java 商品 系统 代码

package entity;

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public class Market {

private int id;//id

private int num;//数量

private String goods;//商品

private double price;//价格

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("您消费共计："+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("-------超市计价系统-------");

String goods1="可口可乐";

String goods2="爆米花";

String goods3="益达";

printTable("编号","商品","价格");

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("请输入商品的编号:");

int num = input.nextInt();

System.out.println("请输入商品的数量");

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");

}

}

//测试结果：

-------超市计价系统-------

编号 商品 价格

1 可口可乐 3.0￥

2 爆米花 5.0￥

3 益达 10.0￥

请输入商品的编号:

3

请输入商品的数量

5

您消费共计：50.0￥

求一个简易自动售货机的代码（java）要用创建类封装性，输出的时候要有提示语句，代码类似以下图片

//Example类文件Example.java

package cn.zhouhan;

import java.util.Scanner;

public class Example {

static Drink cola, fanta, blacktea, greentea;

static int money;

public static void main(String[] args) {

// TODO Auto-generated method stub

cola = new Drink("可乐", 50, 2.0, 1);

fanta = new Drink("芬达", 40, 3.0, 2);

blacktea = new Drink("红茶", 30, 4.0, 3);

greentea = new Drink("绿茶", 20, 5.0, 4);

money = 500;

for(;;)

{

System.out.println("-------------自动售货机-------------");

cola.UserPrintDrinkInfo();

fanta.UserPrintDrinkInfo();

blacktea.UserPrintDrinkInfo();

greentea.UserPrintDrinkInfo();

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

System.out.println("1.购买饮料");

System.out.println("2.管理员查询");

System.out.println("3.返回");

System.out.println("请输入要执行的操作序号：");

Scanner scannerIndex = new Scanner(System.in);

int indexScanner = scannerIndex.nextInt();

switch(indexScanner)

{

case 1:

System.out.println("请选择购买的饮料（1.可乐，2.芬达，3红茶，4.绿茶）：");

Scanner numberScanner = new Scanner(System.in);

int buyIndex = numberScanner.nextInt();

Drink drink = getDrink(buyIndex);

System.out.println("请输入购买的数量：");

Scanner countScanner = new Scanner(System.in);

int buyCount = countScanner.nextInt();

if (buyCount  0)

{

System.out.println("您选择了" + buyCount + "瓶" + drink.getName() + "." );

System.out.println("总价格：" + drink.getPrice() * buyCount + "元，请投入1元或5元纸币。");

System.out.println("确定购买？（1.确定，2.退款）：");

Scanner sureScanner = new Scanner(System.in);

int sure = sureScanner.nextInt();

if (sure == 1)

{

drink.sellDrink(buyCount);

money += drink.getPrice() * buyCount;

System.out.println("您购买了" + buyCount + "瓶" + drink.getName() + "，交易成功." );

}

if (sure ==2 )

{

System.out.println("退款成功！");

}

}

else

System.out.println("输入的数量有误！");

break;

case 2:

System.out.println("请输入管理员密码：");

Scanner pwScanner = new Scanner(System.in);

int password = pwScanner.nextInt();

if (password == 123)

{

System.out.println("密码正确，目前的余额为：" + money + "元。");

}

else

System.out.println("密码错误。");

break;

case 3:

break;

default:

System.out.println("请输入正确的数字。");

break;

}

}

}

public static Drink getDrink(int drinkIndex)

{

Drink drink = null;

switch(drinkIndex)

{

case 1:

drink = cola;

System.out.println("您选择了可乐。");

break;

case 2:

drink = fanta;

System.out.println("您选择了芬达。"); 

break;

case 3:

drink = blacktea;

System.out.println("您选择了红茶。");

break;

case 4:

drink = greentea;

System.out.println("您选择了绿茶。");

break;

default:

//drink = null;

System.out.println("输入错误，请输入1~4的数字！");

}

return drink;

}

}

//创建的Drink类文件Drink.java

package cn.zhouhan;

public class Drink {

private String name;

private int number;

private double price;

private double drinkMoney;

private int index;

public Drink(String name, int number, double price, int index)

{

this.name = name;

this.number = number;

this.price = price;

this.drinkMoney = number * price;

this.index = index;

}

public String getName()

{

return this.name;

}

public int getNumber()

{

return this.number;

}

public double getPrice()

{

return this.price;

}

public void sellDrink(int count)

{

this.number -= count;

this.drinkMoney += this.price * count;

}

public void UserPrintDrinkInfo()

{

System.out.println("品名："+ this.name +"，单价：" + this.price + "元，剩余数量：" + this.number + "瓶。");

}

}

帮忙写下Java代码

你好，按照你的要求补充的代码如下

// 【代码1】 // 实现totalSalesByYear( )方法

public double totalSalesByYear() {

return 5000;

}

// 【代码2】 // 实现totalSalesByYear( )方法

public double totalSalesByYear() {

return 3000;

}

// 【代码3】 // 实现totalSalesByYear( )方法

public double totalSalesByYear() {

return 1000;

