java小项目水果摊

介绍

刚学完java 集合和IO流，想做了一个简单的小项目来练手，于是我就运用一些基础知识做了这个水果摊。水果摊的主要功能有：

1. 进货
2. 查看水果列表
3. 购买水果
4. 查看购物车
5. 结账
6. 退出

都是一些简单的功能，下面就来展示代码；

代码

主菜单

public class MyList {
	public static void main(String[] args) throws ClassNotFoundException, FileNotFoundException, IOException {
		System.out.println("欢迎来到水果摊");
		Scanner scanner =new Scanner(System.in);
		int f=0;
		while(true) {
			System.out.println("请选择业务类型：");
			System.out.println("0.进货，1.查看列表，2.购买水果，3.查看购物车，4.结账，5"
					+ "退出");
			int m =scanner.nextInt();
			switch(m) {
			case 0:Stock.Stock();
			break;
			case 1:Kind.Kind();	 
            break;
			case 2:Buy.Buy();
			break;
			case 3:Shoppings.Shoppings();
			break;
			case 4:Pay.Pay();
			break;
			case 5:System.out.println("感谢惠顾！");
			       f=1;
			break;
			 default:
				 System.out.println("输入错误，请重新输入");
			break;	
		}
			if(f==1)break;
	
	}

}
	}

进货

package com.vector.units;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
import com.vector.dao.Fruit;
import com.vector.service.FileOutput;

public class Stock {

	static List<Fruit> list;
	public static void Stock() throws FileNotFoundException {
		List<Fruit> list = new ArrayList<>();
		Scanner scanner = new Scanner(System.in);
		String name;
		double price;
		int i = 1;
		while (true) {
			System.out.println("请输入第" + i + "种水果的种类：");
			name = scanner.next();
			System.out.println("请输入第" + i + "种水果的价格：");
			price = scanner.nextInt();
			Fruit sg = new Fruit(name, price);
			list.add(sg);
			setList(list);
			System.out.println("输入0继续，输入1结束进货");
			i++;
			int f = scanner.nextInt();
			if (f == 1) {
				break;
			}
		}
		FileOutput.FileOutput();
	}
	public static List<Fruit> getList() {
		return list;
	}
	public static void setList(List<Fruit> list) {
		Stock.list = list;
	}
}

查看水果列表

package com.vector.units;
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.util.ArrayList;
import java.util.List;
import com.vector.dao.Fruit;
import com.vector.service.FileInput;
import com.vector.service.FileOutput;

public class Kind {
	static List<Fruit> list = new ArrayList<Fruit>();
	static Object ob;
	public static void Kind() throws ClassNotFoundException, FileNotFoundException, IOException {
		FileInput fileInput = new FileInput();
		list = (List<Fruit>) fileInput.FileInput().readObject();
		Kind.setList(list);
		System.out.println("总共有" + list.size() + "种水果，分别为：");
		for (Fruit s : list) {
			System.out.println(s);
		}
	}
	public static List<Fruit> getList() {
		return list;
	}
	public static void setList(List<Fruit> list) {
		Kind.list = list;
	}
	public static Object getOb() {
		return ob;
	}
	public static void setOb(Object ob) {
		Kind.ob = ob;
	}
}

购买水果

package com.vector.units;

import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Scanner;
import java.util.Set;

import com.vector.dao.Fruit;
import com.vector.service.Mapp;

public class Buy {
	static String name;
	static List<Integer> M;

	static Map<String, Double> fruit3;

	public static void Buy() throws FileNotFoundException {
		Map<String, Fruit> fruit = Mapp.Mapp();
		Map<String, Double> fruit2 = Mapp.Mapp1();
		Map<String, Double> fruit3 = Mapp.Mapp2();
		String name;
		int m;
		List<Integer> M = new ArrayList<>();
		Scanner scanner = new Scanner(System.in);
		while (true) {
			System.out.println("请输入你要购买的水果名称：");
			name = scanner.next();
			Buy.setName(name);
			if (fruit.get(name) == null) {
				System.out.println("输入错误，请重新选择输入！");
				break;
			}
			System.out.println(fruit.get(name));
			int f1 = 0;
			Set ss1 = fruit3.entrySet();
			Iterator it = ss1.iterator();
			int t = 0;
			int n = 0;
			while (it.hasNext()) {
				Object obj = it.next();
				Map.Entry entry = (Map.Entry) obj;

