图书管理系统

package edu.xcdq;

import java.util.Scanner;

public class BookManage {
BookSet bookSet = new BookSet();
Scanner sc = new Scanner(System.in);

public void initial() {
    Book Javajichujiaocheng = new Book();
    Javajichujiaocheng.name = "Java基础教程";
    Javajichujiaocheng.state =0;
    Javajichujiaocheng.date = "2015 - 7 - 1";
    Book shujukujishu = new Book();
    shujukujishu.name = "数据库技术";
    shujukujishu.state = 1;
    shujukujishu.date = "0";
    Book renyueshenhua = new Book();
    renyueshenhua.name = "人月神话";
    renyueshenhua.state = 1;
    renyueshenhua.date = "0";
    bookSet.books[0] = Javajichujiaocheng;
    bookSet.books[1] = shujukujishu;
    bookSet.books[2] = renyueshenhua;
}

public void startMenu() {
    boolean flag = true;
    do {
        System.out.println("欢迎使用图书管理系统");
        System.out.println("-----------------------");
        System.out.println("1.新增图书");
        System.out.println("2.查看图书");
        System.out.println("3.删除图书");
        System.out.println("4.借出图书");
        System.out.println("5.归还图书");
        System.out.println("6.退出");
        System.out.println("-------------------------");
        System.out.println("请选择要执行的操作：");
        int choice = sc.nextInt();
        switch (choice) {
            case 1:
                System.out.println("新增图书");
                add();
                break;
            case 2:
                System.out.println("查看图书");
                search();
                break;
            case 3:
                System.out.println("删除图书");
                delete();
                break;
            case 4:
                System.out.println("借出图书");
                sell();
                break;
            case 5:
                System.out.println("归还图书");
                gui();
                break;
            case 6:
                System.out.println("谢谢使用！");
                tuichu();
                flag = false;
                break;
            default:
                System.out.println("输入不符合要求，请重新选择哦！");
                break;
        }

    } while (flag);
}

public void search() {
    System.out.println("序号\t名称\t状态\t借出日期");
    for (int i = 0; i < bookSet.books.length; i++) {
        if (bookSet.books[i] != null) {
            bookSet.books[i].print(i + 1);
        }

    }
}

public void add() {
    System.out.println("请输入商品名称：");
    String name = sc.next();
    System.out.println("请输入状态：");
    int state = sc.nextInt();
    System.out.println("借出日期：");
    int date = sc.nextInt();
    Book book = new Book();
    book.name = name;
    book.state = state;
    //book.date  = date;
    for (int i = 0; i < bookSet.books.length; i++) {
        if (bookSet.books[i] == null) {
            bookSet.books[i] = book;
            break;
        }
    }

}

public void delete() {
    System.out.println("请输入书名序号：");
    boolean flag = true;
    int card = sc.nextInt();
    for (int i = 0; i < bookSet.books.length; i++) {
        if (bookSet.books[i] != null && (i + 1) == card) {
            int j = i;
            while (bookSet.books[j + 1] != null) {
                bookSet.books[j] = bookSet.books[j + 1];
                j++;
            }
            bookSet.books[j] = null;
            flag = true;
            break;
        } else {
            flag = false;
        }
    }
    if (flag) {
        System.out.println("删除成功！");
    } else {
        System.out.println("删除失败，请重新操作！");
    }

}
public void sell(){
    System.out.println("请输入你要借出的书名：");
    String name =sc.next();
    boolean flag =true;
    for (int i=0;i<bookSet.books.length;i++){
        if (bookSet.books[i]!=null&&bookSet.books[i].name.equals(name)){
            System.out.println("请输入这本书的状态：");
            int  state = sc.nextInt();
            if (state<=bookSet.books[i].state){
                bookSet.books[i].state=bookSet.books[i].state+state;
                bookSet.books[i].state=bookSet.books[i].state-state;
                flag=true;
            }else {
                System.out.println("这本书已经被借出，还没有归还！");
                flag=false;
            }
            break;
        }else {
            flag=false;
        }
    }
    if (flag){
        System.out.println("成功借出！");
    }else {
        System.out.println("借出失败！");
    }
}
 public  void gui(){
    System.out.println("请输入你要归还图书的名字：");
    String name = sc.next();
    System.out.println("归还图书的借出：");
   int i = sc.nextByte();
    System.out.println("归还图书的日期：");
     int shi = sc.nextByte();
     String y = sc.next();
     Book sc = new Book();
     sc.name = name;
     sc.date= y;
     sc.state= i;
     for (int j = 0 ;j < bookSet.books.length;j++){
         if (bookSet.books[j]==null){
      bookSet.books[j]=sc;
      break;
         }
           }
 }
 public  void tuichu(){
    System.out.println("您已成功退出！");
 }

}