Java实例---简单的超市管理系统

代码分析

Customer.java

package test;

public class Customer {
    
    private String name;
    private int customerType;
    
    @Override
    public String toString() {
        return "顾客姓名：" + name + "\n 会员级别=" + customerType
                + "\n";
    }
    
    public Customer(String name, int customerType) {
        super();
        this.name = name;
        this.customerType = customerType;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getCustomerType() {
        return customerType;
    }
    public void setCustomerType(int customerType) {
        this.customerType = customerType;
    }
    
    
    
}

Order.java

package test;

import java.util.Arrays;

public class Order {
    private Customer cus;
    private Product[] pros;
    

    public Order(Customer cus, Product[] pros) {
        super();
        this.cus = cus;
        this.pros = pros;
    }

    
    
    public double getCustomerMoney()
    {
        double  money = 0.0;
        for(Product pro:pros)
        {
            if(!pro.isOnSale())
                {
                if(cus.getCustomerType() == Type.Customer_GOLEAN)
                {
                    money = pro.getSumMoney() * 0.96;
                }else{
                    money = pro.getSumMoney() ;
                }
                }
            else if(cus.getCustomerType() == Type.Customer_Common)
                    {
                        money = pro.getSumMoney() * 0.99 ;
                    }
            else if(cus.getCustomerType() == Type.Customer_PRIVARY)
            {
                money = pro.getSumMoney() * 0.98;
            }
            else if(cus.getCustomerType() == Type.Customer_ADVANCE)
            {
                money = pro.getSumMoney() * 0.97;
            }else if(cus.getCustomerType() == Type.Customer_GOLEAN)
            {
                money = pro.getSumMoney() * 0.96;
            }
        }
        return money;
    }
    
    
    public Customer getCus() {
        return cus;
    }
    public void setCus(Customer cus) {
        this.cus = cus;
    }
    public Product[] getPros() {
        return pros;
    }
    public void setPros(Product[] pros) {
        this.pros = pros;
    }
    @Override
    public String toString() {
        String str = null;
        for(Product pro:pros)
        {
            str =  "======================================\n" + 
                    "顾客信息：" + cus.toString() + "\n" +
                    "-------------------------------\n" +
                    "商品信息：" + pro.toString() + "\n" +
                    "商品原价：" + pro.getSumMoney() +"\n" +
                        "会员价格："+ this.getCustomerMoney() + "\n" +
                        "======================================\n"; 
        }
        return str;
    }
    
    
}

Product.java

package test;

public class Product {

    private String name;
    private double price;
    private int num;
    private boolean onSale;
    
    public Product(String name, double price, int num, boolean onSale) {
        super();
        this.name = name;
        this.price = price;
        this.num = num;
        this.onSale = onSale;
    }
    
    public double getSumMoney()
    {
        return this.price * this.num;
    }
    
    @Override
    public String toString() {
        return "商品名称：" + name + "\n 商品价格：" + price + "\n 商品数量：" + num
                + "\n 是否促销：" + onSale + "\n";
    }


    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 int getNum() {
        return num;
    }
    public void setNum(int num) {
        this.num = num;
    }
    public boolean isOnSale() {
        return onSale;
    }
    public void setOnSale(boolean onSale) {
        this.onSale = onSale;
    }
    
}

Type.java

package test;

public class Type {
    
    public static int Customer_Common = 1;
    public static int Customer_PRIVARY = 2;
    public static int Customer_ADVANCE = 3;
    public static int Customer_GOLEAN = 4;
    
    public static int PRODUCT_ON_SALE = 5;
    public static int PRODUCT_NOT_SALE = 6;
}

Test.java

package test;

public class Test {

    public static void main(String[] args) {
        // TODO 自动生成的方法存根
        Product pro = new Product("小米",12.2, 4,false);
        Product pro1 = new Product("黄瓜",1.2, 6,false);
        Product pro2 = new Product("香蕉",2.2, 14,true);
        Product pro3 = new Product("果汁",7.8, 7,false);
        Product pro4 = new Product("面包",22.4, 5,true);
        
        Customer cus = new Customer("小明",1);
        Customer cus1 = new Customer("小白",2);
        Customer cus2 = new Customer("小王",3);
        
        Customer cus3 = new Customer("小贵",4);
        
        Order oder = new Order(cus, new Product[]{pro, pro4});
        Order oder1 = new Order(cus1, new Product[]{pro2, pro3});
        Order oder2 = new Order(cus2, new Product[]{pro1, pro3});
        Order oder3 = new Order(cus3, new Product[]{pro, pro4,pro2});
        
        System.out.println(oder.toString());
        System.out.println(oder1.toString());
        System.out.println(oder2.toString());
        System.out.println(oder3.toString());
    }

}

程序截图

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