package dao; public class Book { private int id; private String title; private String author; private boolean issued; private String borrower; public Book(int id, String title, String author, boolean issued, String borrower) { this.id = id; this.title = title; this.author = author; this.issued = issued; this.borrower = borrower; } public int getId() { return id; } public String getTitle() { return title; } // Getters and setters for other properties public String getAuthor() { return author; } public boolean isIssued() { return issued; } public String getBorrower() { return borrower; } public void setId(int id) { this.id = id; } public void setTitle(String title) { this.title = title; } // Setters for other properties public void setAuthor(String author) { this.author = author; } public void setIssued(boolean issued) { this.issued = issued; } public void setBorrower(String borrower) { this.borrower = borrower; } }

这是一个 Java 类的代码，名为 Book，它有五个属性：id、title、author、issued 和 borrower。其中 id 是 int 类型，title、author 和 borrower 是 String 类型，issued 是 boolean 类型。这个类有一个构造方法，可以传入 id、title、author、issued 和 borrower，然后将这些参数赋值给对象的属性。还有一些 getter 和 setter 方法，可以获取和设置对象的属性。这个类可能是用来表示图书的，因为它有 id、title、author 和 borrower 这几个属性，可以记录一本书的基本信息和借阅情况。