Java图书管理系统---命令行-编程知识

Java图书管理系统---命令行

项目列表

Book包

Book类内包含book的基本属性

BookList类初始化图书列表并且提供图书的属性方法

User包

Administrator类

common类

operator包

功能接口

新增图书功能

借阅图书功能

删除图书功能

显示图书功能

查找图书功能

归还图书功能

结束释放资源功能

运行逻辑

项目列表

Book包

Book类内包含book的基本属性

package book;public class BooK {String name;//图书名String author;//图书作者float price;//图书价格String type;//图书类型boolean state;//图书状态 借/未借public BooK(String name, String author, float price, String type) {this.name = name;this.author = author;this.price = price;this.type = type;this.state = false;}@Overridepublic String toString() {return "book{" +"name='" + name + '\'' +", author='" + author + '\'' +", price=" + price +", type='" + type + '\'' +((state)?"借出":"未借出")+'}';}
}

BookList类初始化图书列表并且提供图书的属性方法

package book;
public class BookList {private BooK[] Books=new BooK[10];private int count;public BookList() {Books[0]=new BooK("a","a",10,"a");Books[1]=new BooK("b","b",10,"b");Books[2]=new BooK("c","c",10,"c");this.count=3;}public int getCount() {return count;}public void SetCount(int i){this.count=i;}//对书籍进行修改public void setBooks(int i,BooK books) {Books[i] = books;}public void AddSetBooks(int i,BooK books){Books[i] = books;this.count++;}//获取对应的书public BooK getPos(int i) {return Books[i];}//获取对应书的名字public String getBookName(int i){return Books[i].name;}//获取书籍的状态public boolean getBookState(int i){return Books[i].state;}public void TrueBookState(int i){Books[i].state=true;}public void FalseBookState(int i){Books[i].state=false;}
}

User包

Administrator类

package user;import book.BookList;
import operation.*;import java.util.Scanner;public class Administrator extends User{public Administrator(String name) {super(name);//接口数组this.iOperations=new IOperation[]{new Breakoperation(),new Findoperation(),new ADDoperation(),new Deleteoperation(),new Showoperation()};}@Overridepublic void DoOperation(int chick, BookList booklist) {//接收用户的选择和要操作的图书类//调用对应的操作和他重写的work方法，并把图书类booklist传入iOperations[chick].work(booklist);}@Overridepublic int menu() {System.out.println("1.查找图书\n2.新增图书\n3.删除图书\n4.显示图书\n0.退出系统\n请选择: ");Scanner scanner=new Scanner(System.in);int chick=scanner.nextInt();while(chick<0||chick>4){System.out.println("输入有误，请重新输入");System.out.println("请选择: ");chick=scanner.nextInt();}return chick;}
}

common类

package user;import book.BookList;
import operation.*;import java.util.Scanner;public class common extends User{public common(String name) {super(name);this.iOperations=new IOperation[]{new Breakoperation(),new Findoperation(),new Borrowoperation(),new Returnoperation(),new Showoperation()};}@Overridepublic void DoOperation(int chick, BookList booklist) {//接收用户的选择和要操作的图书类//调用对应的操作和他重写的work方法，并把图书类booklist传入iOperations[chick].work(booklist);}@Overridepublic int menu() {System.out.println("1.查找图书\n2.借阅图书\n3.归还图书\n4.查看图书\n0.退出系统\n请选择: ");Scanner scanner=new Scanner(System.in);int chick=scanner.nextInt();while(chick<0||chick>4){System.out.println("输入有误，请重新输入");System.out.println("请选择: ");chick=scanner.nextInt();}return chick;}
}

operator包

功能接口

public interface IOperation {public void work(BookList books);
}

新增图书功能

public class ADDoperation implements IOperation{@Overridepublic void work(BookList books) {Scanner scanner =new Scanner(System.in);System.out.println("请输入书名");String name = scanner.next();System.out.println("请输入作者");String author = scanner.next();System.out.println("请输入价格");float price = scanner.nextInt();System.out.println("请输入类型");String type = scanner.next();BooK book=new BooK(name,author,price,type);int cur=books.getCount();//在cur下标添加book书books.AddSetBooks(cur,book);System.out.println("添加成功");}
}

借阅图书功能

public class Borrowoperation implements IOperation{@Overridepublic void work(BookList books) {Scanner scanner=new Scanner(System.in);System.out.println("请输入要借阅的书");String name=scanner.next();int cur=books.getCount();for (int i = 0; i < cur; i++) {if(Objects.equals(name, books.getBookName(i))){if(!books.getBookState(i)){books.TrueBookState(i);System.out.println("成功借阅"+name);}else{System.out.println("该书已被借出");}}}}
}

删除图书功能

public class Deleteoperation implements IOperation{public void work(BookList bookList) {System.out.println("请输入要删除的书名");Scanner scanner=new Scanner(System.in);String name=scanner.next();int cur=bookList.getCount();String Bookname;int index=0;int i=0;for (; i < cur; i++){if(Objects.equals(name, Bookname = bookList.getBookName(i))){index=i;break;}}if(i==cur){System.out.println("未查找到此书");}else{//0 2//for (int j = index; j < cur-1; j++) {//books[j]=books[j+1]//获取书籍BooK book=bookList.getPos(j+1);bookList.setBooks(j,book);}bookList.SetCount(cur-1);}}
}

显示图书功能

public class Showoperation implements IOperation{@Overridepublic void work(BookList books) {int cur=books.getCount();for (int i = 0; i < cur; i++) {BooK book=books.getPos(i);System.out.println(book);}}
}

查找图书功能

public class Findoperation implements IOperation{@Overridepublic void work(BookList books) {System.out.println("请输入要查找的书名");Scanner scanner=new Scanner(System.in);String name=scanner.next();int cur=books.getCount();for (int i = 0; i < cur; i++){//用户输入的数据和类内数据进行判断时，不能用==要用equalsif(Objects.equals(name, books.getBookName(i))){BooK book=books.getPos(i);System.out.println(book);return;}}System.out.println("未查找到该书");}
}

归还图书功能

public class Returnoperation implements IOperation {@Overridepublic void work(BookList books) {Scanner scanner=new Scanner(System.in);System.out.println("请输入要归还的书");String name=scanner.next();int cur=books.getCount();for (int i = 0; i < cur; i++) {if(Objects.equals(name, books.getBookName(i))){if(!books.getBookState(i)){System.out.println("该书并未被借出");}else{books.FalseBookState(i);System.out.println("已成功归还"+name);}}}}
}

结束释放资源功能

public class Breakoperation implements IOperation{@Overridepublic void work(BookList books) {System.out.println("结束");int cur=books.getCount();for (int i = 0; i < cur; i++) {books.setBooks(i,null);}System.exit(0);}
}