Java library management system source code book borrowing and return management

systematically introduced
The main purpose of the library management system is to realize the information management of the library. The main business of the library is the borrowing and return of new books, so the core function of the system is to realize the borrowing and return of books. In addition, it is also necessary to provide functions such as book information inquiry and reader book borrowing status inquiry. After the implementation of the project, the library's book borrowing and return process can be improved and work efficiency can be improved.

operating precautions
(1) The user name of this system is mr, and the password is mrsoft
(2) Depending on the type of readers, the number of books that can be borrowed varies.

operational flow
(1) After users log in to the library management system, they can see the book borrowing ranking list. Through the ranking list, they can see the names of the borrowed books, book types, borrowing times and other relevant information.
(2) Click the "System Settings"/"Library Information" command to set library information.
(3) Click the "System Settings"/"Administrator Settings" command to add, set permissions, query and delete administrator information.
(4) Click the "System Settings"/"Parameter Settings" command to add the certificate fee and validity period information.
(5) Click the "System Settings"/"Bookshelf Settings" command to add, modify and delete bookshelf information.
(6) Click the "Reader Management"/"Reader Type Management" command to add, modify and delete reader type information.
(7) Click the "Reader Management"/"Reader File Management" command to add, modify and delete reader information.
(8) Click the "Book Management"/"Book Type Setting" command to add, modify and delete book type information.
(9) Click the "Book Management"/"Book Archives Management" command to add, modify and delete book information.
(10) Click the "Book Borrowing Return"/"Book Borrowing" command to add an operation to the book borrowing information.
(11) Click the "Book Borrowing Return"/"Book Renewal" command to add book renewal information.
(12) Click the "Book Loan and Return"/"Book Return" command to add the book return information.
(13) Click the "System Query"/"Book Archives Query" command to query the book archives information.
(14) Click the "System Query"/"Book Borrowing Query" command to query the borrowed book information.
(15) Click the "System Query"/"Borrowing Expiration Reminder" command to query the borrowing expiration reminder information.
(16) Click the "Change Password" button to modify the current user password.
(17) Click the "Exit System" button to exit the current operating system.