Java实现购物管理系统

Java实现购物管理系统

本文实例为大家分享了java实现购物管理系统的具体代码，供大家参考，具体内容如下

重点内容

JAVA分支结构练习

动态数组

注册表读写删

代码：

package Endless;

import java.util.ArrayList;

import java.util.Random;

/**

* @JAVA01.person1.java

* @version 创建时间：2017年7月26日 下午6:29:16

* //实现商品及会员信息管理(添加，删除，显示)

* //实现超市结算

*/

import java.util.Scanner;

import java.util.prefs.BackingStoreException;

import java.util.prefs.Preferences;

public class persion {

static int s;

static boolean huiyuan,xhuiyuan;

static String bke="百事可乐",ke="500ml可乐一瓶",m="5公斤面粉",ss="1个苏泊尔炒菜锅",o="欧莱雅爽肤水一瓶";

static ArrayListarray=new ArrayList();

static Preferences goodsnodes = Preferences.systemRoot().node("goods"); //创建节点

static Preferences goodschildnode = goodsnodes.node( "goods"); //创建子节点

public static void main(String []args) {

outline();

System.out.println("\t欢迎使用购物管理系统");

System.out.println("\t1.登陆系统\n\t2.退出程序\n ");

outline();

int n =scanint();

if(n == 1){

login();

}else if( n== 2){

System.out.println("已退出");

System.exit(0);

}else {

System.out.println("请重新选择：");

main(null);

}

}

public static void outline(){

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

}

public static int scanint(){

int x = 0;

try {

Scanner scan =new Scanner(System.http://in);

x = scan.nextInt();

} catch (Exception e) {

System.out.println("输入有误,请输入数字：");

}

return x;

}

public static String scanStr(){

String x = null;

try {

Scanner scan =new Scanner(System.in);

x = scan.next();

} catch (Exception e) {

System.out.println("输入有误,请输入字符串：");

}

return x;

}

public static void login(){

System.out.println(" * * * * * * * * * 登陆 * * * * * * * * * * * *\n请输入密码\n：");

int n1 =scanint();

if(n1==(123123)){

System.out.println("登陆成功\n");

showMain();

}else{

System.out.println("密码错误");

System.out.println("请重新输入密码\n：");

login();

}

}

private static void showMain() {

System.out.println("\n\n\t欢迎使用购物管理系统\n");

outline();

System.out.println("\t\t 1. 会 员 信 息 管 理\n");

System.out.println("\t\t 2. 货 物 信 息 管 理\n");

System.out.println("\t\t 3. 购 物 结 算\n");

System.out.println("\t\t 4. 注 销\n");

outline();

System.out.print("请选择,输入数字:");

int n2 =scanint();

switch (n2) {

case 1:

new user();

break;

case 2:

goods();

break;

case 3:

jiesuan();

break;

case 4:

System.out.println("注销成功");

main(null);

default:

System.out.println("没有您要的选项请重新输入");

showMain();

break;

}

}

private static void goods() {

//商品管理 ：添加商品： 编号 品名 价格

// 删除：选择标号删除

outline();

System.out.println("\t\t商品信息管理\n");

System.out.println("\t\t1,显示商品\n");

System.out.println("\t\t2,添加物品\n");

System.out.println("\t\t3,删除商品\n");

System.out.println("\t\t4,返回上级\n");

outline();

int n = scanint();

if (n==1){

showgoods();

}else if(n==2){

addgoods();

}else if(n ==3){

delgoods();

}else if(n==4) {

showMain();

}else {

goods();

}

}

private static void delgoods() {

System.out.println("请选择要删除商品的ID：\n按0返回上级");

try {

Scanner scan =new Scanner(System.in);

int x = scan.nextInt();

boolean remove=false;

for (int i=0;i

if(x==Integer.parseInt(array.get(i))){

remove=true;

}

}

if (remove){

goodschildnode.remove(Integer.toString(x));

System.out.println("删除成功");

goods();

}else if (x==0) {

goods();

}else {

System.out.println("没有此商品！");

delgoods();

}

new user();

} catch (Exception e) {

System.out.println("请输入数字");

delgoods();

}

}

private static void showgoods() {

try {

int leng =goodschildnode.keys().length;

syncread();

if(leng==0){

System.out.println("没有商品");

