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Java实现迷你图书管理系统案例全程

作者:Java Fans

这篇文章主要为大家详细介绍了如何利用java语言实现简单的图书管理系统,文中示例代码介绍的非常详细,具有一定的参考价值,感兴趣的小伙伴们可以参考一下

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项目需求

为某图书馆开发一个迷你图书管理系统,实现图书的管理,包括如下功能:

(1)新增图书

(2)查看图书

(3)删除图书

(4)借出图书

(5)归还图书

(6)退出图书系统

覆盖知识

程序基本概念、数据类型、流程控制、顺序、选择 、循环、跳转语句、变量、类、方法、数据库、JDBC等相关知识

掌握数据库、JDBC、三层架构等相关知识。

掌握Druid连接池、Apache的DBUtils使用 。

开发思路

(1)明确需求

(2)编码顺序

1)、添加需要的jar包到项目中,将lib文件夹中的jar文件通过鼠标右单击选择Build Path的方式添加到你设置的eatJar文件目录里。

2)、创建database.properties文件,用来配置注册驱动和数据库连接对象的相关数据。

driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/java221804
username=root
password=huanghuang
initialSize=10
maxActive=30
maxIdle=5
maxWait=3000

3)、添加需要的工具类DBUtils类

package cn.book.utils;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
import javax.sql.DataSource;
import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.pool.DruidDataSourceFactory;
public class DBUtils {
	private static DruidDataSource druidDataSource;
	static {
		Properties properties = new Properties();
		try {
			InputStream is = DBUtils.class
					.getResourceAsStream("/database.properties");
			properties.load(is);
			druidDataSource = (DruidDataSource) DruidDataSourceFactory
					.createDataSource(properties);
		} catch (IOException e) {
			e.printStackTrace();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	public static DataSource getDataSource(){
		return druidDataSource;
	}
}

4)、创建数据表:book表

CREATE DATABASE IF NOT EXISTS `java221804`;
CREATE TABLE IF NOT EXISTS book(
	`name` VARCHAR(20),
	`state` INT,
	`date` INT,
	`count` INT
);

5)、编写book类,包含get/set方法、有参/无参构造、toString方法等

package cn.book.entity;
import java.io.Serializable;
@SuppressWarnings("serial")
public class Book implements Serializable {
	//定义属性
	private String name;
	private int state;
	private int date;
	private int count;
	//添加无参构造
	public Book() {
		super();
	}
	//添加有参构造
	public Book(String name, int state, int date, int count) {
		super();
		this.name = name;
		this.state = state;
		this.date = date;
		this.count = count;
	}
	//添加get/set方法
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public int getState() {
		return state;
	}
	public void setState(int state) {
		this.state = state;
	}
	public int getDate() {
		return date;
	}
	public void setDate(int date) {
		this.date = date;
	}
	public int getCount() {
		return count;
	}
	public void setCount(int count) {
		this.count = count;
	}
	@Override
	public String toString() {
		return "Book [name=" + name + ", state=" + state + ", date=" + date
				+ ", count=" + count + "]";
	}
}

6)、数据访问层DAO层的接口和实现类的增删改查方法的编写

7)、服务层Service层的接口和实现类的增删改查方法的编写

8)、最后完成视图层View层测试类的编写

开发步骤

1、数据初始化​

2、BookDaoImpl类中的部分重要方法

创建 QueryRunner 对象

private QueryRunner queryRunner = new QueryRunner(DBUtils.getDataSource());

增加图书的方法

	public int insert(Book book) {
		String sql = "insert into book(name,state,date,count) values(?,?,?,?);";
		Object[] args = { book.getName(), book.getState(), book.getDate(),
				book.getCount() };
		try {
			return queryRunner.update(sql, args);
		} catch (SQLException e) {
			e.printStackTrace();
		}
		return 0;
	}

更改图书信息的方法

	public int update(Book book) {
		String sql="update book set state=?,date=?,count=? where name=?; ";
		Object[] args={book.getState(),book.getDate(),book.getCount(),book.getName()};
		try {
			return queryRunner.update(sql, args);
		} catch (SQLException e) {
			e.printStackTrace();
		}
		return 0;
	}

查询全部图书的方法

	public List<Book> selectAll() {
		String sql = "SELECT * FROM book;";
		try {
			return queryRunner.query(sql, new BeanListHandler<Book>(Book.class) );
		} catch (SQLException e) {
			e.printStackTrace();
		}
		return null;
	}

