Spring 缓存注解 @Cacheable 使用两个或多个参数作为缓存的 key

@Cacheable(key = "#page+'-'+#pageSize")
public List<User> findAllUsers(int page,int pageSize) {
    int pageStart = (page-1)*pageSize;
    return userMapper.findAllUsers(pageStart,pageSize);
}

@Cacheable(key = "'countUsers'")
public int countUsers() {
    return userMapper.countUsers();
}