13518219792
import java.util.Scanner;
目前创新互联已为成百上千家的企业提供了网站建设、域名、雅安服务器托管、网站托管、服务器租用、企业网站设计、巫山网站维护等服务，公司将坚持客户导向、应用为本的策略，正道将秉承"和谐、参与、激情"的文化，与客户和合作伙伴齐心协力一起成长，共同发展。
//看这样的行吗？
public class StoreCharge {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("输入应付金额：");
double x = sc.nextDouble();
Price p1 = ampayable(x);
System.out.println(p1.toString());
System.out.println("输入实付金额：");
double y = sc.nextDouble();
Price p2 = ampaid(y);
System.out.println(p2.toString());
System.out.println("找零："+charge(p1,p2).toString());
charge(p1,p2);
}
public static Price charge(Price p1,Price p2){//p1总货价 p2收款
int c,b;
if(p2.connerp1.conner){
b = p2.conner+10-p1.conner;
p2.element = p2.element-1;
}else
b = p2.conner-p1.conner;
c = p2.element - p1.element;
return new Price(c,b);
}
public static Price ampayable(double x){//应付金额
Price a = new Price();
a.element = (int)x;
a.conner = (int)(x*10 -((int)x)*10);
return a;
}
public static Price ampaid(double x){//实付金额
Price a = new Price();
a.element = (int)x;
a.conner = (int)(x*10 -((int)x)*10);
return a;
}
}
class Price{
int element;//元
int conner;//角
public Price(){}
public Price(int e,int c){
element = e;
conner = c;
}
public String toString(){
return element+"元"+conner+"角";
}
}
刚帮你调测了一下，当你输入"n"的时候，已经跳出循环了，只不过你没有输出提示，以为没出来，
又输入字符了所有报错了，应该是输入金额的，我帮你加了下输出你可以看下结果；
public static void main(String args[]){
System.out.println("********************");
System.out.println("");
System.out.println("请选择购买商品编号：");
System.out.println("1.T恤(￥245.0) 网球鞋(￥570.0) 网球拍(￥500.0)");
System.out.println("********************");
System.out.println("");
double s=0;
String d;
do{
System.out.println("请输入商品编号：");
Scanner input=new Scanner(System.in);
int a=input.nextInt();
if(a==1){
System.out.println("请输入购买数量：");
int b=input.nextInt();
double c=245*b;
System.out.println("T恤￥245.0 数量:"+b+" "+"合计:"+c);
s=s+c;
}
else if(a==2){
System.out.println("请输入购买数量：");
int b=input.nextInt();
double c=570*b;
System.out.println("网球鞋￥245.0 数量:"+b+" "+"合计:"+c);
s=s+c;
}
else if(a==3){
System.out.println("请输入购买数量：");
int b=input.nextInt();
double c=500*b;
System.out.println("网球拍￥245.0 数量:"+b+" "+"合计:"+c);
s=s+c;
}
else {System.out.println("无此商品");}
System.out.println("否继续(y/n)");
d=input.next();
}while(d.equals("y"));
System.out.println("===========付款===========");
System.out.println("=====输入金额=====");
Scanner input=new Scanner(System.in);
int x=input.nextInt();
double m=s*0.8;
System.out.println("折扣：0.8");
System.out.println("应付金额："+m);
System.out.println("实际金额："+x);
double p=x-m;
System.out.println("找钱："+p);
}
算是最简单的吧
package cn.job01;
import java.util.Scanner;
public class Lx07 {
public static void choice() {
System.out.println("登陆菜单 ");
System.out.println("1登陆系统");
System.out.println("2退出");
}
static void choice1() {
System.out.println("购物管理系统客户信息");
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");
}
static void choice2() {
System.out.println("购物管理系统真情回馈");
System.out.println("1幸运大放送");
System.out.println("2幸运抽奖");
System.out.println("3生日问候");
}
public static void main(String[] args) {
choice();
Scanner input = new Scanner(System.in);
System.out.println("请输入1or2");
int num = input.nextInt();
switch (num) {
case 1:
System.out.println("主菜单");
System.out.println("1客户信息管理");
System.out.println("2购物结算");
System.out.println("3真情回馈");
System.out.println("4注销");
break;
}
System.out.println("选择输入数字");
int num1 = input.nextInt();
switch (num1) {
case 1:
choice1();
break;
case 2:
System.out.println("购物结算");
break;
case 3:
choice2();
break;
case 4:
choice();
break;
}
}
}
结算联系到好几个文件哦。上上个星期我们刚把网上购物车系统做完。下面是Servlet里的一段，希望对你有用！
else if (command.equalsIgnoreCase("modifybookcount")) {
int bookCartID = (Integer) session.getAttribute("bookcartID");
int operBookID = Integer.valueOf((String) request
.getParameter("operBookID"));
// 获得购物车中原有数量
int bookCount = Integer.valueOf((String) request
.getParameter("bookCount"));
// 获得需要会员修改的数量
int operBookCount = Integer.valueOf((String) request
.getParameter("operBookCount"));
// 得到图书数量增量
int bookCountIncrement = operBookCount - bookCount;
// 得到图书价格的增量
double bookPriceIncrement = bookCountIncrement
* Double.valueOf((String) request.getParameter("disPrice"));
CartListDAO cartlist = new CartListDAO();
// 更新购物车中图书的总数量和总价格
cartlist
.updateBookCount(bookCartID, operBookID, bookCountIncrement);
BookCartDAO bookcart = (BookCartDAO) session
.getAttribute("bookcart");
bookcart.updateCartData(bookCartID, bookPriceIncrement,
bookCountIncrement);
targetPage = "/cartlist.jsp";
RequestDispatcher dispatcher = request
.getRequestDispatcher(targetPage);
dispatcher.forward(request, response);
}
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;} } }} }
