• 【Java】不一样的图书管理系统

    目录

     src/Main.java

    src/book/Book.java

    src/book/BookList.java

    src/operation/AddOperation.java

    src/operation/BorrowOperation.java

    src/operation/DelOperation.java

    src/operation/DisplayOperation.java

    src/operation/ExitOperation.java

    src/operation/FindBook.java

    src/operation/FindOperation.java

    src/operation/IOperation.java

    src/operation/ReturnOperation.java

    src/user/AdminUser.java

    src/user/NormalUser.java

    src/user/User.java

    src/Main.java

     src/Main.java

    1. import book.BookList;
    2. import user.AdminUser;
    3. import user.NormalUser;
    4. import user.User;
    5.  
    6. import java.util.Scanner;
    7.  
    8. public class Main{
    9.     public static User Login(){
    10.         System.out.println("请输入你的姓名:");
    11.         Scanner scanner = new Scanner(System.in);
    12.         String name = scanner.nextLine();
    13.         System.out.println("请输入你的身份:1-》管理员、2-》普通用户");
    14.         int choice = scanner.nextInt();
    15.         if(choice == 1){
    16.             return new AdminUser(name);
    17.         }
    18.         else{
    19.             return new NormalUser(name);
    20.         }
    21.     }
    22.     public static void main(String[] args){
    23.         //初始化书架
    24.         BookList bookList = new BookList();
    25.         User user = Login();//动态绑定
    26.         while(true) {
    27.             int choice = user.menu();
    28.             user.doOperation(choice, bookList);
    29.         }
    30.  
    31.     }
    32. }

    src/book/Book.java

    1. import book.BookList;
    2. import user.AdminUser;
    3. import user.NormalUser;
    4. import user.User;
    5.  
    6. import java.util.Scanner;
    7.  
    8. public class Main{
    9.     public static User Login(){
    10.         System.out.println("请输入你的姓名:");
    11.         Scanner scanner = new Scanner(System.in);
    12.         String name = scanner.nextLine();
    13.         System.out.println("请输入你的身份:1-》管理员、2-》普通用户");
    14.         int choice = scanner.nextInt();
    15.         if(choice == 1){
    16.             return new AdminUser(name);
    17.         }
    18.         else{
    19.             return new NormalUser(name);
    20.         }
    21.     }
    22.     public static void main(String[] args){
    23.         //初始化书架
    24.         BookList bookList = new BookList();
    25.         User user = Login();//动态绑定
    26.         while(true) {
    27.             int choice = user.menu();
    28.             user.doOperation(choice, bookList);
    29.         }
    30.  
    31.     }
    32. }

    src/book/BookList.java

    1. package book;
    2.  
    3. public class BookList {
    4.     private Book[] books = new Book[10];
    5.  
    6.     private int usedSize;//记录当前有多少本书
    7.  
    8.     public BookList(){
    9.         books[0] = new Book("三国演义","罗贯中",19,"小说" );
    10.         books[1] = new Book("西游记","吴承恩",15,"小说" );
    11.         books[2] = new Book("红楼梦","曹雪芹",25,"小说" );
    12.         usedSize = 3;
    13.     }
    14.  
    15.     /**
    16.      * 得到书
    17.      * @param pos 此时pos位置一定要合法
    18.      * @return 这是一本书
    19.      */
    20.     public Book getBook(int pos){
    21.         return books[pos];
    22.     }
    23.  
    24.     /**
    25.      * 放入图书
    26.      * @param pos pos位置一定要合法
    27.      * @param book 要放入的书
    28.      */
    29.     public void setBook(int pos,Book book){
    30.         books[pos] = book;
    31.     }
    32.  
    33.     /**
    34.      * 实时获取当前书的个数
    35.      * @return
    36.      */
    37.     public int getUsedSize(){
    38.         return usedSize;
    39.     }
    40.  
    41.     /**
    42.      * 实时修改当前书架书的个数
    43.      * @param size
    44.      */
    45.     public void setUsedSize(int size){
    46.         usedSize = size;
    47.     }
    48.  
    49. }

    src/operation/AddOperation.java

    1. package operation;
    2. import book.BookList;
    3. import java.util.Scanner;
    4. import book.Book;
    5. public class AddOperation implements IOperation{
    6.     @Override
    7.     public void word(BookList bookList){
    8.         System.out.println("新增图书!");
    9.         Scanner scanner = new Scanner(System.in);
    10.         System.out.println("请输入书名:");
    11.         String name = scanner.nextLine();
    12.         System.out.println("请输入作者:");
    13.         String author = scanner.nextLine();
    14.         System.out.println("请输入类型:");
    15.         String type = scanner.nextLine();
    16.         System.out.println("请输入价格:");
    17.         int price = scanner.nextInt();
    18.         Book book = new Book(name, author, price, type);
    19.         bookList.setBook(bookList.getUsedSize(),book);
    20.         bookList.setUsedSize(bookList.getUsedSize()+1);
    21.         System.out.println("新增图书成功!");
    22.     }
    23. }

