如何用java开发一个藏书系统，有添加作者、书名、价格、出版社、出版年份，方法有添加藏书、根据作者查找图书、根据书名查找图书、计算藏书总数、计算藏书总金额

您好！关于您的问题，我可以回答。首先，您可以创建一个“Book”类，该类应该具有“作者”、“书名”、“价格”、“出版社”和“出版年份”这些属性。然后，您可以创建一个“Library”类，它将管理所有的“Book”对象。该类可以包括以下方法：添加藏书、根据作者查找图书、根据书名查找图书、计算藏书总数和计算藏书总金额。

在添加藏书的方法中，您可以创建一个新的“Book”对象，并将其添加到“Library”对象中。在查找图书的方法中，您可以遍历“Library”对象中所有的“Book”对象，并返回符合要求的书籍。在计算藏书总数和总金额的方法中，您可以遍历“Library”对象中所有的“Book”对象，并计算总数和总金额。

这里提供一个简单的基于Java的“Library”类的代码示例：

public class Book {
  private String author;
  private String title;
  private double price;
  private String publisher;
  private int year;

  public Book(String author, String title, double price, String publisher, int year) {
    this.author = author;
    this.title = title;
    this.price = price;
    this.publisher = publisher;
    this.year = year;
  }

  // getters and setters omitted for brevity
}

import java.util.ArrayList;
import java.util.List;

public class Library {
  private List<Book> books = new ArrayList<>();

  public void addBook(Book book) {
    books.add(book);
  }

  public List<Book> findBooksByAuthor(String author) {
    List<Book> result = new ArrayList<>();
    for (Book book : books) {
      if (book.getAuthor().equals(author)) {
        result.add(book);
      }
    }
    return result;
  }

  public List<Book> findBooksByTitle(String title) {
    List<Book> result = new ArrayList<>();
    for (Book book : books) {
      if (book.getTitle().equals(title)) {
        result.add(book);
      }
    }
    return result;
  }

  public int getTotalBooks() {
    return books.size();
  }

  public double getTotalAmount() {
    double amount = 0;
    for (Book book : books) {
      amount += book.getPrice();
    }
    return amount;
  }
}

// 使用方法示例
Library library = new Library();
Book book1 = new Book("George Orwell", "1984", 9.99, "Secker and Warburg", 1949);
Book book2 = new Book("George Orwell", "Animal Farm", 6.99, "Secker and Warburg", 1945);
library.addBook(book1);
library.addBook(book2);
System.out.println("Total books: " + library.getTotalBooks()); // 输出：Total books: 2
System.out.println("Total amount: " + library.getTotalAmount()); // 输出：Total amount: 16.98
List<Book> booksByAuthor = library.findBooksByAuthor("George Orwell");
System.out.println("Books by George Orwell: " + booksByAuthor); // 输出：Books by George Orwell: [Book [author=George Orwell, title=1984, price=9.99, publisher=Secker and Warburg, year=1949], Book [author=George Orwell, title=Animal Farm, price=6.99, publisher=Secker and Warburg, year=1945]]

希望本回答能够帮助您！