java超市計價系統(tǒng)代碼

package?entity;

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public?class?Market?{

private?int?id;//id

private?int?num;//數(shù)量

private?String?goods;//商品

private?double?price;//價格

public?Market(int?id,?int?num,?String?goods,?double?price)?{

super();

this.id?=?id;

this.num?=?num;

this.goods?=?goods;

this.price?=?price;

}

public?int?getId()?{

return?id;

}

public?void?setId(int?id)?{

this.id?=?id;

}

public?int?getNum()?{

return?num;

}

public?void?setNum(int?num)?{

this.num?=?num;

}

public?String?getGoods()?{

return?goods;

}

public?void?setGoods(String?goods)?{

this.goods?=?goods;

}

public?double?getPrice()?{

return?price;

}

public?void?setPrice(double?price)?{

this.price?=?price;

}

public?double?calc(?){

double?sum=price*num;

System.out.println("您消費(fèi)共計："+sum+"￥");

return?sum;

}

}

package?test;

import?java.util.HashMap;

import?java.util.Map;

import?java.util.Scanner;

import?entity.Market;

public?class?Test?{

private?static?MapInteger,Market?goods=new?HashMapInteger,?Market();

public?static?void?main(String[]?args)?{

System.out.println("-------超市計價系統(tǒng)-------");

String?goods1="可口可樂";

String?goods2="爆米花";

String?goods3="益達(dá)";

printTable("編號","商品","價格");

printTable("1",goods1,"3.0￥");

printTable("2",goods2,"5.0￥");

printTable("3",goods3,"10.0￥");

goods.put(1,?new?Market(1,?1,?goods1,?3.0));

goods.put(2,?new?Market(2,?1,??goods2,?5.0));

goods.put(3,?new?Market(3,?1,?goods3,?10.0));

Scanner?input?=?new?Scanner(System.in);

System.out.println("請輸入商品的編號:");

int?num?=?input.nextInt();

System.out.println("請輸入商品的數(shù)量");

int?amount?=?input.nextInt();

Market?market?=?goods.get(num);

market.setNum(amount);

market.calc();

}

private?static?void?printTable(String?row1,String?row2,String?row3?)?{

System.out.print(row1);

int?times=12;

if?(row2!="商品")?{

times=5;

}

for?(int?i?=?0;?i??times;?i++)?{

System.out.print("?");

}

System.out.print(row2);

for?(int?i?=?0;?i??10;?i++)?{

System.out.print("?");

}

System.out.print(row3);

System.out.println("\n");

}

}

//測試結(jié)果：

-------超市計價系統(tǒng)-------

編號????????????商品??????????價格

1?????可口可樂??????????3.0￥

2?????爆米花??????????5.0￥

3?????益達(dá)??????????10.0￥

請輸入商品的編號:

3

請輸入商品的數(shù)量

5

您消費(fèi)共計：50.0￥

購物車的Java代碼

import java.util.ArrayList;

import java.util.HashMap;

import java.util.Iterator;public class ShoppingCartManager {

HashMapString, String hm=new HashMapString, String();

float totlePrice=0;

//添加book到購物車

public void addBook(String bookId,String bookQuantity){

if(hm.containsKey(bookId)){

int value=Integer.parseInt(hm.get(bookId));

value+=Integer.parseInt(bookQuantity);

hm.put(bookId, value+"");

}else{

hm.put(bookId, bookQuantity);

}

}

//修改數(shù)量

public void updateQuantity(String bookId,String bookQuantity){

hm.put(bookId, bookQuantity);

}

//獲取購物車的所有信息 并計算總價

public ArrayListBookBean getShoppingCart(){

ArrayListBookBean al=new ArrayListBookBean();

IteratorString i=hm.keySet().iterator();

String ids="";

BookTableManager btm=new BookTableManager();

while(i.hasNext()){

ids=ids+","+i.next();

}

al= btm.selectByBookIds(ids);

totlePrice=0; //清空總價，防止無限累計

for(int j=0;jal.size();j++){

BookBean bb=al.get(j);

totlePrice+=bb.getPrice()*Integer.parseInt(getQuantityById(bb.getBookId()+""));

}

return al;

}

//獲取總價

public float getTotlePrice(){

return totlePrice;

}

//根據(jù)ID獲取數(shù)量

public String getQuantityById(String id){

String quantity=hm.get(id);

return quantity;

}

//清空購物車

public void clear(){

hm.clear();

}

//刪除購物車中的一本書

public void deleteById(String id){

hm.remove(id);