}else{

try {

System.out.println("当前有"+goodschildnode.keys().length+"种商品");

for(int i = 0;i<=goodschildnode.keys().length;i++){

String shows =goodschildnode.get(array.get(i), "");

System.out.println(shows);

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

}

System.out.println("00000000");

} catch (Exception e) {

}

}

} catch (BackingStoreException e) {

}

System.out.println("111111111");

goods();

}

private static void syncread() {

try {

String[] arr= goodschildnode.keys();

goodschildnode.sync();

array.clear();

for(int i=0;i

array.add(arr[i]);

}

} catch (Exception e) {

}

}

private static int check(int x) {

Random n=new Random();

syncread();

for(int i=0;i

if(x==Integer.parseInt(array.get(i))){

check(n.nextInt(999)+1);

}

}

return x;

}

private static void addgoods(){

outline();

System.out.println("\t\t请输入商品信息");

System.out.println("\t\t品名,价格(元),单位");

System.out.println("\t\t回车换行区分");

outline();

syncread();

String name =scanStr();

String nuit =scanStr();

int price = scanint();

Random n=new Random();

String id ;

id=Integer.toString(check(n.nextInt(999)+1));

try{

goodschildnode.put(id, "ID:"+id+" 品名："+name+" 价格："+price+" 单位："+nuit);

syncread();

System.out.println("第"+(goodschildnode.keys().length)+"种商品添加成功");

System.out.println("当前商品"+goodschildnode.keys().length+"种\n"+array+"\n"+array.size());

goods();

} catch (Exception e) {

goods();

}

}

static void jiesuan(){

try{

System.out.println("是否会员？是选1 否选0");

int x= scanint();

if (x==1){

huiyuan = true;

Scanner sc =new Scanner(System.in);

System.out.println("请输入您的会员号：");

int hui = sc.nextInt()/100%10;

if(hui==9){

System.out.println("恭喜你属于幸运会员,可以享受全场八折优惠");

xhuiyuan = true;

}else{

xhuiyuan = false;

}

}else if (x==0) {

huiyuan = false;

}

System.out.println("请输入消费金额:");

Scanner scan =new Scanner(System.in);

if(scan.hasNext()){

s=scan.nextInt();

outline();

System.out.println("是否参加优惠换购活动：" );

System.out.println("1:满50元，加2元换购"+bke );

System.out.println("2:满100元，加3元换购" +ke);

System.out.println("3:满100元，加10元换购" +m );

System.out.println("4:满200元，加10元换购" +ss );

System.out.println("5:满200元，加20元换购 " +o );

System.out.println("0：不换购\n请选择：\n" );

http:// outline();

os();

}

} catch (Exception e) {

System.out.println("请输入数字");

jiesuan();

}

}

static void out(String n , double s){

if(!(n==null)){

System.out.println("成功换购"+n);

}

System.out.println("本次消费总金额："+s+"元");

if (huiyuan && xhuiyuan){

System.out.println("尊敬的幸运会员，本次消费享受8折优惠");

double x =s*0.8;

System.out.println("折扣为您节省："+(s-x)+"元");

}else if (huiyuan) {

System.out.println("尊敬的会员，本次消费享受9折优惠");

double x =s*0.9;

System.out.println("折扣为您节省："+(s-x)+"元");

}

System.out.println("实际消费总金额："+s+"元");

showMain();

}

static void os(){

switch (scanint()) {

case 0:

out(null,s);

case 1:

if(s>=52){

out(bke,s+2);

}else{

Err();

}

case 2:

if(s>=103){

out(ke,s+3);

}else{

Err();

}

break;

case 3:

if(s>=110){

out(m,s+10);

}else{

Err();

}

break;

case 4:

if(s>=210){

out(ss,s+10);

}else{

Err();

}

break;

case 5:

if(s>=220){

out(o,s+20);

}else{

Err();

}

break;

default:

System.out.println("请重新选择");

os();

}

}

static void Err(){

System.out.println("金额不足\n");

main(null);

}

static class user{

static ArrayListarray=new ArrayList<>();

static Preferences nodes = Preferences.systemRoot().node("user"); //创建节点

static Preferences childnode = nodes.node( "user"); //创建子节点

public user() {

outline();

System.out.println("\t\t1,添加用户");

