Java-based online shopping cart program and java-based online shopping cart

Java-based online shopping cart program and java-based online shopping cart

Use java code to write a simple online shopping cart program for your reference. The specific content is as follows:

Requirements:

1. Write a product category, which includes the product ID, product name, product category, and unit price.

2. Write a commodity item information class with two attributes: commodity and quantity, and the total price method of the commodity.

3. Write a shopping cart class, including adding a commodity method, viewing the order information, deleting a commodity, modifying the commodity, clearing the shopping cart, and calculating the total amount of all commodities in the shopping cart. 4. Write a test class and test the above method.

Product Type:

Public class Product {private int productId; // Product no. private String productName; // Product name private String category; // Product category private double price; // unit price public Product () {// super ();} public Product (int productId, String productName, String category, double price) {super (); this. productId = productId; this. productName = productName; this. category = category; this. price = price;} public String toString () {return "Product [productId =" + productId + ", productName =" + productName + ", category =" + category + ", price = "+ price +"] ";} public int getProductId () {return productId;} public void setProductId (int productId) {this. productId = productId;} public String getProductName () {return productName;} public void setProductName (String productName) {this. productName = productName;} public String getCategory () {return category;} public void setCategory (String category) {this. category = category;} public double getPrice () {return price;} public void setPrice (double price) {this. price = price ;}}

Item information:

Public class ProductItem {private Product product; // private int count of the purchased item; // number of items public double totalMoney () {// subtotal double price = product. getPrice (); // returns price * count;} public ProductItem () {super ();} public ProductItem (Product product, int count) {super (); this. product = product; this. count = count;} public Product getProduct () {return product;} public void setProduct (Product product) {this. product = product;} public int getCount () {return count;} public void setCount (int count) {this. count = count ;}}

Shopping cart type:

Import java. util. collection; import java. util. iterator; import java. util. linkedHashMap; import java. util. map; public class ShoppingCart {// shopping cart // key: item No. value: item entry private Map <Integer, ProductItem> map = new LinkedHashMap <Integer, ProductItem> (); public void addProduct (Product p) {// Add Product int productId = p. getProductId (); if (map. containsKey (productId) {ProductItem productItem = map. get (productId); productItem. setCount (productItem. getCount () + 1);} else {map. put (productId, new ProductItem (p, 1) ;}} public void showAll () {// view order information Collection <ProductItem> productItems = map. values (); Iterator <ProductItem> iterator = productItems. iterator (); while (iterator. hasNext () {ProductItem productItem = iterator. next (); Product product = productItem. getProduct (); System. out. println ("product No.:" + product. getProductId () + ", product name:" + product. getProductName () + ", unit price:" + product. getPrice () + ", quantity:" + productItem. getCount () + ", subtotal:" + productItem. totalMoney () ;}} public boolean deleteProduct (int productId) {// delete a product if (map. containsKey (productId) {map. remove (productId); return true;} return false;} public boolean modifyProduct (int productId, int count) {// modify if (map. containsKey (productId) {if (count> = 1) {ProductItem productItem = map. get (productId); productItem. setCount (count); return true;} else if (count = 0) {// Delete the eproduct (productId); return true ;}} return false ;} public void clearCart () {// clear the map of the shopping cart. clear ();} public double totalAllMoney () {// total item money count double total = 0; Collection <ProductItem> productItems = map. values (); Iterator <ProductItem> iterator = productItems. iterator (); while (iterator. hasNext () {ProductItem productItem = iterator. next (); double money = productItem. totalMoney (); total + = money;} return total ;}}

Test class:

Public class ShoppingCartTest {public static void main (String [] args) {ShoppingCart cart = new ShoppingCart (); Product p1 = new Product (101, "Asus Notebook", "Notebook ", 4599); Product p2 = new Product (102, "apple", "Fruit", 5.9); Product p3 = new Product (103, "Color TV", "Household Appliances ", 2799); Product p4 = new Product (104, "Autumn pants", "clothing", 128); Product p5 = new Product (105, " mobile phone", "Mobile Phone ", 2998); Product p6 = new Product (101, "Asus Notebook", "Notebook", 4599); // test the cart used to buy two products. a DdProduct (p1); cart. addProduct (p2); cart. addProduct (p3); cart. addProduct (p4); cart. addProduct (p5); cart. addProduct (p6); cart. showAll (); System. out. println ("###########"); boolean flag = cart. deleteProduct (p2.getProductId (); if (flag) {System. out. println ("product number:" + p2.getProductId () + "is deleted successfully! ");} Else {System. out. println ("failed to delete");} cart. showAll (); System. out. println ("###########"); boolean flag2 = cart. modifyProduct (p3.getProductId (), 2); if (flag2) {System. out. println ("the product number is:" + p3.getProductId () + "is successfully modified! ");} Else {System. out. println ("failed to modify");} cart. showAll (); // cart. clearCart (); // cart. showAll (); System. out. println ("total price:" + cart. totalAllMoney ());}}

Run:

The above is all the content of this article. I hope it will be helpful for your learning and support for helping customers.