}

}

java編寫程序?qū)崿F(xiàn)某超市商品查價功能。從鍵盤輸入商品號，顯示對應(yīng)的商品價格，以“n”結(jié)束查詢。

package?sum;

import?java.util.ArrayList;

import?java.util.Scanner;

public?class?TestDemo?{

public?static?void?main(String[]?args){

ArrayListGoods?arr?=?new?ArrayListGoods();

Goods?g1?=?new?Goods(1,?"羽毛球",?237);

Goods?g2?=?new?Goods(2,?"羽毛球拍",?113);

Goods?g3?=?new?Goods(3,?"護(hù)腕",?100);

arr.add(g1);

arr.add(g2);

arr.add(g3);

System.out.println("***********************商品查詢系統(tǒng)*********************");

System.out.println("1.羽毛球???2.羽毛球拍??3.護(hù)腕");

System.out.println("*****************************************************");

Scanner?sc?=?new?Scanner(System.in);

outer:?while(true){

System.out.print("請選擇商品號:");

String?num?=?sc.next();

for(int?i?=?0;?i??arr.size();?i++){

if((arr.get(i).getId()?+?"").equals(num)){

System.out.println(arr.get(i).getName()?+?"?"?+?arr.get(i).getPrice()?+?"元"?);

}else?if(num.equals("n")){

System.out.println("謝謝使用");

break?outer;

}

}

}

}

}

class?Goods{

public?Goods(int?id,?String?name,?int?price){

this.id?=?id;

this.name?=?name;

this.price?=?price;

}

private?int?id;

private?String?name;

private?int?price;

public?int?getId()?{

return?id;

}

public?void?setId(int?id)?{

this.id?=?id;

}

public?String?getName()?{

return?name;

}

public?void?setName(String?name)?{

this.name?=?name;

}

public?int?getPrice()?{

return?price;

}

public?void?setPrice(int?price)?{

this.price?=?price;

