An issue with the association relationship configuration of hibernate

Of course, there are three to write, and one user can borrow, reserve, and handle three different borrows at the same time. How can you save three pieces of information without three!

class user {

private int userid;

private string username;

private string userpwd;

private string useremail;

private string userrole;User roles.

private string userright;User borrowing permissions.

private float userdebt;The user is currently in arrears.

private int usergetnum;The total number of times a user borrowed a book.

private borrow borrow;Borrow borrow

private borrow borrowoforder;Make an appointment for borrow

private borrow borrowofadmin;Handle borrow

A user, for a book, is a borrow, and it is impossible to be both booked and borrowed.

Why is Hibernate associated? It doesn't correlate with how you use hibernate to operate the database, how to objectify the database table, and it needs these mappings internally, otherwise you can't use hibernate.

Several mapping relationships "Lingshuang Plum Blossom" have already been said.

Hibernate is a framework for manipulating databases, and when you query data or something, all you look up are entities! These entities and the columns of the database are linked together by hibernate

To facilitate operations between entities.

This makes it easier to manipulate the database.

First, the program can operate hibernate through spring, because when you receive the data source in the spring configuration file, it is obtained by controlling hibernate through spring, and the hibernate configuration file can be changed, you can put it in **Yes, under the directory of src, or under webroot, as long as you write the path correctly, your path must have been written, To find out where your profile is, you can select your project and click on the menu bar.

This button, you can view the location of your project deployment, and you can also see the location where your configuration file is located, the file name of config, which is generally created under the classpath, so you don't need to write it, that is, you put it in this directory.

Second, the data source can be placed in the hibernate configuration file or in the spring configuration file, which is possible! It's up to you to get used to it! Hope it can help you, thank you!

You try to write this sentence classpath, write it as a relative path, and change it to something like this: