本文实例为大家分享了Java实现小型图书馆管理系统的具体代码，供大家参考，具体内容如下

以下为小型图书馆管理系统模式图：

模式总体概述：

其中IBorrower接口确定Borrower类标准，Library类为单例设计模式，即图书馆只有一个。Book类为Borrower类的内部类，libraryBook类为Library类的内部类。最后利用PlatForm类进一步的封装。对于类方法中的核心，主要是数组的“增删查改”操作，本项目中三次运用了这些操作，分别在Borrower、Library、PlatForm类方法中。

IBorrower接口：

// package com.wu.demo;/*** @date 2020-10-30 10:08:48 * @author 一夜星尘* @version 1.8.0 */// 图书借阅人标准public interface IBorrower { public abstract void borrowBook(String bookName,String bookAuthor,float bookPrice,Library libary); public abstract void returnBook(String bookName,String bookAuthor,float bookPrice,Library libary);}

Borrower类：

// package com.wu.demo;/*** @date 2020-10-30 10:11:00 * @author 一夜星尘* @version 1.8.0 */public class Borrower implements IBorrower{ protected String borrowerName; protected long borrowerNumber; private int booksNumber; private static final int MAX_NUMBER_OF_BOOKS = 4; //最大借书容量 private Book[] books = new Book[MAX_NUMBER_OF_BOOKS]; public Borrower(String borrowerName,long borrowerNumber) { this.borrowerName = borrowerName; this.borrowerNumber = borrowerNumber; this.booksNumber = 0; } private class Book{ private String bookName; private String bookAuthor; private float bookPrice; public Book(String bookName,String bookAuthor,float bookPrice){ Book.this.bookName = bookName; Book.this.bookAuthor = bookAuthor; Book.this.bookPrice = bookPrice; } public String getName() { return Book.this.bookName; } public String getAuthor() { return Book.this.bookAuthor; } public float getPrice() { return Book.this.bookPrice; } } @Override /** * 借书操作 */ public void borrowBook(String bookName,String bookAuthor,float bookPrice,Library library) { if(booksNumber>=MAX_NUMBER_OF_BOOKS) { System.out.println("超过最大借书容量"); return; } books[booksNumber++] = new Book(bookName,bookAuthor,bookPrice); // 移除图书馆书籍,更新图书馆信息 library.removeBook( bookName,bookAuthor, bookPrice); } @Override /** * 还书操作 */ public void returnBook(String bookName,String bookAuthor,float bookPrice,Library library) { // 前提是有书的情况下 if(booksNumber<=0) { return; } int index = -1; for(int i = 0 ; i < books.length ; i++) { if(books[i].bookName.equals(bookName) && books[i].bookAuthor.equals(bookAuthor) && books[i].bookPrice == bookPrice) { index = i; break; } } if(index < 0) { System.out.println("你并没有该书籍"); return; } for(int i = 0; i < booksNumber-1 ; i++) { if(i>=index) { books[i] = books[i+1]; } } booksNumber --; // 还入图书馆,更新图书馆信息 library.addBook(bookName,bookAuthor,bookPrice); } /** * 借书人信息 */ public void borrowerInfo() { int i = 0; System.out.println("------------------------------借阅人信息------------------------------"); System.out.println("借阅人姓名："+this.borrowerName); System.out.println("借阅人学号："+this.borrowerNumber); for(;i < booksNumber ; i++) { System.out.println("第"+(i+1)+"本书: "); System.out.println("书籍名称："+books[i].getName()); System.out.println("书籍作者："+books[i].getAuthor()); System.out.println("书籍价格："+books[i].getPrice()); } System.out.println("当前借阅书本数为: "+booksNumber+" 剩余容量为: "+(MAX_NUMBER_OF_BOOKS-i)); System.out.println("------------------------------------------------------------------------"); } }

