mysql之間和通過JDBC preparestatement使用的mysql-獲取參數索引超出范圍異常

Question

從選擇查詢中參數化該值（日期值為BETWEEN，AND）

我的查詢

SELECT COUNT(*) AS assignedtotalcount FROM ticket, ticket_data
WHERE ticket.`ticket_id` = ticket_data.`ticket_id`
AND ticket.`created` BETWEEN '?' AND '?'

從上述查詢中參數化了BETWEEN和中的值

Java代碼

static String dateFrom = "2018-01-01";
static String dateTo = "2018-01-31";
String query = reportQuery.toString();
statement = connection.createStatement();
preparedStatement = connection.prepareStatement(query);
preparedStatement.setString(1, dateFrom);
preparedStatement.setString(2, dateTo);
resultSet = preparedStatement.executeQuery(query);

執行時，我得到以下異常

java.sql.SQLException: Parameter index out of range (1 > number of parameters, which is 0).

請幫我解決

Answer 1

不要引用占位符。 您需要更改'?' 到? 。

所以查詢變成這樣

SELECT COUNT(*) AS assignedtotalcount FROM ticket, ticket_data
WHERE ticket.`ticket_id` = ticket_data.`ticket_id`
AND ticket.`created` BETWEEN ? AND ?