欢迎使用迷你图书管理器方法

新增图书方法

查看图书方法

删除图书方法

借出图书方法

归还图书方法

退出图书方法

欢迎首界面:

	public static void useBookSystem() {
		// 输出欢迎菜单
		System.out.println("欢迎使用迷你图书管理器");
		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.退出图书");
		System.out.println("-------------------------");
	}

全部代码展示

1、Book类

package cn.book.entity;
import java.io.Serializable;
@SuppressWarnings("serial")
public class Book implements Serializable {
	//定义属性
	private String name;
	private int state;
	private int date;
	private int count;
	//添加无参构造
	public Book() {
		super();
	}
	//添加有参构造
	public Book(String name, int state, int date, int count) {
		super();
		this.name = name;
		this.state = state;
		this.date = date;
		this.count = count;
	}
	//添加get/set方法
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public int getState() {
		return state;
	}
	public void setState(int state) {
		this.state = state;
	}
	public int getDate() {
		return date;
	}
	public void setDate(int date) {
		this.date = date;
	}
	public int getCount() {
		return count;
	}
	public void setCount(int count) {
		this.count = count;
	}
	@Override
	public String toString() {
		return "Book [name=" + name + ", state=" + state + ", date=" + date
				+ ", count=" + count + "]";
	}
}

2、DBUtils类

(使用连接池DruidDataSource、Apache的知识)

package cn.book.utils;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
import javax.sql.DataSource;
import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.pool.DruidDataSourceFactory;
public class DBUtils {
	private static DruidDataSource druidDataSource;
	static {
		Properties properties = new Properties();
		try {
			InputStream is = DBUtils.class
					.getResourceAsStream("/database.properties");
			properties.load(is);
			druidDataSource = (DruidDataSource) DruidDataSourceFactory
					.createDataSource(properties);
		} catch (IOException e) {
			e.printStackTrace();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	public static DataSource getDataSource(){
		return druidDataSource;
	}
}

3、数据访问层的BookDao接口

package cn.book.dao;
import java.util.List;
import cn.book.entity.Book;
public interface BookDao {
	// 增
	public int insert(Book book);
	// 删
	public int delete(String name);
	// 改
	public int update(Book book);
	// 查一个
	public Book select(String name);
	// 查全部
	public List<Book> selectAll();
}

4、数据访问层的BookDaoImpl类

package cn.book.dao.impl;
import java.sql.SQLException;
import java.util.List;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;
import cn.book.dao.BookDao;
import cn.book.entity.Book;
import cn.book.utils.DBUtils;
public class BookDaoImpl implements BookDao {
	private QueryRunner queryRunner = new QueryRunner(DBUtils.getDataSource());
	@Override
	public int insert(Book book) {
		String sql = "insert into book(name,state,date,count) values(?,?,?,?);";
		Object[] args = { book.getName(), book.getState(), book.getDate(),
				book.getCount() };
		try {
			return queryRunner.update(sql, args);
		} catch (SQLException e) {
			e.printStackTrace();
		}
		return 0;
	}
	@Override
	public int delete(String name) {
		String sql="delete from book where name=?;";
		try {
			return queryRunner.update(sql, name);
		} catch (SQLException e) {
			e.printStackTrace();
		}
		return 0;
	}
	@Override
	public int update(Book book) {
		String sql="update book set state=?,date=?,count=? where name=?; ";
		Object[] args={book.getState(),book.getDate(),book.getCount(),book.getName()};
		try {
			return queryRunner.update(sql, args);
		} catch (SQLException e) {
			e.printStackTrace();
		}
		return 0;
	}
	@Override
	public Book select(String name) {
		String sql = "select * from book where name=?;";
		try {
			return queryRunner.query(sql,new BeanHandler<Book>(Book.class), name);
		} catch (SQLException e) {
			e.printStackTrace();
		}
		return null;
	}
	@Override
	public List<Book> selectAll() {
		String sql = "SELECT * FROM book;";
		try {
			return queryRunner.query(sql, new BeanListHandler<Book>(Book.class) );
		} catch (SQLException e) {
			e.printStackTrace();
		}
		return null;
	}
}

5、服务层的BookService接口

package cn.book.service;
import java.util.List;
import cn.book.entity.Book;
public interface BookService {
	// 增
	public int insertBook(Book book);
	// 删
	public int deleteBook(String name);
	// 改
	public int updateBook(Book book);
	// 查一个
	public Book selectBook(String name);
	// 查全部
	public List<Book> selectAllBooks();
}

