在示例代码中，用方法引用替代语句Comparator&#91;User&#93; comparator = Comparator.comparing(u -> u.getUserName())正确的是（）。 A: Comparator<User> comparator = Comparator.comparing(uses::getUserName) B: Comparator<User> comparator = Comparator.comparing(User::getUserName) C: Comparator< > comparator = Comparator.comparing(uses::getUserName) D: Comparator< > comparator = Comparator.comparing(User::getUserName)

JSP EL 表达式：${user.userName}执行效果等同于（ ） A: %=user.getUserName()% B: %user.getUserName();% C: D: % user.userName;%

将字段User改为user需要编写| rename User user

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});

request.setAttribute("user","svse");session.setAttribute("user","bob");使用{user}则显示( )

hive中清空表user的HQL语句为（ ） A: delete from user; B: remove table user; C: drop table user; D: truncate table user;

删除用户账户命令是( ) A: DROP USER B: DROP TABLE USER C: DELETE USER D: DELETE FROM USER

要删除用户user，同时也删除其家目录，则应使用指令 A: userdel user B: userdel -r user C: deluser -r user D: deluser user

创建一个名为user的Session的正确方法是() A: Session[user]=值; B: Session("user")=值 C: Session(user)=值 D: Session["user"]=值

在 MySQL 中,删除用户的命令是( ) A: DROP USER B: REVOKE USER C: DELETE USER D: REMOVE USER