jpdown.add(jp2); jpdown.add(jps,BorderLayout.SOUTH); this.add(taQues); this.add(jpdown); this.setBounds(100, 100, 600, 600); this.setVisible(true); this.addWindowListener(new WindowAdapter(){ public void windowClosing(WindowEvent e){ try { succ = false; if(fr != null) fr.close(); if(br != null) br.close(); if(s != null) s.close(); if(ss != null) ss.close(); if (disName != null) disName.close(); } catch (IOException e1) { e1.printStackTrace(); } System.exit(0); } }); getAns(); connect(); } private void connect() { String name = null; try { ss = new ServerSocket(6666); while (succ) { s = ss.accept(); disName = new DataInputStream(s.getInputStream()); name = disName.readUTF(); QClient c = new QClient(s, name); clients.add(c); new Thread(c).start(); taConn.setText(name + " connected!" + '/n' + taConn.getText()); } } catch (SocketException e) { try { succ = false; if(fr != null) fr.close(); if(br != null) br.close(); if(s != null) s.close(); if(ss != null) ss.close(); if (disName != null) disName.close(); } catch (IOException e1) { e1.printStackTrace(); } System.exit(0); } catch (IOException e) { e.printStackTrace(); } } private class DisMonitor implements ActionListener{ public void actionPerformed(ActionEvent e){ for (int i = 0; i < clients.size(); i++){ QClient qc = clients.get(i); send(qc); } taAns.setText("==============" + '/n' + taAns.getText()); } private void send(QClient qc) { try { qc.dos.writeUTF(taQues.getText()); } catch (SocketException e){ clients.remove(this); } catch (IOException e1) { e1.printStackTrace(); } } } private class QClient implements Runnable{ private DataInputStream dis = null; private DataOutputStream dos = null; String str = null; String name = null; Socket s = null; public QClient(Socket s, String name) { this.s = s; this.name = name; try { dis = new DataInputStream(s.getInputStream()); dos = new DataOutputStream(s.getOutputStream()); } catch (IOException e) { e.printStackTrace(); } } public void run() { try { while(true){ str = dis.readUTF(); if (str.equals("quit")) taConn.setText(this.name + " has quited!" + '/n' + taConn.getText()); else taAns.setText(name + "： " + str + '/n' + taAns.getText()); } } catch (SocketException e){ taConn.setText("a client quit!" + '/n' + taConn.getText()); } catch (EOFException e){ taConn.setText("a client quit!" + '/n' + taConn.getText()); } catch (IOException e) { e.printStackTrace(); } finally { try { if (dis != null) dis.close(); if (dos != null) dos.close(); } catch (IOException e) { e.printStackTrace(); } } } } private void getAns() { String str; try { fr = new FileReader(ansPath); br = new BufferedReader(fr); while ((str = br.readLine()) != null){ ans += str; } } catch (FileNotFoundException e) { taQues.setText("沒有找到數據！請將答案放到 " + ansPath + "位置"); } catch (IOException e) { e.printStackTrace(); } } private void getPreviousQuestion() { String str = "no answer"; try { fr = new FileReader(qPath + ( --i ) + ".txt"); br = new BufferedReader(fr); taQues.setText(""); while ((str = br.readLine()) != null){ taQues.setText(taQues.getText() + str + '/n'); } if (i >= 0) str = ans.substring(i-1,i); corAns.setText(str); } catch (FileNotFoundException e) { i ++; JPanel jp = new JPanel(new GridLayout(2,1)); final JDialog jd = new JDialog(this, "Error"); JButton jb = new JButton("確定"); jb.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { jd.setVisible(false); } }); JLabel jl = new JLabel("已到第一題！"); jp.add(jl); jp.add(jb); jd.getContentPane().add(jp); jd.setLocation(400, 400); jd.pack(); jd.setVisible(true); } catch (IOException e) { e.printStackTrace(); } } private void getNextQuestion() { String str; try { fr = new FileReader(qPath + ( ++i ) + ".txt"); br = new BufferedReader(fr); taQues.setText(""); while ((str = br.readLine()) != null){ taQues.setText(taQues.getText() + str + '/n'); } str = ans.substring(i-1,i); corAns.setText(str); } catch (FileNotFoundException e) { i --; JPanel jp = new JPanel(new GridLayout(2,1)); final JDialog jd = new JDialog(this, "Error"); JButton jb = new JButton("確定"); jb.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { jd.setVisible(false); } }); JLabel jl = new JLabel("已到最後一題！"); jp.add(jl); jp.add(jb); jd.getContentPane().add(jp); jd.setLocation(400, 400); jd.pack(); jd.setVisible(true); } catch (IOException e) { e.printStackTrace(); } } } 