System.out.println("\t\t2,删除用户");

System.out.println("\t\t3,显示用户");

System.out.println("\t\t4,返回上级");

outline();

try {

int x=scanint();

switch (x) {

case 1:

add();

break;

case 2:

deluser();

break;

case 3:

show();

break;

case 4:

showMain();

break;

default:

System.out.println("没有您要的选项！请重新RxiZVwF选择");

new user();

break;

}

} catch (Exception e) {

new user();

}

}

private void deluser() throws BackingStoreException {

System.out.println("请选择要删除用户的ID：\n按0返回上级");

try {

Scanner scan =new Scanner(System.in);

int x = scan.nextInt();

boolean remove=false;

for (int i=0;i

if(x==Integer.parseInt(array.get(i))){

remove=true;

}

}

if (remove){

childnode.remove(Integer.toString(x));

System.out.println("删除成功");

}else if (x==0) {

new user();

}else {

System.out.println("没有此用户！");

deluser();

}

new user();

} catch (Exception e) {

System.out.println("请输入数字");

deluser();

}

}

private static void show() {

try {

int leng =childnode.keys().length;

syncread();

if(leng==0){

System.out.println("没有用户");

}else{

System.out.println("当前有"+childnode.keys().length+"位用户");

for(int i = 0;i<=childnode.keys().length;i++){

String shows =childnode.get(childnode.keys()[i], "");

System.out.println(shows);

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

}

}

} catch (BackingStoreException e) {

}

new user();

}

private static void syncread() {

try {

String[] arr= childnode.keys();

childnode.sync();

array.clear();

for(int i=0;i

array.add(arr[i]);

}

} catch (Exception e) {

}

}

private static void add(){

Preferences nodes = Preferences.systemRoot().node("user"); //创建节点

Preferences childnode = nodes.node( "user"); //创建子节点

outline();

System.out.println("\t\t请输入用户信息");

System.out.println("\t\t姓名,6位卡号,年龄,电话");

System.out.println("\t\t回车换行区分");

outline();

syncread();

String name =scanStr();

int card = scanint();

int age =scanint();

String tel =scanStr();

Random n=new Random();

String id ;

id = Integer.toString(n.nextInt(999)+1);

try{

childnode.put(id, "ID:"+id+" 姓名："+name+" 卡号："+card+" 年龄："+age+" 电话："+tel);

syncread();

System.out.println("第"+(childnode.keys().length)+"位会员添加成功");

System.out.println("当前用户"+childnode.keys().length+"位\n"+array+"\n"+array.size());

new user();

} catch (Exception e) {

new user();

}

}

}

}

更多学习资料请关注专题《管理系统开发》。

if(x==Integer.parseInt(array.get(i))){

remove=true;

}

}

if (remove){

goodschildnode.remove(Integer.toString(x));

System.out.println("删除成功");

goods();

}else if (x==0) {

goods();

}else {

System.out.println("没有此商品！");

delgoods();

}

new user();

} catch (Exception e) {

System.out.println("请输入数字");

delgoods();

}

}

private static void showgoods() {

try {

int leng =goodschildnode.keys().length;

syncread();

if(leng==0){

System.out.println("没有商品");

}else{

try {

System.out.println("当前有"+goodschildnode.keys().length+"种商品");

for(int i = 0;i<=goodschildnode.keys().length;i++){

String shows =goodschildnode.get(array.get(i), "");

System.out.println(shows);

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

}

System.out.println("00000000");

} catch (Exception e) {

}

}

} catch (BackingStoreException e) {

}

System.out.println("111111111");

goods();

}

private static void syncread() {

try {

String[] arr= goodschildnode.keys();

goodschildnode.sync();

array.clear();

for(int i=0;i

array.add(arr[i]);

}

} catch (Exception e) {

}

}

private static int check(int x) {

Random n=new Random();

syncread();

for(int i=0;i

if(x==Integer.parseInt(array.get(i))){

check(n.nextInt(999)+1);

}

}

return x;

}

private static void addgoods(){

outline();

System.out.println("\t\t请输入商品信息");

System.out.println("\t\t品名,价格(元),单位");

System.out.println("\t\t回车换行区分");

outline();

syncread();

String name =scanStr();

String nuit =scanStr();

int price = scanint();

Random n=new Random();