				if (entry.getKey().equals(name)) {
					t = 1;
					break;
				}
				n++;
			}
			int m1;
			int m2;
			if (t == 1) {
				System.out.println("请输入购买的斤数：");
				m1 = scanner.nextInt();
				m2 = m1 + M.get(n);
				M.set(n, m2);
			} else {
				fruit3.put(name, fruit2.get(name));
				// System.out.println(fruit3.get(name));
				System.out.println("请输入购买的斤数：");
				m = scanner.nextInt();
				M.add(m);
			}
			Buy.setFruit3(fruit3);
			System.out.println("输入0继续，输入1结束");
			int f = scanner.nextInt();
			if (f == 1) {
				break;
			}
		}
		Buy.setM(M);
	}

	public static String getName() {
		return name;
	}

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

	public static Map<String, Double> getFruit3() {
		return fruit3;
	}

	public static List<Integer> getM() {
		return M;
	}

	public static void setM(List<Integer> m) {
		M = m;
	}

	public static void setFruit3(Map<String, Double> fruit3) {
		Buy.fruit3 = fruit3;
	}

}

购物车

package com.vector.units;

import java.io.FileNotFoundException;
import java.util.List;
import java.util.Map;
import com.vector.units.Buy;
import com.vector.service.Mapp;

public class Shoppings {
	static double Total;

	public static void Shoppings() throws FileNotFoundException {
		Map<String, Double> fruit = Buy.getFruit3();

		double n = 0;
		List<Integer> M = Buy.getM();
		int m = 0;
		for (String key : fruit.keySet()) {
			System.out.println("水果名称： " + key + "，水果的价格：" + fruit.get(key) + "/斤" + "水果的数量" + M.get(m) + "斤");
			n += M.get(m) * fruit.get(key);
			m++;
		}
		Shoppings.setTotal(n);
	}

	public static double getTotal() {
		return Total;
	}

	public static void setTotal(double total) {
		Total = total;
	}

}

结账

package com.vector.units;

public class Pay {

	public static void Pay() {
		double inTotal = Shoppings.getTotal();
		System.out.println("请付钱"+inTotal+"元");	
	}
}

下面的类都是一些用于实现功能的其他类
水果信息

package com.vector.dao;

import java.io.Serializable;

public class Fruit implements Serializable {
	String name;
	double price;

	public String getName() {
		return name;
	}

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

	public double getPrice() {
		return price;
	}

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

	public Fruit(String name, double price) {
		super();
		this.name = name;
		this.price = price;
	}

	@Override
	public String toString() {
		return "水果名称:" + name + "，价格" + price + "/斤";
	}
}

写出文件

public class FileOutput {
	public static FileOutputStream FileOutput() throws FileNotFoundException {
		
		File file =new File ("D:\\eclip\\Fruit\\list1.txt");
		FileOutputStream fileOut = new FileOutputStream(file);
		try {
			ObjectOutputStream objectOut =new ObjectOutputStream(fileOut);
			objectOut.writeObject(Kind.getList());
			objectOut.close();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return fileOut;
	}
}

读入

package com.vector.service;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.ObjectInputStream;

public class FileInput {
	public ObjectInputStream FileInput() throws FileNotFoundException, IOException {
	ObjectInputStream in=new ObjectInputStream(new FileInputStream(new File("D:\\eclip\\Fruit\\list1.txt")));
	return in;
}
}

Map工具类

package com.vector.service;

import java.io.FileNotFoundException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import com.vector.dao.Fruit;
import com.vector.units.Kind;
import com.vector.units.Stock;

public class Mapp {
	public static Map<String, Fruit> Mapp() throws FileNotFoundException {
		List<Fruit> list = Kind.getList();
		Map<String, Fruit> fruit = new HashMap<String, Fruit>();
		for (Fruit list1 : list) {
			fruit.put(list1.getName(), list1);
		}
		return fruit;
	}

	public static Map<String, Double> Mapp1() throws FileNotFoundException {
		List<Fruit> list = Kind.getList();
		Map<String, Double> fruit2 = new HashMap<String, Double>();
		for (Fruit list2 : list) {
			fruit2.put(list2.getName(), list2.getPrice());
		}
		return fruit2;
	}

	public static Map<String, Double> Mapp2() throws FileNotFoundException {
		Map<String, Double> fruit3 = new HashMap<String, Double>();
		return fruit3;
	}
}

总结

由于是用来练习的小项目，代码写的有些粗糙，还望大家见谅。
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看都看完了，还不三连鼓励一下吗

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