netexamsystem_server.java~61~

java在线考试例子代码

package testovernet;

import java.io.*;
import java.net.*;

public class NetExamSystem_Server {
    public static void main(String[] args) {

        ServerSocket serverSocket = null;
        ExamAdmin examAdmin = new ExamAdmin();

        try {
            serverSocket = new ServerSocket(9999);
        }
        catch (IOException e) {
            e.printStackTrace();
        }

        while (true) {

            try {
                Socket servSocket = serverSocket.accept();

                InputStream servInput = servSocket.getInputStream();
                OutputStream servOutput = servSocket.getOutputStream();

                DataInputStream dataInput = new DataInputStream(servInput);
                DataOutputStream dataOutput = new DataOutputStream(servOutput);

                ObjectInputStream objInput = new ObjectInputStream(servInput);
                ObjectOutputStream objOutput = new ObjectOutputStream(
                        servOutput);

                Student stuFromClient = (Student) objInput.readObject();

                System.out.println("Student " + stuFromClient.name +
                                   " is connected. "
                                   + "\n" + "Authenticating...");

                //stuFromClient.printStudentInfo();

                boolean isStudent = examAdmin.isStudentInDatabase(stuFromClient.
                        testNum, stuFromClient.name);

                if (isStudent == true) {

                    dataOutput.writeUTF("\nAuthenticated!"+"\nYou are qulified to take a test!\n"
                                        +"Please input what type of question you want"
                                        + " to answer and how many?");
                            /*  dataOutput.writeUTF("You are qulified to take a test!\n"
                                          + "Let's start:"); */

                    dataOutput.writeUTF("Eligible");

                    String questionType = dataInput.readUTF();
                    int questionAmount = dataInput.readInt();

                    examAdmin.sendPaperToStudent(questionType, questionAmount,
                                                 objOutput);

                    examAdmin.getTestPaperAfterExamFromStudent(questionAmount,
                            objInput);

                    examAdmin.caculatorStudentScore(questionAmount, dataOutput);

                    examAdmin.recordStudentScoreToDatabase();

                }
                else {

                    dataOutput.writeUTF(
                            "\nSorry,You are not qulified to take a test!\n"
                            + "Please make yourself qulified, Bye!!!");
                    dataOutput.writeUTF("NotEligible");
                }

                servInput.close();
                servOutput.close();
                servSocket.close();
            }
            catch (Exception e) {
                e.printStackTrace();
            }
        }

    }
}