String id ;

id=Integer.toString(check(n.nextInt(999)+1));

try{

goodschildnode.put(id, "ID:"+id+" 品名："+name+" 价格："+price+" 单位："+nuit);

syncread();

System.out.println("第"+(goodschildnode.keys().length)+"种商品添加成功");

System.out.println("当前商品"+goodschildnode.keys().length+"种\n"+array+"\n"+array.size());

goods();

} catch (Exception e) {

goods();

}

}

static void jiesuan(){

try{

System.out.println("是否会员？是选1 否选0");

int x= scanint();

if (x==1){

huiyuan = true;

Scanner sc =new Scanner(System.in);

System.out.println("请输入您的会员号：");

int hui = sc.nextInt()/100%10;

if(hui==9){

System.out.println("恭喜你属于幸运会员,可以享受全场八折优惠");

xhuiyuan = true;

}else{

xhuiyuan = false;

}

}else if (x==0) {

huiyuan = false;

}

System.out.println("请输入消费金额:");

Scanner scan =new Scanner(System.in);

if(scan.hasNext()){

s=scan.nextInt();

outline();

System.out.println("是否参加优惠换购活动：" );

System.out.println("1:满50元，加2元换购"+bke );

System.out.println("2:满100元，加3元换购" +ke);

System.out.println("3:满100元，加10元换购" +m );

System.out.println("4:满200元，加10元换购" +ss );

System.out.println("5:满200元，加20元换购 " +o );

System.out.println("0：不换购\n请选择：\n" );

http:// outline();

os();

}

} catch (Exception e) {

System.out.println("请输入数字");

jiesuan();

}

}

static void out(String n , double s){

if(!(n==null)){

System.out.println("成功换购"+n);

}

System.out.println("本次消费总金额："+s+"元");

if (huiyuan && xhuiyuan){

System.out.println("尊敬的幸运会员，本次消费享受8折优惠");

double x =s*0.8;

System.out.println("折扣为您节省："+(s-x)+"元");

}else if (huiyuan) {

System.out.println("尊敬的会员，本次消费享受9折优惠");

double x =s*0.9;

System.out.println("折扣为您节省："+(s-x)+"元");

}

System.out.println("实际消费总金额："+s+"元");

showMain();

}

static void os(){

switch (scanint()) {

case 0:

out(null,s);

case 1:

if(s>=52){

out(bke,s+2);

}else{

Err();

}

case 2:

if(s>=103){

out(ke,s+3);

}else{

Err();

}

break;

case 3:

if(s>=110){

out(m,s+10);

}else{

Err();

}

break;

case 4:

if(s>=210){

out(ss,s+10);

}else{

Err();

}

break;

case 5:

if(s>=220){

out(o,s+20);

}else{

Err();

}

break;

default:

System.out.println("请重新选择");

os();

}

}

static void Err(){

System.out.println("金额不足\n");

main(null);

}

static class user{

static ArrayListarray=new ArrayList<>();

static Preferences nodes = Preferences.systemRoot().node("user"); //创建节点

static Preferences childnode = nodes.node( "user"); //创建子节点

public user() {

outline();

System.out.println("\t\t1,添加用户");

System.out.println("\t\t2,删除用户");

System.out.println("\t\t3,显示用户");

System.out.println("\t\t4,返回上级");

outline();

try {

int x=scanint();

switch (x) {

case 1:

add();

break;

case 2:

deluser();

break;

case 3:

show();

break;

case 4:

showMain();

break;

default:

System.out.println("没有您要的选项！请重新RxiZVwF选择");

new user();

break;

}

} catch (Exception e) {

new user();

}

}

private void deluser() throws BackingStoreException {

System.out.println("请选择要删除用户的ID：\n按0返回上级");

try {

Scanner scan =new Scanner(System.in);

int x = scan.nextInt();

boolean remove=false;

for (int i=0;i

if(x==Integer.parseInt(array.get(i))){

remove=true;

}

}

if (remove){

childnode.remove(Integer.toString(x));

System.out.println("删除成功");

}else if (x==0) {

new user();

}else {

System.out.println("没有此用户！");

deluser();

}

new user();

} catch (Exception e) {

System.out.println("请输入数字");

deluser();

}

}

private static void show() {

try {

int leng =childnode.keys().length;

syncread();

if(leng==0){

System.out.println("没有用户");