Library类：

// package com.wu.demo;/*** @date 2020-10-30 10:32:42 * @author 一夜星尘* @version 1.8.0 */public class Library { private static final Library library = new Library(); private static final int MAX_NUMBER_OF_BOOKS = 120; // 图书馆最大书容量 private libraryBook[] books = new libraryBook[MAX_NUMBER_OF_BOOKS]; protected static int booksNumber = 0; // 无参构造函数私有化 private Library() {}; private class libraryBook{ private String bookName; private String bookAuthor; private float bookPrice; public libraryBook(String bookName,String bookAuthor,float bookPrice){ libraryBook.this.bookName = bookName; libraryBook.this.bookAuthor = bookAuthor; libraryBook.this.bookPrice = bookPrice; } public void setName(String bookName) { libraryBook.this.bookName = bookName; } public void setAuthor(String bookAuthor) { libraryBook.this.bookAuthor = bookAuthor; } public void setPrice(float bookPrice) { libraryBook.this.bookPrice = bookPrice; } } // 唯一返回的单例 static Library getLibrary() { return library; } /** * 增添书籍 * @param bookName * @param bookAuthor * @param bookPrice */ public void addBook(String bookName,String bookAuthor,float bookPrice) { if(booksNumber>=MAX_NUMBER_OF_BOOKS) { System.out.println("超过图书馆书籍最大容量"); return; } books[booksNumber++] = new libraryBook(bookName,bookAuthor,bookPrice); } /** * 删除书籍 * @param bookName * @param bookAuthor * @param bookPrice */ public void removeBook(String bookName,String bookAuthor,float bookPrice) { int index = -1; for(int i = 0 ; i < booksNumber ; i++) { if(books[i].bookName.equals(bookName) && books[i].bookAuthor.equals(bookAuthor) && books[i].bookPrice == bookPrice) { index = i; break; } } if(index < 0) { System.out.println("该图书未在库"); return; } for(int i = 0;i < booksNumber - 1;i++) { if(index <= i) { books[i] = books[i+1]; } } booksNumber --; } /** * 查找书籍 * @param bookName * @param bookAuthor * @param bookPrice */ public void checkBook(String bookName,String bookAuthor,float bookPrice) { System.out.println(""); for(int i = 0 ; i<booksNumber ; i++) { if(books[i].bookName.equals(bookName) && books[i].bookAuthor.equals(bookAuthor) && books[i].bookPrice == bookPrice) { System.out.println("状态：书籍在库"); return; } } System.out.println("状态：书籍未在库"); System.out.println(""); } /** * 更改书籍信息 * @param bookName * @param bookAuthor * @param bookPrice */ public void changeBook(String bookName, String bookAuthor,float bookPrice,String newBookName, String newBookAuthor,float newBookPrice) { for(int i = 0 ;i<booksNumber;i++) { if(books[i].bookName.equals(bookName) && books[i].bookAuthor.equals(bookAuthor) && books[i].bookPrice == bookPrice) { books[i].setName(newBookName); books[i].setAuthor(newBookAuthor); books[i].setPrice(newBookPrice); break; } } System.out.println("更改书籍完成"); } /** * 查看当前图书馆书籍信息 */ public void booksInfo() { System.out.println("-----------------------------图书馆书籍信息-----------------------------"); for(int i = 0 ; i<booksNumber;i++) { System.out.println("在库书籍 "+(i+1)+" : "); System.out.println("书籍名称："+books[i].bookName); System.out.println("书籍作者："+books[i].bookAuthor); System.out.println("书籍价格："+books[i].bookPrice); } System.out.println("在库书籍总数："+booksNumber+" 剩余可借阅书籍总数："+(MAX_NUMBER_OF_BOOKS-booksNumber)); System.out.println("--------------------------------------------------------------------------"); }}