    src/operation/BorrowOperation.java

    1. package operation;
    2. import book.BookList;
    3. import java.util.Scanner;
    4.  
    5. public class BorrowOperation extends FindBook implements IOperation{
    6.     @Override
    7.     public void word(BookList bookList){
    8.         System.out.println("借阅图书!");
    9.         System.out.println("请输入你要借阅的图书名:");
    10.         Scanner scanner = new Scanner(System.in);
    11.         String name = scanner.nextLine();
    12.         int ret = findBook(bookList, name);
    13.         if(ret != -1){
    14.             bookList.getBook(ret).setBorrowed(true);
    15.             System.out.println("借阅成功!");
    16.         }
    17.         else{
    18.             System.out.println("找不到此书!");
    19.         }
    20.     }
    21. }

    src/operation/DelOperation.java

    1. package operation;
    2. import book.BookList;
    3. import java.util.Scanner;
    4. public class DelOperation extends FindBook implements IOperation{
    5.     @Override
    6.     public void word(BookList bookList){
    7.         System.out.println("删除图书!");
    8.         System.out.println("请输入你要删除的图书:");
    9.         Scanner scanner = new Scanner(System.in);
    10.         String name = scanner.nextLine();
    11.         int ret = findBook(bookList, name);
    12.         if(ret != -1){
    13.             for(; ret < bookList.getUsedSize() - 1; ret++){
    14.                 bookList.setBook(ret,bookList.getBook(ret + 1));
    15.             }
    16.             bookList.setBook(ret,null);
    17.             bookList.setUsedSize(bookList.getUsedSize() - 1);
    18.  
    19.             System.out.println("删除成功!");
    20.         }
    21.         else{
    22.             System.out.println("未找到图书!");
    23.         }
    24.     }
    25.  
    26. }

    src/operation/DisplayOperation.java

    1. package operation;
    2.  
    3. import book.BookList;
    4.  
    5. public class DisplayOperation implements IOperation{
    6.     @Override
    7.     public void word(BookList bookList) {
    8.         System.out.println("显示图书!");
    9.         for(int i = 0; i < bookList.getUsedSize(); i++){
    10.             System.out.println(bookList.getBook(i));
    11.         }
    12.     }
    13. }

    src/operation/ExitOperation.java

    1. package operation;
    2.  
    3. import book.BookList;
    4.  
    5. public class ExitOperation implements IOperation{
    6.  
    7.     @Override
    8.     public void word(BookList bookList) {
    9.         System.out.println("退出系统!");
    10.         System.exit(0);
    11.     }
    12. }

    src/operation/FindBook.java

    1. package operation;
    2.  
    3. import book.BookList;
    4.  
    5. public class FindBook {
    6.     public int findBook(BookList bookList, String name){
    7.         int i = 0;
    8.         for(i = 0; i < bookList.getUsedSize(); i++){
    9.             if(name.equals(bookList.getBook(i).getName())){
    10.                 return i;
    11.             }
    12.         }
    13.         return -1;
    14.     }
    15. }

    src/operation/FindOperation.java

    1. package operation;
    2. import java.util.Scanner;
    3. import book.BookList;
    4. import book.Book;
    5.  
    6.  
    7. public class FindOperation extends FindBook implements IOperation{
    8.     @Override
    9.     public void word(BookList bookList){
    10.         System.out.println("查找图书!");
    11.         System.out.println("请输入你要查找的图书:");
    12.         Scanner scanner = new Scanner(System.in);
    13.         String name = scanner.nextLine();
    14.         int ret = findBook(bookList, name);
    15.         if(ret != -1){
    16.             System.out.println(bookList.getBook(ret));
    17.         }
    18.         else{
    19.             System.out.println("未找到此书!");
    20.         }
    21.  
    22.     }
    23. }
    24. /*name.equals(bookList.getBook(i))*/
    25. /*
    26. int size = bookList.getUsedSize();
    27.         for(int i = 0; i < size; i++){
    28.         if(name.equals(bookList.getBook(i).getName())){
    29.         System.out.println("找到了这本书!");
    30.         System.out.println(bookList.getBook(i));
    31.         return;
    32.         }
    33.         }
    34.         System.out.println("没找到这本书!");*/