}else{

System.out.println("当前有"+childnode.keys().length+"位用户");

for(int i = 0;i<=childnode.keys().length;i++){

String shows =childnode.get(childnode.keys()[i], "");

System.out.println(shows);

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

}

}

} catch (BackingStoreException e) {

}

new user();

}

private static void syncread() {

try {

String[] arr= childnode.keys();

childnode.sync();

array.clear();

for(int i=0;i

array.add(arr[i]);

}

} catch (Exception e) {

}

}

private static void add(){

Preferences nodes = Preferences.systemRoot().node("user"); //创建节点

Preferences childnode = nodes.node( "user"); //创建子节点

outline();

System.out.println("\t\t请输入用户信息");

System.out.println("\t\t姓名,6位卡号,年龄,电话");

System.out.println("\t\t回车换行区分");

outline();

syncread();

String name =scanStr();

int card = scanint();

int age =scanint();

String tel =scanStr();

Random n=new Random();

String id ;

id = Integer.toString(n.nextInt(999)+1);

try{

childnode.put(id, "ID:"+id+" 姓名："+name+" 卡号："+card+" 年龄："+age+" 电话："+tel);

syncread();

System.out.println("第"+(childnode.keys().length)+"位会员添加成功");

System.out.println("当前用户"+childnode.keys().length+"位\n"+array+"\n"+array.size());

new user();

} catch (Exception e) {

new user();

}

}

}

}

更多学习资料请关注专题《管理系统开发》。

array.add(arr[i]);

}

} catch (Exception e) {

}

}

private static int check(int x) {

Random n=new Random();

syncread();

for(int i=0;i

if(x==Integer.parseInt(array.get(i))){

check(n.nextInt(999)+1);

}

}

return x;

}

private static void addgoods(){

outline();

System.out.println("\t\t请输入商品信息");

System.out.println("\t\t品名,价格(元),单位");

System.out.println("\t\t回车换行区分");

outline();

syncread();

String name =scanStr();

String nuit =scanStr();

int price = scanint();

Random n=new Random();

String id ;

id=Integer.toString(check(n.nextInt(999)+1));

try{

goodschildnode.put(id, "ID:"+id+" 品名："+name+" 价格："+price+" 单位："+nuit);

syncread();

System.out.println("第"+(goodschildnode.keys().length)+"种商品添加成功");

System.out.println("当前商品"+goodschildnode.keys().length+"种\n"+array+"\n"+array.size());

goods();

} catch (Exception e) {

goods();

}

}

static void jiesuan(){

try{

System.out.println("是否会员？是选1 否选0");

int x= scanint();

if (x==1){

huiyuan = true;

Scanner sc =new Scanner(System.in);

System.out.println("请输入您的会员号：");

int hui = sc.nextInt()/100%10;

if(hui==9){

System.out.println("恭喜你属于幸运会员,可以享受全场八折优惠");

xhuiyuan = true;

}else{

xhuiyuan = false;

}

}else if (x==0) {

huiyuan = false;

}

System.out.println("请输入消费金额:");

Scanner scan =new Scanner(System.in);

if(scan.hasNext()){

s=scan.nextInt();

outline();

System.out.println("是否参加优惠换购活动：" );

System.out.println("1:满50元，加2元换购"+bke );

System.out.println("2:满100元，加3元换购" +ke);

System.out.println("3:满100元，加10元换购" +m );

System.out.println("4:满200元，加10元换购" +ss );

System.out.println("5:满200元，加20元换购 " +o );

System.out.println("0：不换购\n请选择：\n" );

http:// outline();

os();

}

} catch (Exception e) {

System.out.println("请输入数字");

jiesuan();

}

}

static void out(String n , double s){

if(!(n==null)){

System.out.println("成功换购"+n);

}

System.out.println("本次消费总金额："+s+"元");

if (huiyuan && xhuiyuan){

System.out.println("尊敬的幸运会员，本次消费享受8折优惠");

double x =s*0.8;

System.out.println("折扣为您节省："+(s-x)+"元");

}else if (huiyuan) {

System.out.println("尊敬的会员，本次消费享受9折优惠");

double x =s*0.9;

System.out.println("折扣为您节省："+(s-x)+"元");

