更新mysql驅動5.1-47 Generated keys not requested. 錯誤

更新mysql驅動5.1-47後出現錯誤：Generated keys not requested. You need to specify Statement.RETURN_GENERATED_KEY

java.sql.SQLException: Generated keys not requested. You need to specify Statement.RETURN_GENERATED_KEYS to Statement.executeUpdate(), Statement.executeLargeUpdate() or Connection.prepareStatement().

通過檢查發現從5.1.7版本以後的mysql-connector增長了返回GeneratedKeys的條件，若是須要返回GeneratedKeys，則PreparedStatement須要顯式添加一個參數Statement.RETURN_GENERATED_KEYS，以下：

connection = JDBCUtil.getConnection();
preparedStatement = connection.prepareStatement(sql.toString(),Statement.RETURN_GENERATED_KEYS);