code: public static String identifyDriver(DataSource ds) {
  		if(ds instanceof DataSourceWrapper) {
  			final String driver = ((DataSourceWrapper)ds).getDriver();
  			if(StrUtil.isNotBlank(driver)) {
  				return driver;
  			}
  		}
  		
  		Connection conn = null;
  		String driver = null;
  		try {
  			try {
  				conn = ds.getConnection();
  			} catch (SQLException e) {
  				throw new DbRuntimeException("Get Connection error !", e);
  			} catch (NullPointerException e) {
  				throw new DbRuntimeException("Unexpected NullPointException, maybe [jdbcUrl] or [url] is empty!", e);
  			}
  			driver = identifyDriver(conn);
  		} finally {
  			DbUtil.close(conn);
  		}
  
  		return driver;
  	}
docs: 识别JDBC驱动名
  
  @param ds 数据源
  @return 驱动