Confident in/ confident of/ confident about/ confident with

e confident in 对某人有信心
例如：I am confident in myself.我对自己有信心!
I am confident in you.我对你有信心!
be confident of 对做什么事情有信心/确信干什么事
He is confident of getting the first place.他对拿第一有信心/他确信拿第一
He is confident of getting his report finished by the end of this month.
confident about 对于一件事有信心
I am confident about the future of our company
I am confident about the prospect of my career
be confident with 对做什么事情有信心,对一群个体有信心
I am confident with my students.
I am confident with my staffs / employees.