Java如何获取ResultSet结果中的每一列的数据类型

示例代码片段：

            ResultSet resultSet = statement.executeQuery(sql);
            ResultSetMetaData metaData = resultSet.getMetaData();
            System.out.println(metaData.getColumnCount());
            for (int i = 1 ; i <= metaData.getColumnCount(); i ++) {
                System.out.println(metaData.getColumnType(i));
                System.out.println(metaData.getColumnTypeName(i));
            }            ResultSet resultSet = sta