6、服务层的BookServiceImpl类

package cn.book.service.impl;
import java.util.List;
import cn.book.dao.impl.BookDaoImpl;
import cn.book.entity.Book;
import cn.book.service.BookService;
public class BookServiceImpl implements BookService {
	BookDaoImpl bookDaoImpl = new BookDaoImpl();
	@Override
	public int insertBook(Book book) {
		if (bookDaoImpl.select(book.getName()) == null) {
			return bookDaoImpl.insert(book);
		}
		return 0;
	}
	@Override
	public int deleteBook(String name) {
		if (bookDaoImpl.select(name) != null) {
			return bookDaoImpl.delete(name);
		}
		return 0;
	}
	@Override
	public int updateBook(Book book) {
		if (bookDaoImpl.select(book.getName()) != null) {
			return bookDaoImpl.update(book);
		}
		return 0;
	}
	@Override
	public Book selectBook(String name) {
		bookDaoImpl.select(name);
		return null;
	}
	@Override
	public List<Book> selectAllBooks() {
		List<Book> listBooks = bookDaoImpl.selectAll();
		return listBooks;
	}
}

7、视图层BookMgr测试类

package cn.book.view;
import java.util.List;
import java.util.Scanner;
import cn.book.entity.Book;
import cn.book.service.impl.BookServiceImpl;
public class BookMgr {
	// 定义一个静态的Scanner
	static Scanner inputsc = new Scanner(System.in);
	// 是否退出系统,false代表退出系统
	static boolean flag = true;
	static int num = -1;
	static BookServiceImpl bookServiceImpl = new BookServiceImpl();
	// 欢迎使用迷你图书管理器方法
	public static void useBookSystem() {
		// 输出欢迎菜单
		System.out.println("欢迎使用迷你图书管理器");
		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.退出图书");
		System.out.println("-------------------------");
	}
	// 新增图书方法
	public static void addBook() {
		System.out.println("-->新增图书\n");
		System.out.println("请输入图书名称:");
		String bookName = inputsc.next();
		Book book = new Book(bookName, 0, 0, 0);
		// 向数据库添加图书
		int num = bookServiceImpl.insertBook(book);
		System.out.println();
		if (num != 0) {
			System.out.println("新增《" + bookName + "》成功!");
		} else {
			System.out.println("新增《" + bookName + "》失败!");
		}
		System.out.println("*****************************************");
	}
	// 查看图书方法
	public static void lookBook() {
		System.out.println("-->查看图书\n");
		System.out.println("序号\t状态\t名称\t借出日期\t借出次数");
		// 获取数据库全部图书
		List<Book> books = bookServiceImpl.selectAllBooks();
		for (int i = 0; i < books.size(); i++) {
			String BookState = (books.get(i).getState() == 0) ? "可借阅" : "已借出";
			String dateStr = (books.get(i).getDate() == 0) ? "" : (books.get(i)
					.getDate() + "日");
			System.out.println((i + 1) + "\t" + BookState + "\t"
					+ books.get(i).getName() + "\t" + dateStr + "\t"
					+ books.get(i).getCount() + "次");
		}
		System.out.println("*****************************************");
	}
	// 删除图书方法
	public static void delBook() {
		System.out.println("-->删除图书\n");
		System.out.println("请输入要删除图书的名称:");
		String deleteBook = inputsc.next();
		// 从数据库中查找此图书
		Book delBook = bookServiceImpl.selectBook(deleteBook);
		boolean flag3 = false;
		// 删除的图书存在、状态处于可借阅状态
		if (delBook.getName() != null && deleteBook.equals(delBook.getName())
				&& delBook.getState() == 0) {
			flag3 = true;
			int num = bookServiceImpl.deleteBook(delBook.getName());
			if (num != 0) {
				System.out.println("图书删除成功!");
			} else {
				System.out.println("图书删除失败!");
			}
		} else if (delBook.getName() != null
				&& deleteBook.equals(delBook.getName())
				&& delBook.getState() == 1) {
			flag3 = true;
			System.out.println("该图书已被借出,目前无法删除!");
		}
		if (!flag3) {
			System.out.println("没有找到匹配信息!");
		}
		System.out.println("*****************************************");
	}
	// 借出图书方法
	public static void lendBook() {
		System.out.println("-->借出图书\n");