}

System.out.println("实际消费总金额："+s+"元");

showMain();

}

static void os(){

switch (scanint()) {

case 0:

out(null,s);

case 1:

if(s>=52){

out(bke,s+2);

}else{

Err();

}

case 2:

if(s>=103){

out(ke,s+3);

}else{

Err();

}

break;

case 3:

if(s>=110){

out(m,s+10);

}else{

Err();

}

break;

case 4:

if(s>=210){

out(ss,s+10);

}else{

Err();

}

break;

case 5:

if(s>=220){

out(o,s+20);

}else{

Err();

}

break;

default:

System.out.println("请重新选择");

os();

}

}

static void Err(){

System.out.println("金额不足\n");

main(null);

}

static class user{

static ArrayListarray=new ArrayList<>();

static Preferences nodes = Preferences.systemRoot().node("user"); //创建节点

static Preferences childnode = nodes.node( "user"); //创建子节点

public user() {

outline();

System.out.println("\t\t1,添加用户");

System.out.println("\t\t2,删除用户");

System.out.println("\t\t3,显示用户");

System.out.println("\t\t4,返回上级");

outline();

try {

int x=scanint();

switch (x) {

case 1:

add();

break;

case 2:

deluser();

break;

case 3:

show();

break;

case 4:

showMain();

break;

default:

System.out.println("没有您要的选项！请重新RxiZVwF选择");

new user();

break;

}

} catch (Exception e) {

new user();

}

}

private void deluser() throws BackingStoreException {

System.out.println("请选择要删除用户的ID：\n按0返回上级");

try {

Scanner scan =new Scanner(System.in);

int x = scan.nextInt();

boolean remove=false;

for (int i=0;i

if(x==Integer.parseInt(array.get(i))){

remove=true;

}

}

if (remove){

childnode.remove(Integer.toString(x));

System.out.println("删除成功");

}else if (x==0) {

new user();

}else {

System.out.println("没有此用户！");

deluser();

}

new user();

} catch (Exception e) {

System.out.println("请输入数字");

deluser();

}

}

private static void show() {

try {

int leng =childnode.keys().length;

syncread();

if(leng==0){

System.out.println("没有用户");

}else{

System.out.println("当前有"+childnode.keys().length+"位用户");

for(int i = 0;i<=childnode.keys().length;i++){

String shows =childnode.get(childnode.keys()[i], "");

System.out.println(shows);

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

}

}

} catch (BackingStoreException e) {

}

new user();

}

private static void syncread() {

try {

String[] arr= childnode.keys();

childnode.sync();

array.clear();

for(int i=0;i

array.add(arr[i]);

}

} catch (Exception e) {

}

}

private static void add(){

Preferences nodes = Preferences.systemRoot().node("user"); //创建节点

Preferences childnode = nodes.node( "user"); //创建子节点

outline();

System.out.println("\t\t请输入用户信息");

System.out.println("\t\t姓名,6位卡号,年龄,电话");

System.out.println("\t\t回车换行区分");

outline();

syncread();

String name =scanStr();

int card = scanint();

int age =scanint();

String tel =scanStr();

Random n=new Random();

String id ;

id = Integer.toString(n.nextInt(999)+1);

try{

childnode.put(id, "ID:"+id+" 姓名："+name+" 卡号："+card+" 年龄："+age+" 电话："+tel);

syncread();

System.out.println("第"+(childnode.keys().length)+"位会员添加成功");

System.out.println("当前用户"+childnode.keys().length+"位\n"+array+"\n"+array.size());

new user();

} catch (Exception e) {

new user();

}

}

}

}

更多学习资料请关注专题《管理系统开发》。

if(x==Integer.parseInt(array.get(i))){

check(n.nextInt(999)+1);

}

}

return x;

}

private static void addgoods(){

outline();

System.out.println("\t\t请输入商品信息");

System.out.println("\t\t品名,价格(元),单位");

System.out.println("\t\t回车换行区分");

outline();

syncread();

String name =scanStr();

String nuit =scanStr();

int price = scanint();

Random n=new Random();

String id ;

id=Integer.toString(check(n.nextInt(999)+1));

try{

goodschildnode.put(id, "ID:"+id+" 品名："+name+" 价格："+price+" 单位："+nuit);

syncread();

