问Spring在本地没有看到数据源，但是部署在Horaku上很好。

EN

    @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);
        }
    }

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";