 

 

Client端：

package qAnswer; import javax.swing.*; import java.net.*; import java.awt.*; import java.awt.event.*; import java.io.*; public class Client extends JFrame { JFrame jfConn = new JFrame(); JPanel jps = new JPanel(new GridLayout(2,1)), jpg = new JPanel(new GridLayout(1,4)), jpb = new JPanel(new FlowLayout(FlowLayout.CENTER,5,5)); JButton jba = new JButton("A"), jbb = new JButton("B"), jbc = new JButton("C"), jbd = new JButton("D"), jbConn = new JButton("連接"), jbDis = new JButton("發送答案"), jbReset = new JButton("重置"); JButton[] select = {jba,jbb,jbc,jbd}; JTextField tfip = new JTextField("請在此輸入服務器的IP地址"), tfName= new JTextField("請在此輸入參賽選手名稱"); JLabel jlAns1 = new JLabel("您選擇的答案是："), jlAns2 = new JLabel(), jlConn1 = new JLabel("與服務器連接情況："), jlConn2 = new JLabel(); JTextArea taQues = new JTextArea(); Socket s = null; private DataInputStream dis = null; private DataOutputStream dos = null; boolean succ = true; public Client(){ super("客戶端"); } public static void main(String[] args) { new Client().launchFrame(); } private void launchFrame() { jfConn.add(tfip); jfConn.add(jbConn,BorderLayout.SOUTH); jfConn.add(tfName,BorderLayout.NORTH); jbConn.addActionListener(new ConnMonitor()); jfConn.pack(); jfConn.setLocation(400, 400); jfConn.setVisible(true); for(int i = 0; i<4; i++){ jpg.add(select[i]); select[i].addActionListener(new SelectMonitor()); } jpb.add(jlConn1); jpb.add(jlConn2); jpb.add(jlAns1); jpb.add(jlAns2); jpb.add(jbDis); jbDis.addActionListener(new DisAnsMonitor()); jpb.add(jbReset); jbReset.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { jlAns2.setText(""); } }); jps.add(jpg); jps.add(jpb); this.setBounds(200, 100, 500, 300); this.add(taQues); this.add(jps,BorderLayout.SOUTH); this.addWindowListener(new WindowAdapter(){ public void windowClosing(WindowEvent e) { try { succ = false; dos.writeUTF("quit"); if(dis != null) dis.close(); if(dos != null) dos.close(); if(s != null) s.close(); } catch (IOException e1) { e1.printStackTrace(); } System.exit(0); } }); } private class ReceTh implements Runnable{ public void run(){ try { while (succ) { taQues.setText(dis.readUTF()); } } catch (SocketException e){ jlConn2.setText("失去連接！"); } catch (EOFException e){ jlConn2.setText("失去連接！"); } catch (IOException e) { e.printStackTrace(); } } } private class DisAnsMonitor implements ActionListener{ public void actionPerformed(ActionEvent e) { try { dos.writeUTF(jlAns2.getText()); jlAns2.setText(""); } catch (SocketException e2){ jlConn2.setText("失去連接！"); } catch (IOException e1) { e1.printStackTrace(); } } } private class SelectMonitor implements ActionListener{ public void actionPerformed(ActionEvent e) { char ch = e.getActionCommand().charAt(0); switch(ch){ case 'A' : jlAns2.setText(jlAns2.getText() + "A"); break; case 'B' : jlAns2.setText(jlAns2.getText() + "B"); break; case 'C' : jlAns2.setText(jlAns2.getText() + "C"); break; case 'D' : jlAns2.setText(jlAns2.getText() + "D"); break; } } } private class ConnMonitor implements ActionListener{ public void actionPerformed(ActionEvent e) { try { s = new Socket(tfip.getText().trim(), 6666); dis = new DataInputStream(s.getInputStream()); dos = new DataOutputStream(s.getOutputStream()); dos.writeUTF(tfName.getText()); jlConn2.setText("正常"); setVisible(true); jfConn.setVisible(false); new Thread(new ReceTh()).start(); } catch (UnknownHostException e1) { tfip.setText("連接失敗！"); } catch (IOException e1) { tfip.setText("連接失敗！"); } } } }