已知,存在 QueryRunner对象 runner , SQL语句:String sql = "select * from user where id=?";下面操作中,能实现查询指定记录的选项是()
A. User user=(User)runner.query(sql, new BeanListHandler(User.class), new Object[]{id});
B. User user=(User)runner.query(sql, new BeanHandler(User.class));
C. User user=(User)runner.query(sql, new BeanListHandler(User.class), id);
D. User user=(User)runner.query(sql, new BeanHandler(User.class), new Object[]{id});
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下面选项,用于设置dbcp连接池最小闲置连接数目的方法是()
A. setMaxActive (int maxIdle)
B. setMinIdle(int minIdle)
C. setInitialSize(int initialSize)
D. setInitial(int initialSize)
已知SQL语句: select count(*) from customer;则下面Handler中,最适合转换的是()
A. BeanListHandler
B. ArrayHandler
C. BeanMapHandler
D. ScalarHandler
下面选项中,用于设置dbcp连接数据库的驱动名称的方法是()
A. setDriverClass(String driverClassName)
B. setDriverClassString(String driverClassName)
C. setDriver (String driverClassName)
D. setDriverClassName(String driverClassName)
已知,存在 QueryRunner对象 runner ,SQL语句:String sql = "delete from user where id=?";下面操作中,能实现删除记录id=1的操作是()
A. int num =runner.delete(sql, 1);
B. int num =runner.update(sql, 1);
C. Object num =runner.delete(1, sql);
D. Object num =runner.update(1, sql);