簡易圖書管理系統——Java實作

本人還是小白，閑來無事，跟著網路上大牛們學習了這段程式，本身難度并不大，但自己在很多細節地方考慮的還是不夠周全，一些功能還未實作，代碼的可讀性也不是很高，所以還請各位大牛能多指點！

主要分為3類，書本類Book，圖書管理類LibraryManager，測驗類Test，

Java Date格式化輸出自行在CSDN上自己找哈，有很多，我在這里就偷個懶，嘻嘻！

代碼附上：

Book類：

主要就是書本屬性，以及set與get方法，可根據自身需求修改

import java.util.Date;

public class Book {
    private String name;//書名
    private int id;//序列號
    private int price;//價格
    private String authon;//作者
    private boolean statc = true;//借閱狀態ture在館，false借出
    private Date borrowData;//借閱日期
    private int count;//被借次數

    public Date getBorrowData() {
        return borrowData;
    }

    public void setBorrowData(Date borrowData) {
        this.borrowData = borrowData;
    }

    public int getCount() {
        return count;
    }

    public void setCount() {
        this.count++;
    }

    public boolean getStatc() {
        return statc;
    }

    public void setStatc(boolean statc) {
        this.statc = statc;
    }

    public Book(String name, int id, int price, String authon) {//建構式
        this.name = name;
        this.id = id;
        this.price = price;
        this.authon = authon;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public int getPrice() {
        return price;
    }

    public void setPrice(int price) {
        this.price = price;
    }

    public String getAuthon() {
        return authon;
    }

    public void setAuthon(String authon) {
        this.authon = authon;
    }
}

LibraryManager類：

其中注釋掉的是重復的
可讀性有點差勁，希望大牛們多指點！

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Scanner;


public class LibraryManager {
    private Book[] book = new Book[10];//創建陣列存盤書本
    Scanner input = new Scanner(System.in);
    Date date = new Date();
    DateFormat format = new SimpleDateFormat("yyyy-MM-dd");

    public void init(){//初始化
        Book book1 = new Book("《平凡的世界》",01,50,"賈平凹");
        Book book2 = new Book("《巴黎圣母院》",02,35,"雨果");
        Book book3 = new Book("《金陵十三釵》",03,26,"嚴歌苓");
        book[0] = book1;
        book[1] = book2;
        book[2] = book3;
    }

    public void menu(){//界面選擇
        System.out.println("-------歡迎進入圖書管理系統--------");
        System.out.println("請根據提示選擇:");
        System.out.println("1.增加圖書\t\t2.洗掉圖書\t\t3.借閱圖書\n4.歸還圖書\t\t5.圖書借閱排行\t"+"6.書籍目錄\n"+"0.退出系統");
        int choice = input.nextInt();
        switch (choice){
            case 1:
                addBook();
                break;
            case 2:
                deleteBook();
                break;
            case 3:
                checkOutBook();
                break;
            case 4:
                returnBook();
                break;
            case 5:
                rankBook();
                break;
            case 6:
                showBook();
                break;
            case 0:
                System.exit(0);
            default:
        }
    }

    public void showBook(){//輸出圖書
        for(Book x :book) {
            if (x!=null) {
                if (x.getStatc())
                    System.out.println("名稱：" + x.getName() +
                            "\t\t\t序列號：" + x.getId() + "\t\t作者：" + x.getAuthon() +
                            "\t\t被借"+x.getCount()+"次"+"\t\t狀態：入藏");
                else
                    System.out.println("名稱：" + x.getName() +
                            "\t\t\t序列號：" + x.getId() + "\t\t作者：" + x.getAuthon() +
                            "\t\t被借"+x.getCount()+"次"+"\t\t狀態："+format.format(x.getBorrowData())+"借出");
            }
        }
    }

    public void rankBook() {//按借閱次數降序排序
        Book[] tempbook = new Book[book.length];//創建一個臨時陣列使之等于原陣列
        for(int i = 0;i<book.length;i++){
            if(book[i] != null){
                tempbook[i] = book[i];
            }
        }
        System.out.println("借書次數由高到低為:");
        int i, j;
        for (i = 0;i < tempbook.length-1;i++) {//冒泡排序
            for (j = 0; j < tempbook.length - i - 1; j++) {
                if (tempbook[j] != null && tempbook[j + 1] != null) {
                    if (tempbook[j].getCount() < tempbook[j + 1].getCount()) {
                        Book temp = tempbook[j];
                        tempbook[j] = tempbook[j + 1];
                        tempbook[j + 1] = temp;
                    }
                }
            }
        }

