Apache Derby - 检查数据库已经创建？

CREATE DATABASE<database_name>

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

public class DerbyCheck {
    public static void main(String[] args) {
        String url = "jdbc:derby://localhost:1527/<database_name>";
        String user =<username>";
        String password =<password>";

        try {
            Connection conn = DriverManager.getConnection(url, user, password);
            System.out.println("Database already exists.");
        } catch (SQLException e) {
            System.out.println("Database does not exist.");
        }
    }
}