Project.The_SEED/DB/DBConnect.java

package org.poopki.duckdns.user_db.DB;

import java.sql.*;


public class DBConnect {
    private static final String DB_DRIVER_CLASS = "org.mariadb.jdbc.Driver";
    private static final String DB_URL = "jdbc:mariadb://poopki.duckdns.org:3307/";
    private static final String DB_USERNAME = "mc_dev";
    private static final String DB_PASSWORD = "!Rkdalsrn1027";

    public static Connection connectDB(){
        Connection conn = null;
        Statement stmt = null;
        try {
            Class.forName("org.mariadb.jdbc.Driver");

            conn = DriverManager.getConnection(DB_URL, DB_USERNAME, DB_PASSWORD);
            System.out.println("Connection success");
            stmt = conn.createStatement();
            StringBuilder sb = new StringBuilder();
            String sql = sb.append("create table if not exists student(")
                    .append("id int,")
                    .append("name varchar(20),")
                    .append("grade int")
                    .append(");").toString();
            stmt.execute(sql);
        }
        catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
        catch (SQLException e) {
            // TODO Auto-generated catch block
            System.err.println("에러 내용 :" + e.getMessage());
            System.out.println("DB Connection fail");
        }
        return conn;
    }

}