图书馆管理系统项目
不懂+v:w891123884
一、项目分布
二、实现效果
三、代码展示
/*1. book_manager
(1)Test.java*/
package book_manager;
import book_manager.book.BookList;
import book_manager.user.Admin;
import book_manager.user.NormalUser;
import book_manager.user.User;
import java.util.Scanner;
public class Test {
public static void main(String[] args) {
BookList list = new BookList();
User user = login();
while(true){
int choice = user.menu();
user.doOperation(choice, list);
}
}
public static User login(){
Scanner scanner = new Scanner(System.in);
System.out.println("请输入你的姓名");
String name = scanner.next();
System.out.println("请输入你的身份");
System.out.println("1.普通用户 2.管理员");
int role= scanner.nextInt();
if(role==1){
return new NormalUser(name);
}
else{
return new Admin(name);
}
}
}
/*所有包都在book_manage包里
利用面向对象的多态特性去除了很多if-else的判断，不同的子类在父类所对应的方法不同。
1.首先建立一个book包
包里面有2个类，一个是Book,这个类里面包含一本书的全部信息
另外一个类是BookList，这个类是用来管理每一个书，通过这个类来寻找每一本书。
private Book[] books = new Book[100];
Book数组里面存放所有的书。
2.再建立一个包Operation 这个类里面有一个OI接口，通过对接口里面的Work方法重写，来实现管理员身份和普通用户身份的不同操作。
3.最后建立一个User包，里面有三个类，User，Admin,NormalUser
Admin和NormalUser都继承自User.
User里秒你有一个数组
protected IO[] operation;
这个数组里面包含了用户或者管理员所具备的操作。
通过对数组的索引来确定具体需要调用的操作方法。
*/
/*2.book_manager.book
(1)Book.java*/
package book_manager.book;
public class Book {
private String name;
private String id;
private String author;
private int price;
private String type;
private boolean isBorrow;
public Book(String name, String id, String author, int price,String type, boolean isBorrow) {
this.name = name;
this.id = id;
this.author = author;
this.price = price;
this.type = type;
this.isBorrow = isBorrow;
}
public String toString() {
return "Book{" +"name='" + name + '\'' +", id='" + id + '\'' +", author='" + author + '\'' +", price=" + price +
", type='" + type + '\'' +", isBorrow=" + isBorrow +'}';
}
public String getName(){
return name;
}
public boolean isBorrow(){
return isBorrow;
}
public void setBorrow(boolean bool){
this.isBorrow=bool;
}
public String getId(){
return id;
}
}
/*(2)BookList.java*/
package book_manager.book;
public class BookList {
private Book[] books = new Book[100];
private int size;
public BookList(){
books[0] = new Book("三国演义","001", "罗贯中", 100,"古典名著", false);
books[1] = new Book("水浒传","002", "施耐庵", 100,"古典名著", false);
books[2] = new Book("西游记","003", "吴承恩", 100,"古典名著", false);
books[3] = new Book("红楼梦","003", "曹雪芹", 100,"古典名著", false);
size = 4;
}
public int getSize(){
return size;
}
public void setBooks(int index,Book book){
books[index]=book;
}
public void setSize(int size){
this.size=size;
}
public Book getBook(int index){
return books[index];
}
}
/*3.book_manager.Operation
(1) ADD.java*/
package book_manager.Operation;
import book_manager.book.*;
import java.util.Scanner;
public class ADD implements IO{
public void work(BookList bookList) {
try (Scanner scanner = new Scanner(System.in)) {
System.out.println("请输入书名");
String name =scanner.next();
System.out.println("请输入序号");
String id = scanner.next();
System.out.println("请输入作者");
String author =scanner.next();
System.out.println("请输入价格");
int price = scanner.nextInt();
System.out.println("请输入类型");
String type = scanner.next();
Book book = new Book(name, id,
author, price, type, false);
bookList.setBooks(bookList.getSize(),book);
}
bookList.setSize(bookList.getSize()+1);
System.out.println("添加成功");
}
}
/*(2)Borrow.java*/
package book_manager.Operation;
import book_manager.book.Book;
import book_manager.book.BookList;
import java.util.Scanner;
public class Borrow implements IO{
public void work(BookList bookList) {
int i=0;
int flag=0;
Scanner scan = new Scanner(System.in);
System.out.println("请输入需要借阅的书名");
String name = scan.next();
for(;i<bookList.getSize();i++){
if(name.equals(bookList.getBook(i).getName())){
if(bookList.getBook(i).isBorrow()==false){
System.out.println("借阅成功");
flag=1;
bookList.getBook(i).setBorrow(true);
}
}
}
if(flag==0){
System.out.println("不好意思，借阅失败");
}
}
}
/*(3)Delete.java*/
package book_manager.Operation;
import book_manager.book.BookList;
import java.util.Scanner;
public class Delete implements IO{
public void work(BookList bookList){
