Java 图书管理系统：源代码和分步指南300

在本文中，我们将提供一个完整的 Java 图书管理系统 (LMS) 源代码，并提供分步指南，帮助您构建自己的数字图书管理系统。

源代码```java
import .*;
public class LibraryManagementSystem {
private Map books;
private List members;
public LibraryManagementSystem() {
books = new HashMap();
members = new ArrayList();
}
public void addBook(Book book) {
((), book);
}
public void addMember(Member member) {
(member);
}
public void issueBook(String bookId, String memberId) {
Book book = (bookId);
Member member = getMemberById(memberId);
if (book != null && member != null) {
(member);
}
}
public void returnBook(String bookId) {
Book book = (bookId);
if (book != null) {
(null);
}
}
public Member getMemberById(String memberId) {
for (Member member : members) {
if (().equals(memberId)) {
return member;
}
}
return null;
}
public Book getBookById(String bookId) {
return (bookId);
}
}
class Book {
private String id;
private String title;
private String author;
private Member issuedTo;
public Book(String id, String title, String author) {
= id;
= title;
= author;
}
public String getId() {
return id;
}
public void setId(String id) {
= id;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
= title;
}
public String getAuthor() {
return author;
}
public void setAuthor(String author) {
= author;
}
public Member getIssuedTo() {
return issuedTo;
}
public void setIssuedTo(Member issuedTo) {
= issuedTo;
}
}
class Member {
private String id;
private String name;
public Member(String id, String name) {
= id;
= name;
}
public String getId() {
return id;
}
public void setId(String id) {
= id;
}
public String getName() {
return name;
}
public void setName(String name) {
= name;
}
}
```