    src/operation/IOperation.java

    1. package operation;
    2.  
    3. import book.BookList;
    4.  
    5. /**
    6.  * 操作接口
    7.  */
    8. public interface IOperation {
    9.     void word(BookList bookList);
    10. }

    src/operation/ReturnOperation.java

    1. package operation;
    2. import book.BookList;
    3. import java.util.Scanner;
    4. public class ReturnOperation extends FindBook implements IOperation{
    5.     @Override
    6.     public void word(BookList bookList){
    7.         System.out.println("归还图书!");
    8.         System.out.println("请输入你归还的图书!");
    9.         Scanner scanner = new Scanner(System.in);
    10.         String name = scanner.nextLine();
    11.         int ret = findBook(bookList, name);
    12.         if(ret != -1){
    13.             bookList.getBook(ret).setBorrowed(false);
    14.             System.out.println("归还成功!");
    15.         }
    16.         else{
    17.             System.out.println("没有找到此书!");
    18.         }
    19.     }
    20. }

    src/user/AdminUser.java

    1. package user;
    2. import operation.*;
    3.  
    4. import java.util.Scanner;
    5. public class AdminUser extends User{
    6.     public AdminUser(String name){
    7.         super(name);
    8.         this.iOperation = new IOperation[]{
    9.                 new ExitOperation(),
    10.                 new FindOperation(),
    11.                 new AddOperation(),
    12.                 new DelOperation(),
    13.                 new DisplayOperation()
    14.         };
    15.     }
    16.     public int menu(){
    17.         System.out.println("hello " + this.name + " 欢迎来到图书管理系统!");
    18.         System.out.println("1.查找图书");
    19.         System.out.println("2.新增图书");
    20.         System.out.println("3.删除图书");
    21.         System.out.println("4.显示图书");
    22.         System.out.println("0.退出系统");
    23.         System.out.println("请输入你的操作:");
    24.         Scanner scanner = new Scanner(System.in);
    25.         int choice = scanner.nextInt();
    26.         return choice;
    27.     }
    28. }

    src/user/NormalUser.java

    1. package user;
    2.  
    3.  
    4. import operation.*;
    5.  
    6. import java.util.Scanner;
    7. public class NormalUser extends User{
    8.     public NormalUser(String name){
    9.         super(name);
    10.         this.iOperation = new IOperation[]{
    11.                 new ExitOperation(),
    12.                 new FindOperation(),
    13.                 new BorrowOperation(),
    14.                 new ReturnOperation(),
    15.                 new DisplayOperation()
    16.         };
    17.     }
    18.  
    19.     public int menu(){
    20.         System.out.println("hello" + this.name + "欢迎来到图书管理系统");
    21.         System.out.println("1.查找图书");
    22.         System.out.println("2.借阅图书");
    23.         System.out.println("3.归还图书");
    24.         System.out.println("4.显示图书");
    25.         System.out.println("0.退出系统");
    26.         System.out.println("请输入你的操作:");
    27.         Scanner scanner = new Scanner(System.in);
    28.         int choice = scanner.nextInt();
    29.         return choice;
    30.     }
    31. }

    src/user/User.java

    1. package user;
    2.  
    3. import book.BookList;
    4. import operation.IOperation;
    5.  
    6. public abstract class User {
    7.     protected String name;//用户名
    8.     protected IOperation[] iOperation;
    9.     public User(String name){
    10.         this.name = name;
    11.     }
    12.     public abstract int menu();
    13.  
    14.     public void doOperation(int choice, BookList bookList){
    15.         this.iOperation[choice].word(bookList);
    16.     }
    17. }

    src/Main.java

    1. import book.BookList;
    2. import user.AdminUser;
    3. import user.NormalUser;
    4. import user.User;
    5.  
    6. import java.util.Scanner;
    7.  
    8. public class Main{
    9.     public static User Login(){
    10.         System.out.println("请输入你的姓名:");
    11.         Scanner scanner = new Scanner(System.in);
    12.         String name = scanner.nextLine();
    13.         System.out.println("请输入你的身份:1-》管理员、2-》普通用户");
    14.         int choice = scanner.nextInt();
    15.         if(choice == 1){
    16.             return new AdminUser(name);
    17.         }
    18.         else{
    19.             return new NormalUser(name);
    20.         }
    21.     }
    22.     public static void main(String[] args){
    23.         //初始化书架
    24.         BookList bookList = new BookList();
    25.         User user = Login();//动态绑定
    26.         while(true) {
    27.             int choice = user.menu();
    28.             user.doOperation(choice, bookList);
    29.         }
    30.  
    31.     }
    32. }

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  • 原文地址：https://blog.csdn.net/CYK_byte/article/details/126000845