增加用户绑定所借的书的功能
首先将用户借的书作为用户的一个属性进行新增
private String name;
private String password;
private Books books;
这样方便以后的赋值
将注册的每一个账号进行对象的新建，并对以下各个方法进行传参
public static void UsersLogin(ArrayList<Users> UsersDatas)
{Users user = new Users();while (true) {int flag=1;System.out.println("请输入用户的用户名");Scanner scanner = new Scanner(System.in);String Usersname = scanner.nextLine();System.out.println("请输入用户的密码");String password = scanner.nextLine();for (int i = 0; i < UsersDatas.size(); i++) {if (Usersname.equals(UsersDatas.get(i).getName()) && password.equals(UsersDatas.get(i).getPassword())) {System.out.println("恭喜您！登录成功");flag=0;user=UsersDatas.get(i);UserChoice(user);break;}}if (flag==1) {System.out.println("不好意思账号或密码错误，请在输入一次");}}
}
将对象与账号密码进行绑定
public static void BorrowBook(ArrayList<Books> libraries,ArrayList<Books> Usersbooks, Users user )
{System.out.println("请输入你要所要借书的id");Scanner scanner = new Scanner(System.in);String Bookid = scanner.nextLine();for (int i = 0; i < libraries.size() ; i++) {if (libraries.get(i).getId().equals(Bookid)) {Usersbooks.add(libraries.get(i));user.setBooks(libraries.get(i));libraries.remove(i);}}System.out.println("恭喜你，借书完毕，即将返回主页面");UserChoice(user);
}
public static void Returnbook(ArrayList<Books> libraries,ArrayList<Books> Usersbooks, Users user )
{System.out.println("请输入你要所要还书的id");Scanner scanner = new Scanner(System.in);String id = scanner.nextLine();for (int i = 0; i < Usersbooks.size() ; i++) {if (Usersbooks.get(i).getId().equals(id)) {libraries.add(Usersbooks.get(i));user.setBooks(null);Usersbooks.remove(i);}}System.out.println("恭喜你，还书完毕，即将返回主页面");UserChoice(user);
}
借书还书绑定为对对象属性得操作
让管理员知道哪一个用户借了哪一本书
最后增加管理员查看用户数据的功能
public static void BossSeeAllUsersdate(ArrayList<Users> UsersDatas)
{for (int i = 0; i< UsersDatas.size() ; i++) {System.out.println(UsersDatas.get(i).getName());if(UsersDatas.get(i).getBooks()!=null){System.out.println("该用户借了"+UsersDatas.get(i).getBooks().getName());}}BossChoice();