}

}

很辛苦寫的希望能采納

Java項(xiàng)目實(shí)訓(xùn)模擬網(wǎng)上超市購物結(jié)算功能

使用結(jié)構(gòu)體+數(shù)組，就可以 了

~

~

~

~

~~~~~~~~~~~~~~~~~~~~~~~~~

Java初學(xué)者，哪位友友能幫我設(shè)計一個簡單的類似超市購物車的程序，參考一下~謝謝！

以前學(xué)習(xí)java又做個實(shí)例，挺值得學(xué)習(xí)的。

1.首先我先列出我們所需要的java類結(jié)構(gòu)。

1）Database.java --------- 模擬存儲商品的數(shù)據(jù)庫。

2）McBean.java ------------ 商品實(shí)體類，一個普通的javabean，里面有商品的基本屬性。

3）OrderItemBean.java --- 訂單表。

4）ShoppingCar.java ------ 這個就是最主要的購物車，當(dāng)然比較簡單。

5）TestShoppingCar.java --- 這個是測試類。

2.下面貼出具體代碼并帶關(guān)鍵注釋。

---Database.java

public class Database {

/*采用Map存儲商品數(shù)據(jù)，為什么呢？我覺得這個問題你自己需要想下。

* Integer 為Map的key值，McBean為Map的value值。

*/

private static MapInteger, McBean data = new HashMapInteger, McBean();

public Database() {

McBean bean = new McBean();

bean.setId(1);

bean.setName("地瓜");

bean.setPrice(2.0);

bean.setInstuction("新鮮的地瓜");

data.put(1, bean);//把商品放入Map

bean = new McBean();

bean.setId(2);

bean.setName("土豆");

bean.setPrice(1.2);

bean.setInstuction("又好又大的土豆");

data.put(2, bean);//把商品放入Map

bean = new McBean();

bean.setId(3);

bean.setName("絲瓜");

bean.setPrice(1.5);

bean.setInstuction("本地絲瓜");

data.put(3, bean);//把商品放入Map

}

public void setMcBean(McBean mcBean){

data.put(mcBean.getId(),mcBean);

}

public McBean getMcBean(int nid) {

return data.get(nid);

}

}

---McBean.java

public class McBean {

private int id;//商品編號

private String name;//商品名

private double price;//商品價格

private String instuction;//商品說明

public int getId() {

return id;

}

public void setId(int id) {

this.id = id;

}

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 String getInstuction() {

return instuction;

}

public void setInstuction(String instuction) {

this.instuction = instuction;

}

}

---ShoppingCar.java

public class ShoppingCar {

private double totalPrice; // 購物車所有商品總價格

private int totalCount; // 購物車所有商品數(shù)量

private MapInteger, OrderItemBean itemMap; // 商品編號與訂單項(xiàng)的鍵值對

public ShoppingCar() {

itemMap = new HashMapInteger, OrderItemBean();

}

public void buy(int nid) {

OrderItemBean order = itemMap.get(nid);

McBean mb;

if (order == null) {

mb = new Database().getMcBean(nid);

order = new OrderItemBean(mb, 1);

itemMap.put(nid, order);

update(nid, 1);

} else {

order.setCount(order.getCount() + 1);

update(nid, 1);

}

}

public void delete(int nid) {

OrderItemBean delorder = itemMap.remove(nid);

totalCount = totalCount - delorder.getCount();

totalPrice = totalPrice - delorder.getThing().getPrice() * delorder.getCount();

}

public void update(int nid, int count) {

OrderItemBean updorder = itemMap.get(nid);

totalCount = totalCount + count;

totalPrice = totalPrice + updorder.getThing().getPrice() * count;

}

public void clear() {

itemMap.clear();

totalCount = 0;

totalPrice = 0.0;

}

public void show() {

DecimalFormat df = new DecimalFormat("¤#.##");

System.out.println("商品編號\t商品名稱\t單價\t購買數(shù)量\t總價");

Set set = itemMap.keySet();

Iterator it = set.iterator();

while (it.hasNext()) {

OrderItemBean order = itemMap.get(it.next());

System.out.println(order.getThing().getId() + "\t"

+ order.getThing().getName() + "\t"

+ df.format(order.getThing().getPrice()) + "\t" + order.getCount()

+ "\t" + df.format(order.getCount() * order.getThing().getPrice()));

}

System.out.println("合計: 總數(shù)量: " + df.format(totalCount) + " 總價格: " + df.format(totalPrice));

System.out.println("**********************************************");

}

}

---OrderItemBean.java

public class OrderItemBean {

private McBean thing;//商品的實(shí)體

private int count;//商品的數(shù)量

public OrderItemBean(McBean thing, int count) {

super();

this.thing = thing;

this.count = count;

}

public McBean getThing() {

return thing;

}

public void setThing(McBean thing) {

this.thing = thing;

}

public int getCount() {

return count;

}

public void setCount(int count) {

this.count = count;

}

}

---TestShoppingCar.java

package com.shop;

public class TestShoppingCar {

public static void main(String[] args) {

ShoppingCar s = new ShoppingCar();

s.buy(1);//購買商品編號1的商品

s.buy(1);

s.buy(2);

s.buy(3);

s.buy(1);

s.show();//顯示購物車的信息

s.delete(1);//刪除商品編號為1的商品

s.show();

s.clear();

s.show();

}

}

3.打印輸出結(jié)果

商品編號 商品名稱 單價 購買數(shù)量 總價

1 地瓜 ￥2 3 ￥6

2 土豆 ￥1.2 1 ￥1.2

3 絲瓜 ￥1.5 1 ￥1.5

合計: 總數(shù)量: ￥5 總價格: ￥8.7

**********************************************

商品編號 商品名稱 單價 購買數(shù)量 總價

2 土豆 ￥1.2 1 ￥1.2

3 絲瓜 ￥1.5 1 ￥1.5

合計: 總數(shù)量: ￥2 總價格: ￥2.7

**********************************************

商品編號 商品名稱 單價 購買數(shù)量 總價

合計: 總數(shù)量: ￥0 總價格: ￥0

**********************************************

4.打字太累了，比較匆忙，但是主要靠你自己領(lǐng)會。哪里不清楚再提出來。

用java編程實(shí)現(xiàn)網(wǎng)上超市購物結(jié)算功能代碼

