我正在做 Heroku 教程https://devcenter.heroku.com/articles/getting-started-with-gradle-on-heroku一切都很好，直到我無法在本地實例中運行數(shù)據(jù)庫。我在 intelij 中并通過控制臺嘗試了它（$heroku local web after build gradlew）。我嘗試將數(shù)據(jù)庫從 Heroku 復(fù)制到本地 postgresDb 但也失敗了。    @Value("${spring.datasource.url}")    private String dbUrl;    @Autowired    private DataSource dataSource;    @RequestMapping("/db")    String db(Map<String, Object> model) {        try (Connection connection = dataSource.getConnection()) {            Statement stmt = connection.createStatement();            stmt.executeUpdate("CREATE TABLE IF NOT EXISTS ticks (tick timestamp)");            stmt.executeUpdate("INSERT INTO ticks VALUES (now())");            ResultSet rs = stmt.executeQuery("SELECT tick FROM ticks");            ArrayList<String> output = new ArrayList<String>();            while (rs.next()) {                output.add("Read from DB: " + rs.getTimestamp("tick"));            }            model.put("records", output);            return "db";        } catch (Exception e) {            model.put("message", e.getMessage());            return "error";        }    }    @Bean    public DataSource dataSource() throws SQLException, URISyntaxException {        if (dbUrl == null || dbUrl.isEmpty()) {            return new HikariDataSource();        } else {            HikariConfig config = new HikariConfig();            config.setJdbcUrl(dbUrl);            return new HikariDataSource(config);        }    }我也嘗試dbUrl從 Heroku 配置接收URI dbUri = new URI(System.getenv("DATABASE_URL"));            String username = dbUri.getUserInfo().split(":")[0];            String password = dbUri.getUserInfo().split(":")[1];            String dbUrl = "jdbc:postgresql://" + dbUri.getHost() + ':' + dbUri.getPort() + dbUri.getPath() + "?sslmode=require";在我轉(zhuǎn)到 /db 頁面后，我收到HikariPool-1 - dataSource or dataSourceClassName or jdbcUrl is required. 我做錯了什么？