System.out.println("第"+(goodschildnode.keys().length)+"种商品添加成功");

System.out.println("当前商品"+goodschildnode.keys().length+"种\n"+array+"\n"+array.size());

goods();

} catch (Exception e) {

goods();

}

}

static void jiesuan(){

try{

System.out.println("是否会员？是选1 否选0");

int x= scanint();

if (x==1){

huiyuan = true;

Scanner sc =new Scanner(System.in);

System.out.println("请输入您的会员号：");

int hui = sc.nextInt()/100%10;

if(hui==9){

System.out.println("恭喜你属于幸运会员,可以享受全场八折优惠");

xhuiyuan = true;

}else{

xhuiyuan = false;

}

}else if (x==0) {

huiyuan = false;

}

System.out.println("请输入消费金额:");

Scanner scan =new Scanner(System.in);

if(scan.hasNext()){

s=scan.nextInt();

outline();

System.out.println("是否参加优惠换购活动：" );

System.out.println("1:满50元，加2元换购"+bke );

System.out.println("2:满100元，加3元换购" +ke);

System.out.println("3:满100元，加10元换购" +m );

System.out.println("4:满200元，加10元换购" +ss );

System.out.println("5:满200元，加20元换购 " +o );

System.out.println("0：不换购\n请选择：\n" );

http:// outline();

os();

}

} catch (Exception e) {

System.out.println("请输入数字");

jiesuan();

}

}

static void out(String n , double s){

if(!(n==null)){

System.out.println("成功换购"+n);

}

System.out.println("本次消费总金额："+s+"元");

if (huiyuan && xhuiyuan){

System.out.println("尊敬的幸运会员，本次消费享受8折优惠");

double x =s*0.8;

System.out.println("折扣为您节省："+(s-x)+"元");

}else if (huiyuan) {

System.out.println("尊敬的会员，本次消费享受9折优惠");

double x =s*0.9;

System.out.println("折扣为您节省："+(s-x)+"元");

}

System.out.println("实际消费总金额："+s+"元");

showMain();

}

static void os(){

switch (scanint()) {

case 0:

out(null,s);

case 1:

if(s>=52){

out(bke,s+2);

}else{

Err();

}

case 2:

if(s>=103){

out(ke,s+3);

}else{

Err();

}

break;

case 3:

if(s>=110){

out(m,s+10);

}else{

Err();

}

break;

case 4:

if(s>=210){

out(ss,s+10);

}else{

Err();

}

break;

case 5:

if(s>=220){

out(o,s+20);

}else{

Err();

}

break;

default:

System.out.println("请重新选择");

os();

}

}

static void Err(){

System.out.println("金额不足\n");

main(null);

}

static class user{

static ArrayListarray=new ArrayList<>();

static Preferences nodes = Preferences.systemRoot().node("user"); //创建节点

static Preferences childnode = nodes.node( "user"); //创建子节点

public user() {

outline();

System.out.println("\t\t1,添加用户");

System.out.println("\t\t2,删除用户");

System.out.println("\t\t3,显示用户");

System.out.println("\t\t4,返回上级");

outline();

try {

int x=scanint();

switch (x) {

case 1:

add();

break;

case 2:

deluser();

break;

case 3:

show();

break;

case 4:

showMain();

break;

default:

System.out.println("没有您要的选项！请重新RxiZVwF选择");

new user();

break;

}

} catch (Exception e) {

new user();

}

}

private void deluser() throws BackingStoreException {

System.out.println("请选择要删除用户的ID：\n按0返回上级");

try {

Scanner scan =new Scanner(System.in);

int x = scan.nextInt();

boolean remove=false;

for (int i=0;i

if(x==Integer.parseInt(array.get(i))){

remove=true;

}

}

if (remove){

childnode.remove(Integer.toString(x));

System.out.println("删除成功");

}else if (x==0) {

new user();

}else {

System.out.println("没有此用户！");

deluser();

}

new user();

} catch (Exception e) {

System.out.println("请输入数字");

deluser();

}

}

private static void show() {

try {

int leng =childnode.keys().length;

syncread();

if(leng==0){

System.out.println("没有用户");

}else{

System.out.println("当前有"+childnode.keys().length+"位用户");

for(int i = 0;i<=childnode.keys().length;i++){

String shows =childnode.get(childnode.keys()[i], "");

