Java를 사용하여 온라인 시험 시스템의 시험 모니터링 기능을 구현하는 방법

import javax.media.*;
import java.io.IOException;

public class ExamVideoMonitor {
    public static void main(String[] args) {
        try {
            // 获取摄像头设备
            CaptureDeviceInfo deviceInfo = CaptureDeviceManager.getDevice("vfw:0");
            
            // 创建视频播放器
            Player player = Manager.createRealizedPlayer(deviceInfo.getLocator());
            
            // 播放视频
            player.start();
            
            // 暂停5秒
            Thread.sleep(5000);
            
            // 停止视频播放
            player.stop();
            
            // 释放资源
            player.deallocate();
            
        } catch (IOException | NoPlayerException | InterruptedException e) {
            e.printStackTrace();
        }
    }
}

import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.Socket;

public class ExamNetworkMonitor {
    public static void main(String[] args) {
        String hostname = "www.example.com";
        int port = 80;
        
        try {
            // 创建 Socket 实例
            Socket socket = new Socket();
            
            // 设置连接超时时间为3秒
            socket.connect(new InetSocketAddress(hostname, port), 3000);
            
            // 连接成功，说明考生在联网
            System.out.println("考生已联网");
            
            // 关闭 Socket 连接
            socket.close();
            
        } catch (IOException e) {
            // 连接失败，说明考生没有联网
            System.out.println("考生未联网");
            e.printStackTrace();
        }
    }
}

import java.awt.*;
import java.awt.image.BufferedImage;

public class ExamScreenMonitor {
    public static void main(String[] args) {
        try {
            // 创建 Robot 实例
            Robot robot = new Robot();
            
            // 获取屏幕尺寸
            Dimension screenDimension = Toolkit.getDefaultToolkit().getScreenSize();
            int screenWidth = screenDimension.width;
            int screenHeight = screenDimension.height;
            
            // 创建一个全屏大小的 BufferedImage
            BufferedImage screenCapture = robot.createScreenCapture(new Rectangle(screenWidth, screenHeight));
            
            // 保存截图
            ImageIO.write(screenCapture, "jpg", new File("screenCapture.jpg"));
            
        } catch (AWTException | IOException e) {
            e.printStackTrace();
        }
    }
}

import java.lang.management.ManagementFactory;
import java.util.List;

public class ExamProcessMonitor {
    public static void main(String[] args) {
        // 获取运行时MXBean
        RuntimeMXBean runtimeMxBean = ManagementFactory.getRuntimeMXBean();
        
        // 获取 Java 进程的 PID
        String runtimeName = runtimeMxBean.getName();
        String pid = runtimeName.split("@")[0];
        
        // 打印进程名称和 PID
        System.out.println("进程名称：" + runtimeName);
        System.out.println("进程PID：" + pid);
        
        // 获取所有进程的信息
        List<ProcessInfo> processList = ManagementFactory.getPlatformMXBean(ProcessMXBean.class).getProcessList();
        
        // 遍历所有进程信息
        for(ProcessInfo processInfo : processList) {
            System.out.println("进程名称：" + processInfo.getName());
            System.out.println("进程ID：" + processInfo.getPid());
            System.out.println("进程耗时：" + processInfo.getUptime());
        }
    }
}