PlatForm类：

// package com.wu.demo;import java.util.Scanner;/*** @date 2020-10-30 14:06:34 * @author 一夜星尘* @version 1.8.0 */// 进一步封装public class PlatForm { private static final int MAX_NUMBER_OF_BORROWERS = 30; // 平台最多可注册30名借阅者 private Borrower[] borrowers = new Borrower[MAX_NUMBER_OF_BORROWERS]; private static int numberBorrowers = 0; private Library library = Library.getLibrary(); public PlatForm() { Scanner input = new Scanner(System.in); // 初始化Borrower成员 System.out.println("-----------------------------初始化借阅人-----------------------------"); System.out.println("按任意键继续(按Q或q退出)："); String exit = input.nextLine(); System.out.println("以下输入可借阅人员信息"); while(!exit.equalsIgnoreCase("q")) { System.out.print("姓名 学号："); String tempName = input.next(); long tempNumber = input.nextLong(); this.borrowers[numberBorrowers++] = new Borrower(tempName,tempNumber); // 回车输入舍弃 input.nextLine(); System.out.println("按任意键继续(按Q或q退出)："); exit = input.nextLine(); if(numberBorrowers >= MAX_NUMBER_OF_BORROWERS){ System.out.println("已达到最大注册量"); break; } } // 初始化图书馆信息 System.out.println("---------------------------初始化图书馆图书信息------------------------"); System.out.println("按任意键继续(按Q或q退出)："); exit = input.nextLine(); System.out.println("请输入原始书籍信息："); while(!exit.equalsIgnoreCase("q")) { System.out.print("书籍名称 作者 价格："); String tempName = input.next(); String tempAuthor = input.next(); float tempPrice = input.nextFloat(); library.addBook(tempName,tempAuthor,tempPrice); // 回车输入舍弃 input.nextLine(); System.out.println("按任意键继续(按Q或q退出)："); exit = input.nextLine(); } System.out.println("-----------------------------------------------------------------------"); input.close(); } /** * 平台管理：增添用户 * @param borrowerName * @param borrowerNumber */ public void addClient(String borrowerName,long borrowerNumber) { if(numberBorrowers >= MAX_NUMBER_OF_BORROWERS) { System.out.println("用户容量已达最大值"); return; } this.borrowers[numberBorrowers++] = new Borrower(borrowerName,borrowerNumber); System.out.println("增添用户操作成功"); } /** * 平台管理：移除用户 * @param borrowerName * @param borrowerNumber */ public void removeClient(String borrowerName,long borrowerNumber) { int index = -1; for(int i = 0 ; i<numberBorrowers; i++) { if(borrowers[i].borrowerName.equals(borrowerName) && borrowers[i].borrowerNumber == borrowerNumber) { index = i; break; } } if(index<0) { System.out.println("未找到用户"); return; } for(int i = 0 ; i < numberBorrowers-1;i++) { if(index <= i) { borrowers[i] = borrowers[i+1]; } } numberBorrowers--; System.out.println("移除用户成功"); } /** * 相应借阅人的信息 * @param borrowerName * @param borrowerNumber */ public void platformBorrowerInfo(String borrowerName,long borrowerNumber) { for(int i = 0 ; i<numberBorrowers;i++) { if(borrowers[i].borrowerName.equals(borrowerName) && borrowers[i].borrowerNumber == borrowerNumber) { borrowers[i].borrowerInfo(); return; } } System.out.println("该用户不存在"); } /** * 相应借阅人借阅书籍 * @param borrowerName * @param borrowerNumber * @param bookName * @param bookAuthor * @param bookPrice */ public void platformBorrowBook(String borrowerName,long borrowerNumber,String bookName,String bookAuthor, float bookPrice) { for(int i = 0 ; i<borrowers.length;i++) { if(borrowers[i].borrowerName.equals(borrowerName) && borrowers[i].borrowerNumber == borrowerNumber) { borrowers[i].borrowBook(bookName,bookAuthor, bookPrice, this.library); break; } } } /** * 相应借阅人归还书籍 * @param borrowerName * @param borrowerNumber * @param bookName * @param bookAuthor * @param bookPrice */ public void platformRrturnBook(String borrowerName,long borrowerNumber,String bookName,String bookAuthor, float bookPrice){ for(int i = 0 ; i<borrowers.length;i++) { if(borrowers[i].borrowerName.equals(borrowerName) && borrowers[i].borrowerNumber == borrowerNumber) { borrowers[i].returnBook(bookName,bookAuthor, bookPrice, library); break; } } } /** * 输出图书馆信息 */ public void platformLibraryInfo() { library.booksInfo(); } /** * 对图书馆增添书籍 * @param bookName * @param bookAuthor * @param bookPrice */ public void platformLibraryAddBook(String bookName,String bookAuthor,float bookPrice) { library.addBook(bookName,bookAuthor,bookPrice); } /** * 对图书馆移除书籍 * @param bookName * @param bookAuthor * @param bookPrice */ public void platformLibraryRemoveBook(String bookName,String bookAuthor,float bookPrice) { library.removeBook(bookName,bookAuthor,bookPrice); } /** * 对图书馆检索书籍 * @param bookName * @param bookAuthor * @param bookPrice */ public void platformLibraryCheckBook(String bookName,String bookAuthor,float bookPrice) { library.checkBook(bookName, bookAuthor, bookPrice); } /** * 对图书馆书籍更改 * @param bookName * @param bookAuthor * @param bookPrice * @param newBookName * @param newBookAuthor * @param newBookPrice */ public void platformLibraryChangeBook(String bookName,String bookAuthor,float bookPrice, String newBookName,String newBookAuthor,float newBookPrice) { library.changeBook(bookName, bookAuthor, bookPrice,newBookName,newBookAuthor,newBookPrice); }}

