Java-简陋的图书管理

本文代码为原创一个简陋的管理系统，只做功能的测试。并没有去完善所有应有的功能，只做了输入输出查找。仅供参考！

菜单部分：

 import java.util.Scanner;
 public class Menu {
     int Min = 1;
     int Max = 3;
     public void getMenu(){
         System.out.println("1、显示/2、输入/3、查找");
     }
     public void getFindMenu(){
         System.out.println("1、编号/2、书名/3、作者");
     }
     public int setMenu(){
         System.out.println("输入序号:");
         Scanner reader = new Scanner(System.in);
         int num = reader.nextInt();
         if(num >= Min || num <= Max)
             return num;
         else
             return -1;
     }
 }

重点的管理部分：

 import java.io.File;
 import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
 import java.util.Scanner;
 import java.io.IOException;

 public class Book {
     public void find(){
         Menu menu = new Menu();
         menu.getFindMenu();
         Scanner reader = new Scanner(System.in);
         int num = menu.setMenu();
         switch(num){
         case 1:
             System.out.println("请输入编号");
             Find(reader.next(), 0);
             break;
         case 2:
             System.out.println("请输入书名");
             Find(reader.next(), 1);
             break;
         case 3:
             System.out.println("请输入作者");
             Find(reader.next(), 2);
             break;
         }
     }
     public void Find(String s,int n){
         try {
             Scanner in = new Scanner(new File("res/Book.txt"));
             while (in.hasNextLine()) {
                 String str = in.nextLine();
                 String[] book = str.trim().split("#");
                 if(book[n].compareTo(s) == 0)
                     System.out.println(book[0] +"  "+ book[1] +"  "+ book[2]);
             }
         } catch (FileNotFoundException e) {
             e.printStackTrace();
         }
     }
     public String findNum(String s,int n){
         try {
             Scanner in = new Scanner(new File("res/Book.txt"));
             while (in.hasNextLine()) {
                 String str = in.nextLine();
                 String[] book = str.trim().split("#");
                 if(book[n].compareTo(s) == 0)
                     return book[n];
             }
         } catch (FileNotFoundException e) {
             e.printStackTrace();
         }
         return "没有找到";
     }
     public String message(){
         Scanner reader = new Scanner(System.in);
         String str = "";
         String s = "";
         System.out.println("请输入编号");
         str = reader.next();
         if(findNum(str,0).compareTo("没有找到") != 0){
             System.out.println("此编号存在输入错误");
             return "@@!!";
         }
         s += str + "#";
         System.out.println("请输入书名");
         str = reader.next();
         s += str + "#";
         System.out.println("请输入作者");
         str = reader.next();
         s += str + "#\n";
         return s;
     }
     public void setBook() {
         FileOutputStream fop = null;
         File file;
         String content = message();
         if(content.compareTo("@@!!") == 0)
             return ;
         try {
             file = new File("res/Book.txt");
             fop = new FileOutputStream(file,true);
             byte[] contentInBytes = content.getBytes();
             fop.write(contentInBytes);
             fop.flush();
             fop.close();
             System.out.println("Done");
         } catch (IOException e) {
             e.printStackTrace();
         } finally {
             try {
                 if (fop != null) {
                     fop.close();
                 }
             } catch (IOException e) {
                 e.printStackTrace();
             }
         }
     }

     public void getBook() {
         try {
             Scanner in = new Scanner(new File("res/Book.txt"));
             while (in.hasNextLine()) {
                 String str = in.nextLine();
                 splitt(str);
             }
         } catch (FileNotFoundException e) {
             e.printStackTrace();
         }
     }

     public static String[] splitt(String str) {
         String[] book = str.trim().split("#");
         for (int i = 0; i < book.length; i++) {
             System.out.println(book[i]);
         }
         System.out.println("\n*********************");
         return book;
     }
 }

主函数部分：

 public class ManageBook {

     public static void main(String[] agse){
         Menu menu = new Menu();
         Book book = new Book();
         while(true){
             menu.getMenu();
             int num = menu.setMenu();
             switch(num){
                 case 1:
                     book.getBook();
                     break;
                 case 2:
                     book.setBook();
                     break;
                 case 3:
                     book.find();
                     break;
                 case -1:
                     System.out.println("输入有误");
                     break;
                 }
         }
     }

 }