示例代碼片段：

            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));
            }
 

類型清單如下：

• -7 BIT
• -6 TINYINT
• -5 BIGINT
• -4 LONGVARBINARY
• -3 VARBINARY
• -2 BINARY
• -1 LONGVARCHAR
• 0 NULL
• 1 CHAR
• 2 NUMERIC
• 3 DECIMAL
• 4 INTEGER
• 5 SMALLINT
• 6 FLOAT
• 7 REAL
• 8 DOUBLE
• 12 VARCHAR
• 91 DATE
• 92 TIME
• 93 TIMESTAMP
• 1111 OTHER

參考鏈接：https://alvinalexander.com/java/edu/pj/jdbc/recipes/ResultSet-ColumnType.shtml

Java如何獲取ResultSet結果中的每一列的數據類型