android注册登录mysql

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

public class DatabaseHelper {
    private static final String URL = "jdbc:mysql://your_mysql_server:3306/your_database";
    private static final String USER = "your_username";
    private static final String PASSWORD = "your_password";

    public static Connection getConnection() throws SQLException {
        return DriverManager.getConnection(URL, USER, PASSWORD);
    }
}

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;

public class UserDAO {
    public void registerUser(String username, String password) throws SQLException {
        String sql = "INSERT INTO users (username, password) VALUES (?, ?)";
        try (Connection conn = DatabaseHelper.getConnection();
             PreparedStatement pstmt = conn.prepareStatement(sql)) {
            pstmt.setString(1, username);
            pstmt.setString(2, password);
            pstmt.executeUpdate();
        }
    }
}

import org.mindrot.jbcrypt.BCrypt;

public class PasswordUtils {
    public static String hashPassword(String password) {
        return BCrypt.hashpw(password, BCrypt.gensalt());
    }

    public static boolean checkPassword(String password, String hashedPassword) {
        return BCrypt.checkpw(password, hashedPassword);
    }
}