testDemo(测试)：

// package com.wu.demo;/*** @date 2020-10-30 10:51:21 * @author 一夜星尘* @version 1.8.0 */public class testDemo { public static void main(String[] args) { PlatForm platform = new PlatForm(); // 以下为平台管理权限的测试 platform.addClient("张三", 100000L); platform.addClient("李四", 100001L); platform.addClient("王五", 100002L); platform.addClient("赵六", 100003L); platform.platformBorrowerInfo("张三",100000L); platform.platformBorrowerInfo("李四",100000L); // 此时应该为不存在 platform.platformBorrowerInfo("王五",100002L); platform.platformBorrowerInfo("赵六",100003L); platform.removeClient("王五", 100002L); platform.platformBorrowerInfo("王五",100002L); // 此时王五不是用户 //以下为图书馆和借阅人的测试 platform.platformLibraryAddBook("数据结构","匿名1",100.0F); platform.platformLibraryAddBook("网络基础","匿名2",90.0F); platform.platformLibraryAddBook("算法","匿名3",110.0F); platform.platformLibraryInfo(); // 当前图书馆里只有3本书 platform.platformLibraryAddBook("java基础","匿名4",105.0F); platform.platformLibraryAddBook("深度学习","匿名5",129.0F); platform.platformLibraryAddBook("Linux基础","匿名6",104.0F); platform.platformLibraryAddBook("matlab基础","匿名7",123.0F); platform.platformLibraryAddBook("visual C++基础","匿名8",95.0F); platform.platformLibraryAddBook("HTML CSS JS","匿名9",99.0F); platform.platformLibraryAddBook("C++基础","匿名10",119.0F); platform.platformLibraryAddBook("python基础","匿名11",108.0F); platform.platformLibraryAddBook("数据库基础","匿名12",120.0F); platform.platformLibraryAddBook("操作系统基础","匿名13",106.0F); platform.platformLibraryInfo(); // 当前图书馆里有13本书 platform.platformLibraryRemoveBook("visual C++基础","匿名8",95.0F); platform.platformLibraryInfo(); // 当前图书馆里有12本书 platform.platformLibraryRemoveBook("Linux基础" ,"匿名6", 104.0F); // 检索图书 Linux基础 状态 platform.platformLibraryChangeBook("python基础", "匿名11", 108.0F,"keras基础","匿名11",110.0F); // 变更图书馆书籍名称 python基础 为 keras基础 platform.platformBorrowBook("张三", 100000L, "java基础", "匿名4", 105.0F); // 用户 张三 借了书籍 java基础 platform.platformBorrowBook("张三", 100000L, "算法", "匿名3", 110.0F); // 用户 张三 又借了书籍 算法 platform.platformBorrowBook("张三", 100000L, "C++基础", "匿名10", 119.0F); // 用户 张三 又借了书籍 C++基础 platform.platformBorrowBook("张三", 100000L, "深度学习", "匿名5", 129.0F); // 用户 张三 又借了书籍 深度学习 platform.platformBorrowBook("赵六", 100003L, "网络基础", "匿名2", 84.0F); // 用户 赵六 借了书籍 网络基础 platform.platformBorrowBook("李四", 100001L, "HTML CSS JS", "匿名9", 119.0F); // 用户 李四 借了书籍 HTML CSS JS platform.platformBorrowerInfo("张三", 100000L); // 查看用户 张三 借阅情况 当前用户 张三 有四本书 platform.platformBorrowerInfo("赵六", 100003L); // 查看用户 赵六 借阅情况 当前用户 赵六 有一本书 platform.platformBorrowerInfo("李四", 100001L); // 查看用户 李四 借阅情况 当前用户 李四 有一本书 platform.platformRrturnBook("张三", 100000L, "算法", "匿名3", 110.0F); // 用户 张三 还了书籍 算法 platform.platformRrturnBook("张三", 100000L, "深度学习", "匿名5", 129.0F); // 用户 张三 又还了书籍 深度学习 platform.platformBorrowerInfo("张三", 100000L); // 查看用户 张三 借阅情况 当前用户 张三 只有两本书 platform.platformLibraryRemoveBook("java基础" ,"匿名4", 105.0F); // 检索图书 java基础 状态 当前状态应该为 未在库 }}

测试结果显示：

更多学习资料请关注专题《管理系统开发》。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。