Java 데이터베이스 연결에 대한 모범 사례는 무엇입니까?

import javax.sql.DataSource;
import com.zaxxer.hikari.HikariConfig;
import com.zaxxer.hikari.HikariDataSource;

public class ConnectionPoolExample {

    public static DataSource createConnectionPool() {
        HikariConfig config = new HikariConfig();
        config.setJdbcUrl("jdbc:mysql://localhost:3306/mydb");
        config.setUsername("root");
        config.setPassword("password");
        config.setMaximumPoolSize(10);
        return new HikariDataSource(config);
    }

    public static void main(String[] args) {
        // Get the data source
        DataSource dataSource = createConnectionPool();

        // Get a connection from the pool
        Connection connection = dataSource.getConnection();

        // Use the connection
        // ...

        // Close the connection
        connection.close();
    }
}

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

public class PreparedStatementExample {

    public static void main(String[] args) throws SQLException {
        // Get a connection
        Connection connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/mydb", "root", "password");

        // Create a prepared statement
        String sql = "SELECT * FROM users WHERE name = ?";
        PreparedStatement statement = connection.prepareStatement(sql);

        // Set the parameter
        statement.setString(1, "John Doe");

        // Execute the query
        ResultSet results = statement.executeQuery();

        // Close the statement
        statement.close();
    }
}

@SpringBootApplication
public class JpaApplication {

    public static void main(String[] args) {
        SpringApplication.run(JpaApplication.class, args);
    }

    @Bean
    public DataSource dataSource() {
        HikariConfig config = new HikariConfig();
        config.setJdbcUrl("jdbc:mysql://localhost:3306/mydb");
        config.setUsername("root");
        config.setPassword("password");
        config.setMaximumPoolSize(10);
        return new HikariDataSource(config);
    }
}

@Entity
public class User {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    private String name;

    // Getters and setters
}

@Autowired
private UserRepository userRepository;

public void saveUser(String name) {
    User user = new User();
    user.setName(name);
    userRepository.save(user);
}

public List<User> findByName(String name) {
    return userRepository.findByName(name);
}