Hikari无法创建池连接

Question

我需要使用Hikari库实现JDBC Pool Connection，但无法使其正常工作。我的代码如下：

public class DataSource {

    private static HikariConfig config = new HikariConfig();
    private static HikariDataSource ds;
    static {
        config.setJdbcUrl("jdbc:sqlserver://localhost:1433;database=Test;integratedSecurity=true;");
        config.setUsername("****");
        config.setPassword("*********");
        config.addDataSourceProperty("cachePrepStmts", "true");
        config.addDataSourceProperty("prepStmtCacheSize", "250");
        config.addDataSourceProperty("prepStmtCacheSqlLimit", "2048");
        ds = new HikariDataSource(config);
        ds.setMaximumPoolSize(100);
        ds.setMinimumIdle(5);
    }
    private DataSource() {
    }

    public static Connection getConnection() throws SQLException {
        HikariPool hikariPool = new HikariPool(config);
        System.out.println("POOL Active Connections -- " + hikariPool.getActiveConnections() + " Total " + hikariPool.getTotalConnections());
        return ds.getConnection();
    }

}

public class MainSample {
    private static final Logger logger = LoggerFactory.getLogger(MainSample.class);

    public static void loadDriver(String driverClassName) throws ClassNotFoundException {
        Class.forName(driverClassName);
    }

    public static void main(String [] args) throws SQLException, ClassNotFoundException {

        ExecutorService executor = Executors.newSingleThreadExecutor();
        executor.submit(() -> {
            String threadName = Thread.currentThread().getName();
            System.out.println("POOL " + threadName);
            try {
                fechData();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        });

        ExecutorService executor1 = Executors.newSingleThreadExecutor();
        executor1.submit(() -> {
            String threadName = Thread.currentThread().getName();
            System.out.println("POOL " + threadName);
            try {
                fechData();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        });

        ExecutorService executor2 = Executors.newSingleThreadExecutor();
        executor2.submit(() -> {
            String threadName = Thread.currentThread().getName();
            System.out.println("POOL " + threadName);
            try {
                fechData();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        });
}

当我询问活动连接数时。它始终以1个活动连接作为响应。

能否请您给我一些有关如何解决此问题的想法？