Scanner scanner = new Scanner(System.in);
System.out.println("请输入想要删除的编号");
String id = scanner.next();
for(int i=0;i<bookList.getSize();i++){
if(bookList.getBook(i).getId().equals(id)){
bookList.setBooks(i,bookList.getBook(bookList.getSize()));
bookList.setSize(bookList.getSize()-1);
System.out.println("删除成功");
}
else{
System.out.println("删除失败");
}
}
}
}
/*(4) Exit.java*/
package book_manager.Operation;
import book_manager.book.BookList;
public class Exit implements IO{
public void work(BookList bookList) {
System.out.println("退出成功");
System.exit(0);
}
}
/*(5)Find.java*/
package book_manager.Operation;
import book_manager.book.BookList;
import java.util.Scanner;
public class Find implements IO{
public void work(BookList bookList) {
int i=0;
int count=0;
Scanner scan = new Scanner(System.in);
System.out.println("请输入需要查找的书名");
String name = scan.next();
for(;i<bookList.getSize();i++){
if(name.equals(bookList.getBook(i).getName())){
count++;
}
}
if(count==0){
System.out.println("不好意思，没有找到");
}
else{
System.out.println("找到了，共计"+count+"本");
}
}
}
/*(6)IO.java*/
package book_manager.Operation;
import book_manager.book.BookList;
public interface IO {
abstract public void work(BookList bookList);
}
/*(7)PrintAll.java*/
package book_manager.Operation;
import book_manager.book.BookList;
public class PrintAll implements IO{
public void work(BookList bookList) {
for(int i=0;i<bookList.getSize();i++){
System.out.println(bookList.getBook(i));
}
}
}
/*(8)Return.java*/
package book_manager.Operation;
import book_manager.book.BookList;
import java.util.Scanner;
public class Return implements IO{
public void work(BookList bookList) {
int i=0;
int flag=0;
Scanner scan = new Scanner(System.in);
System.out.println("请输入需要归还的ID");
String id = scan.next();
for(;i<bookList.getSize();i++){
if(id.equals(bookList.getBook(i).getId())){
if(bookList.getBook(i).isBorrow()==true){
System.out.println("归还成功");
bookList.getBook(i).setBorrow(false);
flag=1;
}
else{
System.out.println("归还失败");
}
}
}
if(flag==0){
System.out.println("不好意思，没有此书");
}
}
}
/*4.book_manager.user
(1)Admin.java*/
package book_manager.user;
import book_manager.Operation.*;
import java.util.Scanner;
public class Admin extends User{
public Admin(String name){
super(name);
operation=new IO[]{
new Exit(),
new Find(),
new ADD(),
new Delete(),
new PrintAll(),
};
}
public int menu() {
System.out.println("============");
System.out.println("hello " + name);
System.out.println("1. 查找书籍");
System.out.println("2. 增加书籍");
System.out.println("3. 删除书籍");
System.out.println("4. 打印所有信息");
System.out.println("0. 退出");
System.out.println("============");
System.out.println("请输入您的选择: ");
Scanner scanner = new Scanner(System.in);
int choice = scanner.nextInt();
return choice;
}
}
/*(2)NormalUser.java*/
package book_manager.user;
import book_manager.Operation.*;
import java.util.Scanner;
public class NormalUser extends User{
public NormalUser(String name){
super(name);
operation=new IO[]{
new Exit(),
new Find(),
new Borrow(),
new Return(),
new PrintAll()
};
}
public int menu() {
System.out.println("============");
System.out.println("hello " + name);
System.out.println("1. 查找图书");
System.out.println("2. 借阅图书");
System.out.println("3. 归还图书");
System.out.println("4. 查看全部书籍");
System.out.println("0. 退出");
System.out.println("============");
System.out.println("请输入您的选择: ");
Scanner scanner = new Scanner(System.in);
int choice = scanner.nextInt();
return choice;
}
}
/*(3)User.java*/
package book_manager.user;
import book_manager.Operation.*;
import book_manager.Operation.IO;
import book_manager.book.BookList;
abstract public class User {
String name;
protected IO[] operation;
public User(String name){
this.name=name;
}
abstract public int menu();//该方法被重写
public void doOperation(int choice, BookList bookList) {
operation[choice].work(bookList);
}
}
四.总结
随着信息技术的发展，计算机已被广泛的应用于社会的各个领域，成为推动社会发展的技术动力。而在计算机应用中，软件的作用十分突出，软件已经发展成为信息技术的核心，主导着信息产品的开发和信息技术市场的进一步的开拓。软件产业已成为社会信息化进程中的一个战略性产业。在软件技术的应用中软件的开发技术尤其是应用型软件产品的开发技术成了重中之重。不断开发适应用户需求、市场需要的新型软件产品。尤其是在校园里，各种软件的应用无处不在，为我们的学习和生活提供了方便。
不懂+V：w891123884