哎，我還是自己代碼黏貼給你吧！免得總通不過！裝不下這么多字，詳情自己找我。 連接數(shù)據(jù)庫類（添加修改會員信息） package com.to.java; import java.util.Scanner; import java.sql.*; public class Vds { Scanner Input=new Scanner(System.in); ZhuCK1 zhuck1=new ZhuCK1(); public void x(){ try{ Connection con=null; Statement stmt=null; ResultSet rs=null; Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); String ur1="jdbc:odbc:gg"; con=DriverManager.getConnection(ur1); stmt=con.createStatement(); String sqlstmt="select id,mm from gg"; rs=stmt.executeQuery(sqlstmt); System.out.println("----------查詢結(jié)果---------"); System.out.println(); System.out.println("會員號--密碼"); while(rs.next()){ String id=rs.getString("id"); String mm=rs.getString("mm"); System.out.println(id+" "+mm); } con.close(); stmt.close(); }catch(Exception e){ System.out.println(e);} System.out.println("是否返回上級菜單"); System.out.println("1.是"); System.out.println("2.否"); int m=Input.nextInt(); switch(m){ case 1: zhuck1.ZhucK1(); break; case 2: { System.out.println("歡迎下次再次使用");System.exit(-1);}; break; }} public void j(){ try{ Connection con=null; Statement stmt=null; ResultSet rs=null; Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); String ur1="jdbc:odbc:gg"; con=DriverManager.getConnection(ur1); stmt=con.createStatement(); String sqlstmt="select id,mm from gg"; rs=stmt.executeQuery(sqlstmt); while(rs.next()){ String id=rs.getString("id"); String mm=rs.getString("mm"); System.out.println(id+" "+mm); } Scanner input=new Scanner(System.in); System.out.println("請輸入會員信息："); System.out.println("請輸入會員號："); String f=input.next(); System.out.println("請輸入密碼："); String q=input.next(); String sqlst="insert into gg values('"+f+"','"+q+"')"; Statement tatement=con.createStatement(); int result=tatement.executeUpdate(sqlst); System.out.println("操作成功！"); con.close(); stmt.close(); }catch(Exception e){ System.out.println(e); } System.out.println("是否返回上級菜單"); System.out.println("1.是"); System.out.println("2.否"); int m=Input.nextInt(); switch(m){ case 1: zhuck1.ZhucK1(); break; case 2: { System.out.println("歡迎下次再次使用");System.exit(-1);}; break; } } public void xg(){ try{ Connection con=null; Statement stmt=null; ResultSet rs=null; Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); String ur1="jdbc:odbc:gg"; con=DriverManager.getConnection(ur1); stmt=con.createStatement(); String sqlstmt="select id,mm from gg"; rs=stmt.executeQuery(sqlstmt); while(rs.next()){ String id=rs.getString("id"); String mm=rs.getString("mm"); System.out.println(id+" "+mm); } Scanner input=new Scanner(System.in); System.out.println("請輸入會員信息："); System.out.println("請輸入要修改的會員號："); String f=input.next(); System.out.println("請輸入修改的密碼："); String q=input.next(); String sqlst="update gg set mm='"+q+"' where id='"+f+"'"; Statement tatement=con.createStatement(); int result=tatement.executeUpdate(sqlst); System.out.println("操作成功！"); con.close(); stmt.close(); }catch(Exception e){ System.out.println(e); } System.out.println("是否返回上級菜單"); System.out.println("1.是"); System.out.println("2.否"); int m=Input.nextInt(); switch(m){ case 1: zhuck1.ZhucK1(); break; case 2: { System.out.println("歡迎下次再次使用");System.exit(-1);}; break; } } } package com.to.java; import java.util.Scanner; public class KeHu { Vds sj=new Vds(); public void kehu1(){ Scanner Input=new Scanner(System.in); ZhuCK1 zhuck1=new ZhuCK1(); System.out.println("******************************************************"+"\n\n"); System.out.println("1.顯示所有客戶信息"); System.out.println("2.添加客戶信息"); System.out.println("3.修改客戶信息"); System.out.println("4.查詢客戶信息"); System.out.println("5.返回上級菜單"); System.out.println("******************************************************"+"\n\n"); System.out.println("請輸入數(shù)字："); int a=Input.nextInt(); switch(a){ case 1: sj.x(); break; case 2: sj.j(); break; case 3: sj.xg(); break; case 4: sj.x();break; case 5: zhuck1.ZhucK1();break; } } } package com.to.java; public class GouWuXiTong { public static void main(String[] args){ ZhuCK zhuck=new ZhuCK(); zhuck.ZhucK(); } } package com.to.java; import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.Statement; import java.util.Scanner; public class ZhuCK { Scanner Input=new Scanner(System.in); public void ZhucK(){ ZhuCK1 zhuck1=new ZhuCK1(); System.out.println("\t\t"+"歡迎使用我心我素購物系統(tǒng)"); System.out.println("******************************************************"+"\n\n"); System.out.println("\t\t"+"1.登陸系統(tǒng)"); System.out.println(); System.out.println("\t\t"+"2.退出"+"\n\n"); System.out.println("******************************************************"); int d=1; while(d!=2){ System.out.println("請輸入會員號："); String p=Input.next(); System.out.println("請輸入密碼："); String f=Input.next(); try{ Connection con=null; Statement stmt=null; ResultSet rs=null; Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); String ur1="jdbc:odbc:gg"; con=DriverManager.getConnection(ur1); stmt=con.createStatement(); String sqlstmt="select * from gg"; rs=stmt.executeQuery(sqlstmt); while(rs.next()){ String id=rs.getString("id"); String mm=rs.getString("mm"); if(id.equals(p)mm.equals(f)){ { System.out.println("請輸入數(shù)字："); int a=Input.nextInt(); switch(a){ case 1: zhuck1.ZhucK1(); break; case 2: break; }d=2; } } } }catch(Exception e){ System.out.println(e);} {System.out.println("輸入錯誤請再次輸入：");d=1;} } }} }

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