JDBC中具有单个语句的多个结果集

Question

Connection.createStatement() has no parameters. Then we call Statement.executeQuery() to retrieve data.

Can we use single Statement instance for multiple different queries run?

Answer 1

Yes, but not concurrently. When you re-execute the statement, the previous result set is closed :

A ResultSet object is automatically closed when the Statement object that generated it is closed, re-executed, or used to retrieve the next result from a sequence of multiple results.

Answer 2

如果要执行，则可以使用不同参数的相同SQL。

Answer 3

尝试声明createStatement（int resultSetType，int resultSetConcurrency，int resultSetHoldability）resultSetHoldability = ResultSet.HOLD_CURSORS_OVER_COMMIT