如何通过Java开发实现物联网硬件的电子门禁功能

import javax.comm.CommPort;
import javax.comm.CommPortIdentifier;
import javax.comm.SerialPort;

public class SerialCommunicationExample {
    public static void main(String[] args) {
        try {
            // 获取串口标识符
            CommPortIdentifier portIdentifier = CommPortIdentifier.getPortIdentifier("COM1");
            
            // 打开串口
            CommPort commPort = portIdentifier.open("SerialCommunicationExample", 2000);
            
            if (commPort instanceof SerialPort) {
                SerialPort serialPort = (SerialPort) commPort;
                
                // 设置通信参数
                serialPort.setSerialPortParams(9600, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);
                
                // 打开输入和输出流
                InputStream inputStream = serialPort.getInputStream();
                OutputStream outputStream = serialPort.getOutputStream();
                
                // 在这里进行读写操作
                
                // 关闭输入和输出流
                inputStream.close();
                outputStream.close();
                
                // 关闭串口
                serialPort.close();
            } else {
                System.out.println("不是串口设备");
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

import java.sql.*;

public class UserAuthenticationExample {
    public static void main(String[] args) {
        String url = "jdbc:mysql://localhost:3306/door_access_control";
        String username = "root";
        String password = "123456";
        
        try {
            // 连接数据库
            Connection connection = DriverManager.getConnection(url, username, password);
            
            // 创建查询
            String query = "SELECT * FROM users WHERE username = ? AND password = ?";
            PreparedStatement preparedStatement = connection.prepareStatement(query);
            preparedStatement.setString(1, "admin");
            preparedStatement.setString(2, "adminpassword");
            
            // 执行查询
            ResultSet resultSet = preparedStatement.executeQuery();
            
            if (resultSet.next()) {
                // 用户认证成功，进行控制操作
            } else {
                // 用户认证失败，拒绝进入
            }
            
            // 关闭连接
            resultSet.close();
            preparedStatement.close();
            connection.close();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class AccessControlLoggerExample {
    private static final Logger logger = LoggerFactory.getLogger(AccessControlLoggerExample.class);
    
    public static void main(String[] args) {
        logger.info("门禁开启");
        logger.info("用户进入门禁区域");
        
        try {
            // 执行门禁控制操作
            
            logger.info("门禁操作成功");
        } catch (Exception e) {
            logger.error("门禁操作失败", e);
            
            // 发送报警信息给管理员
        }
    }
}