System.out.println(shows);

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

}

}

} catch (BackingStoreException e) {

}

new user();

}

private static void syncread() {

try {

String[] arr= childnode.keys();

childnode.sync();

array.clear();

for(int i=0;i

array.add(arr[i]);

}

} catch (Exception e) {

}

}

private static void add(){

Preferences nodes = Preferences.systemRoot().node("user"); //创建节点

Preferences childnode = nodes.node( "user"); //创建子节点

outline();

System.out.println("\t\t请输入用户信息");

System.out.println("\t\t姓名,6位卡号,年龄,电话");

System.out.println("\t\t回车换行区分");

outline();

syncread();

String name =scanStr();

int card = scanint();

int age =scanint();

String tel =scanStr();

Random n=new Random();

String id ;

id = Integer.toString(n.nextInt(999)+1);

try{

childnode.put(id, "ID:"+id+" 姓名："+name+" 卡号："+card+" 年龄："+age+" 电话："+tel);

syncread();

System.out.println("第"+(childnode.keys().length)+"位会员添加成功");

System.out.println("当前用户"+childnode.keys().length+"位\n"+array+"\n"+array.size());

new user();

} catch (Exception e) {

new user();

}

}

}

}

更多学习资料请关注专题《管理系统开发》。

if(x==Integer.parseInt(array.get(i))){

remove=true;

}

}

if (remove){

childnode.remove(Integer.toString(x));

System.out.println("删除成功");

}else if (x==0) {

new user();

}else {

System.out.println("没有此用户！");

deluser();

}

new user();

} catch (Exception e) {

System.out.println("请输入数字");

deluser();

}

}

private static void show() {

try {

int leng =childnode.keys().length;

syncread();

if(leng==0){

System.out.println("没有用户");

}else{

System.out.println("当前有"+childnode.keys().length+"位用户");

for(int i = 0;i<=childnode.keys().length;i++){

String shows =childnode.get(childnode.keys()[i], "");

System.out.println(shows);

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

}

}

} catch (BackingStoreException e) {

}

new user();

}

private static void syncread() {

try {

String[] arr= childnode.keys();

childnode.sync();

array.clear();

for(int i=0;i

array.add(arr[i]);

}

} catch (Exception e) {

}

}

private static void add(){

Preferences nodes = Preferences.systemRoot().node("user"); //创建节点

Preferences childnode = nodes.node( "user"); //创建子节点

outline();

System.out.println("\t\t请输入用户信息");

System.out.println("\t\t姓名,6位卡号,年龄,电话");

System.out.println("\t\t回车换行区分");

outline();

syncread();

String name =scanStr();

int card = scanint();

int age =scanint();

String tel =scanStr();

Random n=new Random();

String id ;

id = Integer.toString(n.nextInt(999)+1);

try{

childnode.put(id, "ID:"+id+" 姓名："+name+" 卡号："+card+" 年龄："+age+" 电话："+tel);

syncread();

System.out.println("第"+(childnode.keys().length)+"位会员添加成功");

System.out.println("当前用户"+childnode.keys().length+"位\n"+array+"\n"+array.size());

new user();

} catch (Exception e) {

new user();

}

}

}

}

更多学习资料请关注专题《管理系统开发》。

array.add(arr[i]);

}

} catch (Exception e) {

}

}

private static void add(){

Preferences nodes = Preferences.systemRoot().node("user"); //创建节点

Preferences childnode = nodes.node( "user"); //创建子节点

outline();

System.out.println("\t\t请输入用户信息");

System.out.println("\t\t姓名,6位卡号,年龄,电话");

System.out.println("\t\t回车换行区分");

outline();

syncread();

String name =scanStr();

int card = scanint();

int age =scanint();

String tel =scanStr();

Random n=new Random();

String id ;

id = Integer.toString(n.nextInt(999)+1);

try{

childnode.put(id, "ID:"+id+" 姓名："+name+" 卡号："+card+" 年龄："+age+" 电话："+tel);

syncread();

System.out.println("第"+(childnode.keys().length)+"位会员添加成功");

System.out.println("当前用户"+childnode.keys().length+"位\n"+array+"\n"+array.size());

new user();

} catch (Exception e) {

new user();

}

}

}

}

更多学习资料请关注专题《管理系统开发》。

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