Link Configuration of hibernate

I now have a borrowing information class, such as the following class Borrow {private String borrowId; // borrowing flow private Book book; private User borrowUser; // borrower private Date borrowDate; // borrow Date private Date shouldReturnDate; // The expiration Date private User orderUser; // The reservation person private int renewNum; // the number of times that the account has been renewed private User admin; // The processing business personnel have three property fields for the User, which are the borrower, the reservation person, and the information of the handling person (which should be 1-to-1) below are my User class User {private int userId; private String userName; private String userPwd; Private String userEmail; private String userRole; // user role private String userRight; // the user's permission to borrow books: private float userDebt; // the user's current debt is private int userGetNum; // The total number of books borrowed by the user is private Borrow borrow; (confused !!! Do you want me to write three, so it will certainly be repeated?) Please kindly advise the 1-1 Association Configuration between the two, and store the Foreign keys of the three users in the Borrow table