My-SQL JDBC 커넥션 유틸 클래스 기본코드

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

public class DBUtil {
	static String URL = "jdbc:mysql://localhost:3306/testdb?serverTimezone=UTC";
	static String USER = "root";
	static String PASSWORD = "1234";
	static String DRIVER_NAME = "com.mysql.cj.jdbc.Driver"; //My-SQL 8.0버전용 라이브러리
	//접속
	public static Connection getConnection() throws Exception{
		Connection conn = null;
		Class.forName(DRIVER_NAME);
		conn = DriverManager.getConnection(URL, USER, PASSWORD);
		return conn;
	}

	//접속 종료 
	public static void close(Connection conn) {
		if (conn != null) {
			try {
				conn.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}
	}
	public static void close(Connection conn,PreparedStatement ps) {
		if (ps != null) {
			try {
				ps.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}
		close(conn);
	}
	public static void close(Connection conn, PreparedStatement ps, ResultSet rs) {
		if (rs != null) {
			try {
				rs.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}
		close(conn,ps);
	}
	public static void main(String[] args) throws Exception {
		System.out.println(getConnection());
	}
}