		System.out.print("请输入图书名称:");
		String want = inputsc.next(); // 要借出的图书名称
		// 从数据库中查找此图书
		Book wantBook = bookServiceImpl.selectBook(want);
		if (wantBook == null) {
			System.out.println("没有找到匹配信息!");
		} else {
			if (want.equals(wantBook.getName()) && wantBook.getState() == 0) { // 找到匹配可借
				wantBook.setState(1); // 将此图书置于借出状态
				System.out.print("请输入借出日期:");
				int inputscData = inputsc.nextInt();
				wantBook.setDate(inputscData);
				while (wantBook.getDate() < 1 || wantBook.getDate() > 31) { // 当输入借出的日期不满足1-31时
					System.out.println("必须输入大于等于1且小于等于31的数字,请重新输入:");
					inputscData = inputsc.nextInt();
					wantBook.setDate(inputscData);
				}
				wantBook.setCount(wantBook.getCount() + 1);
				// 更新书本最新信息
				int num = bookServiceImpl.updateBook(wantBook);
				if (num != 0) {
					System.out.println("借出《" + want + "》成功!");
				} else {
					System.out.println("借出《" + want + "》失败!");
				}
			} else if (want.equals(wantBook.getName())
					&& wantBook.getState() == 1) { // 找到匹配已被借出
				System.out.println("《" + want + "》已被借出!");
			}
		}
		System.out.println("*****************************************");
	}
	// 归还图书方法
	public static void returnBook() {
		System.out.println("-->归还图书\n");
		int charge = 0; // 租金
		System.out.print("请输入归还图书名称:");
		String back = inputsc.next();
		// 从数据库中查找此图书
		Book backBook = bookServiceImpl.selectBook(back);
		if (backBook == null) {
			System.out.println("没有找到匹配信息!");
		} else {
			if (back.equals(backBook.getName()) && backBook.getDate() == 1) {// 找到匹配
				backBook.setDate(0); // 将借阅状态修改为可借阅
				System.out.print("请输入归还日期:");
				int redate = inputsc.nextInt();
				while (redate < backBook.getDate() || redate > 31) { //
					// 归还日期不能小于借出日期,也不能大于31
					if (redate < backBook.getDate()) {
						System.out.println("归还日期不能小于借出日期,请重新输入:");
					} else {
						System.out.println("一个月只有31天,请重新输入:");
					}
					redate = inputsc.nextInt();
				}
				charge = redate - backBook.getDate();
				// 更新书本最新信息
				int num = bookServiceImpl.updateBook(backBook);
				if (num != 0) {
					System.out.println("\n归还《" + back + "》成功!");
					System.out.println("借出日期为:" + (backBook.getDate() + 1)
							+ "日");
					System.out.println("归还日期为:" + redate + "日");
					System.out.println("应付租金(元):" + charge);
					backBook.setDate(0);
				} else {
					System.out.println("借出《" + back + "》失败!");
				}
			} else if (back.equals(backBook.getName())
					&& backBook.getState() == 0) {// 找到匹配但没有借出
				System.out.println("该图书没有被借出!无法进行归还操作。");
			}
		}
		System.out.println("*****************************************");
	}
	// 操作
	public static void runTest() {
		// 循环操作
		do {
			// 定义一个BookMethod操作类,将操作方法定义在BookMethod类中,然后调用
			// 欢迎菜单方法
			BookMgr.useBookSystem();
			System.out.println("请选择:");
			int choose = inputsc.nextInt();
			switch (choose) {
			case 1:
				// 新增图书
				BookMgr.addBook();
				break;
			case 2:
				// 查看图书
				BookMgr.lookBook();
				break;
			case 3:
				// 删除图书
				BookMgr.delBook();
				break;
			case 4:
				// 借出图书
				BookMgr.lendBook();
				break;
			case 5:
				// 归还图书
				BookMgr.returnBook();
				break;
			case 6:
				// 退出图书
				flag = false;
				break;
			default:
				flag = false;
				break;
			}
			if (flag) {
				System.out.println("输入0返回:");
				num = inputsc.nextInt();
			} else {
				break;
			}
		} while (num == 0);
		System.out.println("谢谢使用!");
	}
	public static void main(String[] args) {
		BookMgr.runTest();
	}
}

到此这篇关于Java实现迷你图书管理系统案例全程的文章就介绍到这了,更多相关Java图书管理内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家!

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