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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