A jury in March found Hayne guilty of two counts of aggravated sexual assault which the victim said left her feeling "dirty, scared and ashamed".
Hayne must serve a minimum of three years and eight months.
In handing down her sentence, District Court Judge Helen Syme said she found that Hayne was fully aware that the victim was not consenting and went ahead anyway.
"The reliability and honesty of the victim's evidence was tested at length and in my view, her reliability was not in doubt. She said no several times," Judge Syme said.