        for (Book x : tempbook) {
            if (x != null) {
                if (x.getStatc())
                    System.out.println("名稱：" + x.getName() +
                            "\t\t序列號：" + x.getId() + "\t\t作者：" + x.getAuthon() +
                            "\t\t被借" + x.getCount() + "次" + "\t\t狀態：入藏");
                else
                    System.out.println("名稱：" + x.getName() +
                            "\t\t序列號：" + x.getId() + "\t\t作者：" + x.getAuthon() +
                            "\t\t被借" + x.getCount() + "次" + "\t\t狀態：" + x.getBorrowData() + "借出");
            }
        }
    }
    
    public void addBook(){//增加圖書
        String name,authon;
        int id,price,i;
        System.out.println("請輸入書籍名稱,序列號,價格,作者");
        name = input.next();
        id = input.nextInt();
        price = input.nextInt();
        authon = input.next();
        Book temp = new Book(name,id,price,authon);
        for(i = 0;i<book.length;i++){
            if(book[i]==null)
                break;
        }
        book[i] = temp;
    }

    public int findName(int location){//查找與name相同的下標
        String name = input.next();
        for(int j = 0;j < book.length;j++){
            if(book[j].getName().equals(name)){
                location = j;
                break;
            }
        }
        return location;
    }

    public int findId(int location){//查找與序列號相同的下標
        int n = input.nextInt();
        for(int j = 0;j < book.length;j++){
            if(book[j].getId()==n){
                location = j;
                break;
            }
        }
        return location;
    }

    public void deleteBook(){//洗掉圖書
        System.out.println("1.按名稱洗掉\t"+"2.按序列號洗掉");
        int i = input.nextInt(),location = -1;//待洗掉下標
        switch (i){
            case 1:
                System.out.println("請輸入要洗掉的書籍名稱:");
//                String name = input.next();
//                for(int j = 0;j < book.length;j++){
//                    if(book[j].getName().equals(name)){
//                        location = j;
//                        break;
//                    }
//                }
                location = findName(location);
                break;
            case 2:
                System.out.println("請輸入要洗掉書籍的序列號:");
//                int n = input.nextInt();
//                for(int j = 0;j < book.length;j++){
//                    if(book[j].getId()==n){
//                        location = j;
//                        break;
//                    }
//                }
                location = findId(location);
                break;
        }
        //進行移動
        int start = location,end;
        int nulllocation = book.length;//null的下標
        for(int j = 0;j<book.length;j++){
            if(book[j] == null) {
                nulllocation = j;
                break;
            }
        }
        end = nulllocation-1;
        for(int j = start;j < end;j++){
            if(j==book.length-1)
                book[j] = null;
            else
                book[j] = book[j+1];
        }
        book[end] = null;
    }

    public void checkOutBook(){//借閱圖書
        System.out.println("1.按名稱借閱\t"+"2.按序列號借閱");
        int i = input.nextInt(),location = -1;//待借閱下標
        switch (i){
            case 1:
                System.out.println("請輸入要借閱的書籍名稱:");
//                String name = input.next();
//                for(int j = 0;j < book.length;j++){
//                    if(book[j].getName().equals(name)){
//                        location = j;
//                        break;
//                    }
//                }
                location = findName(location);
                break;
            case 2:
                System.out.println("請輸入要借閱書籍的序列號:");
//                int n = input.nextInt();
//                for(int j = 0;j < book.length;j++){
//                    if(book[j].getId()==n){
//                        location = j;
//                        break;
//                    }
//                }
                location = findId(location);
                break;
        }

        book[location].setCount();//被借次數+1
        if(book[location].getStatc()){
            Date time = new Date();
            book[location].setBorrowData(time);
            book[location].setStatc(false);
        }else {
            System.out.println(book[location].getName()+"于"+book[location].getBorrowData()+"已借出！");
        }
    }

    public void returnBook(){//歸還圖書
        System.out.println("1.按書名歸還\t2.按序列號歸還");
        int i = input.nextInt(),location = -1;//待歸還下標
        switch (i){
            case 1:
                System.out.println("請輸入你要歸還的書名");
//                String name = input.next();
//                for(int j = 0;j < book.length;j++){
//                    if(book[j].getName().equals(name)){
//                        location = j;
//                        break;
//                    }
//                }
                location = findName(location);
                break;
            case 2:
                System.out.println("請輸入你要歸還的序列號");
//                int n = input.nextInt();
//                for(int j = 0;j < book.length;j++){
//                    if(book[j].getId()==n){
//                        location = j;
//                        break;
//                    }
//                }
                location = findId(location);
                break;
        }
        book[location].setStatc(true);
        book[location].setBorrowData(null);
    }
}

Test類：

import java.util.Scanner;

public class Test {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        String n = null;
        LibraryManager manager = new LibraryManager();
        manager.init();
        do {//控制是否退出
            manager.menu();
            System.out.println("回主選單？y(是)/其他(結束)");
            n = input.next();
        }while ("y".equals(n));
    }
}

運行結果圖：