}

// 【代码4】 // 计算商店年销售额totalSales

for (ComputeTotalSales good : goods) {

totalSales += good.totalSalesByYear();

}

求简单实现网上商城功能的java代码

平时在线10k人大概是让你创建一个数据库连接池，大小设置10k。

下面是一个图书商城的数据库表部分，供你参考

set utf8

DROP TABLE IF EXISTS d_product;

CREATE TABLE d_product (//用来存放总商品，入图书种类

id int(12) NOT NULL auto_increment,

product_name varchar(100) NOT NULL,

description varchar(100) default NULL,

add_time bigint(20) default NULL,

fixed_price double NOT NULL,

dang_price double NOT NULL,

keywords varchar(200) default NULL,

has_deleted int(1) NOT NULL default '0',

product_pic varchar(200) default NULL,

PRIMARY KEY (id)

) ENGINE=InnoDB DEFAULT CHARSET=utf8;

INSERT INTO d_product VALUES (23,'上课睡觉的故事','上课睡觉的故事',1237873000234,200,180,'key',0,'15.jpg');

DROP TABLE IF EXISTS d_book;

CREATE TABLE d_book (//用来存放图书的具体内容

id int(12) NOT NULL,

author varchar(200) NOT NULL,

publishing varchar(200) NOT NULL,

publish_time bigint(20) NOT NULL,

word_number varchar(15) default NULL,

which_edtion varchar(15) default NULL,

total_page varchar(15) default NULL,

print_time int(20) default NULL,

print_number varchar(15) default NULL,

isbn varchar(25) default NULL,

author_summary text NOT NULL,

catalogue text NOT NULL,

PRIMARY KEY (id)

) ENGINE=InnoDB DEFAULT CHARSET=utf8;

INSERT INTO d_book VALUES (24,'阿斗,'地球出版社',1237873000234,'1万','1','100',1,NULL,'12345678','无描述,'好书！');

DROP TABLE IF EXISTS d_category;

CREATE TABLE d_category (//商城图书目录

id int(12) NOT NULL auto_increment,

turn int(10) NOT NULL,

en_name varchar(200) NOT NULL,

name varchar(200) NOT NULL,

description varchar(200),

parent_id int(10),

PRIMARY KEY (id)

) ENGINE=InnoDB DEFAULT CHARSET=utf8;

INSERT INTO d_category VALUES (1,1,'Book','图书',NULL,0);

DROP TABLE IF EXISTS d_category_product;

CREATE TABLE d_category_product (//这个是连接目录和书籍具体信息的表

id int(12) NOT NULL auto_increment,

product_id int(10) NOT NULL,

cat_id int(10) NOT NULL,

PRIMARY KEY (id)

) ENGINE=InnoDB DEFAULT CHARSET=utf8;

INSERT INTO d_category_product VALUES (72,24,1);

DROP TABLE IF EXISTS d_item;

CREATE TABLE d_item (//这个订单条目表

id int(12) NOT NULL auto_increment,

order_id int(10) NOT NULL,

product_id int(10) NOT NULL,

product_name varchar(100) NOT NULL,

dang_price double NOT NULL,

product_num int(10) NOT NULL,

amount double NOT NULL,

PRIMARY KEY (id)

)

DROP TABLE IF EXISTS d_order;

CREATE TABLE d_order (//订单表

id int(10) NOT NULL auto_increment,

user_id int(10) NOT NULL,

status int(10) NOT NULL,

order_time bigint(20) NOT NULL,

order_desc varchar(100) default NULL,

total_price double NOT NULL,

receive_name varchar(100) default NULL,

full_address varchar(200) default NULL,

postal_code varchar(8) default NULL,

mobile varchar(20) default NULL,

phone varchar(20) default NULL,

PRIMARY KEY (id)

) ENGINE=InnoDB;

DROP TABLE IF EXISTS d_receive_address;

CREATE TABLE d_receive_address (//收件人信息表

id int(12) NOT NULL auto_increment,

user_id int(11) NOT NULL,

receive_name varchar(20) NOT NULL,

full_address varchar(200) NOT NULL,

postal_code varchar(8) NOT NULL,

mobile varchar(15) default NULL,

phone varchar(20) default NULL,

PRIMARY KEY (id)

) ENGINE=InnoDB;

insert into d_receive_address values(1, 6,'Java','sun.cn','10000800','12345','67890');

insert into d_receive_address values(2, 6,'JavaJavaJava','ibm.cn','10000600','12345','67890');

DROP TABLE IF EXISTS d_user;

CREATE TABLE d_user (//用户表，用户信息

id int(12) NOT NULL auto_increment,

email varchar(50) NOT NULL,

nickname varchar(50) default NULL,

password varchar(50) NOT NULL,

user_integral int(12) NOT NULL default '0',

is_email_verify char(3),

email_verify_code varchar(50) default NULL,

last_login_time bigint default NULL,

last_login_ip varchar(15) default NULL,

PRIMARY KEY (id),

UNIQUE KEY email (email)

) ENGINE=InnoDB DEFAULT CHARSET=utf8;

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