java交易代码 java程序化交易

急求java购物车代码

package bean;

import java.util.ArrayList;

import java.util.List;

/**

*

* @author Administrator

* 购物车类：

* 为了方便将商品信息绑订到session上面而设计的一个

* 工具，提供了商品的添加，删除，列表，计价，清空，

* 修改功能。

*/

public class Cart {

//items属性：用来保存商品

private ListCartItem items =

new ArrayListCartItem();

/**

* 将商品添加到购物车

*/

public boolean add(CartItem item){

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

CartItem curr = items.get(i);

if(curr.getC().getId() == item.getC().getId()){

//该商品已经购买过

return false;

}

}

//没有购买过，则添加该商品

items.add(item);

return true;

}

/**

* 从购物车当中删除某件商品

*/

public void delete(int id){

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

CartItem curr = items.get(i);

if(curr.getC().getId() == id){

items.remove(curr);

return;

}

}

}

/**

* 获得购物车中所有商品信息

*/

public ListCartItem list(){

return items;

}

/**

* 商品总价

*/

public double cost(){

double total = 0;

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

CartItem curr = items.get(i);

total += curr.getC().getPrice() * curr.getQty();

}

return total;

}

/**

* 清空购物车中的所有商品

*/

public void clear(){

items.clear();

}

/**

* 修改购物车中某种商品的数量

*/

public void modify(int id,int qty){

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

CartItem curr = items.get(i);

if(curr.getC().getId() == id){

curr.setQty(qty);

return;

}

}

}

}

相关问答

Q1: 用java编程实现网上超市购物结算功能代码

哎，我还是自己代码黏贴给你吧！免得总通不过！装不下这么多字，详情自己找我。 连接数据库类（添加修改会员信息） 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("----------查询结果---------"); System.out.println(); System.out.println("会员号--密码"); 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("是否返回上级菜单"); 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("欢迎下次再次使用");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("请输入会员信息："); System.out.println("请输入会员号："); String f=input.next(); System.out.println("请输入密码："); 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("是否返回上级菜单"); 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("欢迎下次再次使用");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("请输入会员信息："); System.out.println("请输入要修改的会员号："); String f=input.next(); System.out.println("请输入修改的密码："); 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("是否返回上级菜单"); 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("欢迎下次再次使用");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.显示所有客户信息"); System.out.println("2.添加客户信息"); System.out.println("3.修改客户信息"); System.out.println("4.查询客户信息"); System.out.println("5.返回上级菜单"); System.out.println("******************************************************"+"\n\n"); System.out.println("请输入数字："); 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"+"欢迎使用我心我素购物系统"); System.out.println("******************************************************"+"\n\n"); System.out.println("\t\t"+"1.登陆系统"); 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("请输入会员号："); String p=Input.next(); System.out.println("请输入密码："); 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("请输入数字："); 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("输入错误请再次输入：");d=1;} } }} }

Q2: 能不能也给我一段JAVA在线支付的代码？

import com.capinfo.crypt.*;

public class RsaTest

{

public RsaTest(){

}

public static void main(String[] args){

//首信公钥文件

String publicKey = "d:/Public1024.key";

//签名信息

String SignString = "3e5671bc4f91c3d055b18c1e5e22dd9db157380c7ee8facf0b1117082fbf398d7113c2df7e3219fc28dd88dd26cb096cabe607f3e397dfc2dcdb3349351a5f025ea0761da6e39e2d2fd311294a6076e777fe2ab8911f22113c435b89d63ae4f2aff2f333f7ebd40cc89601d58fb37b16596b5c94eb8b64cd52e12b9679248e6a";

//原信息

String strSource = "abcde12345";

try{

//公钥验证

RSA_MD5 rsaMD5 = new RSA_MD5();

int k = rsaMD5.PublicVerifyMD5(publicKey,SignString,strSource);

if(k==0)

System.out.println("验证成功.");

else

System.out.println("验证失败.");

}catch(Exception e){

System.out.println("验证异常.\n"+e);

}

}

}

Q3: 购物车的Java代码

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到购物车

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);

}

}

//修改数量

public void updateQuantity(String bookId,String bookQuantity){

hm.put(bookId, bookQuantity);

}

//获取购物车的所有信息 并计算总价

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; //清空总价，防止无限累计

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

BookBean bb=al.get(j);

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

}

return al;

}

//获取总价

public float getTotlePrice(){

return totlePrice;

}

//根据ID获取数量

public String getQuantityById(String id){

String quantity=hm.get(id);

return quantity;

}

//清空购物车

public void clear(){

hm.clear();

}

//删除购物车中的一本书

public void deleteById(String id){

hm.remove(id);

}

}

Q4: java atm机代码

package arraylist;

import java.util.Scanner;

public class AtmDemo

{

public static void main(String[] args)

{

// TODO Auto-generated method stub

Scanner sc = new Scanner(System.in);

Boolean flag = true;

int times = 0;

while(flag){

times++;

if(times == 4){

System.out.println("密码错误java交易代码，请取卡");

break;

}

System.out.println("请输入java交易代码你java交易代码的密码");

String password = sc.next();

if(password.equals("111111")){

Boolean moneyflag = true;

while(moneyflag){

System.out.println("请输入金额");

int number = sc.nextInt();

if(number = 0 number = 1000 number % 100 == 0){

System.out.println("用户取java交易代码了" + number + "元。交易完成");

moneyflag = false;

}else{

System.out.println("请重新输入金额");

}

}

break;

}else{

continue;

}

}

}

}

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