상품 관리 시스템 자바 구현
실현 기능:상품 조회,신규,가격 변경,삭제 먼저 세 가지 기본 유형의 구축 상품 류,계 정 류,브랜드 류 1,상품 류
public class Goods {
// ： ， ， ， ，
private String goodsName;
private double goodsPrice;
private int goodsSales;
private String goodsCategories;
private int brandsNum;
private String GoodsNum;
public Goods(String goodsName, double goodsPrice, int goodsSales, String goodsCategories,int brandsNum, String goodsNum) {
this.goodsName = goodsName;
this.goodsPrice = goodsPrice;
this.goodsSales = goodsSales;
this.goodsCategories = goodsCategories;
this.brandsNum = brandsNum;
GoodsNum = goodsNum;
}
public int getBrandsNum() {
return brandsNum;
}
public void setBrandsNum(int brandsNum) {
this.brandsNum = brandsNum;
}
public Goods() {
}
public String getGoodsNum() {
return GoodsNum;
}
public void setGoodsNum(String goodsNum) {
GoodsNum = goodsNum;
}
public String getGoodsName() {
return goodsName;
}
public void setGoodsName(String goodsName) {
this.goodsName = goodsName;
}
public double getGoodsPrice() {
return goodsPrice;
}
public void setGoodsPrice(double goodsPrice) {
this.goodsPrice = goodsPrice;
}
public int getGoodsSales() {
return goodsSales;
}
public void setGoodsSales(int goodsSales) {
this.goodsSales = goodsSales;
}
public String getGoodsCategories() {
return goodsCategories;
}
public void setGoodsCategories(String goodsCategories) {
this.goodsCategories = goodsCategories;
}
public int getBrands() {
return brandsNum;
}
public void setBrands(int brandsNum) {
this.brandsNum = brandsNum;
}
}
각 속성의 get 과 set 방법 계 정 클래스 를 실현 하 였 습 니 다.
public class Accounts {
// ： ，
private String userName;
private String userPassword;
public Accounts(String userName, String userPassword) {
this.userName = userName;
this.userPassword = userPassword;
}
public Accounts() {
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getUserPassword() {
return userPassword;
}
public void setUserPassword(String userPassword) {
this.userPassword = userPassword;
}
}
브랜드 클래스
public class Brands {
// ： ，
private String brandsName;
private int brandsNum;
public Brands(String brandsName, int brandsNum) {
this.brandsName = brandsName;
this.brandsNum = brandsNum;
}
public String getBrandsName() {
return brandsName;
}
public void setBrandsName(String brandsName) {
this.brandsName = brandsName;
}
public int getBrandsNum() {
return brandsNum;
}
public void setBrandsNum(int brandsNum) {
this.brandsNum = brandsNum;
}
}
그 다음 에 이 세 가지 기본 적 인 정 보 를 저장 하 는 데이터 류 로 List 를 정의 하여 세 가지 유형의 저장 데이터 류 를 실현 한다.
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;
public class Database {
//
private List<Accounts>accountsList=new ArrayList<>();
//
private List<Goods>goodsList=new ArrayList<>();
//
private List<Brands>brandsList=new ArrayList<>();
public Database(){
//
， ，
}
public List<Accounts> getAccountsList() {
return accountsList;
}
public void setAccountsList(List<Accounts> accountsList) {
this.accountsList = accountsList;
}
public List<Goods> getGoodsList() {
return goodsList;
}
public void setGoodsList(List<Goods> goodsList) {
this.goodsList = goodsList;
}
public List<Brands> getBrandsList() {
return brandsList;
}
public void setBrandsList(List<Brands> brandsList) {
this.brandsList = brandsList;
}
}
그 다음 에 세 가지 기본 적 인 유형 이 각각 삭제 하고 검사 하 는 방법의 실현 이다.이것 은 프로그램의 수요 에 따라 상품 의 상호작용 유형 을 쓴다.
import java.util.ArrayList;
import java.util.List;
public class GoodsDAO {
//
private Database database;
// DAO ，
public GoodsDAO(Database database){
this.database=database;
}
//
public List<Goods>hotSell(){
List<Goods> temporList=database.getGoodsList();
for(int i=0;i<temporList.size();i++){
for(int j=0;j<temporList.size()-1-i;j++){
if(temporList.get(j).getGoodsSales()<temporList.get(j+1).getGoodsSales())
{
Goods e=temporList.get(j+1);
temporList.set(j+1,temporList.get(j));
temporList.set(j,e);
}
}
}
return temporList;
}
//
public Goods searchById(int id){
Goods goods;
goods=database.getGoodsList().get(id-1);
return goods;
}
//
public List<Goods>searchByBranchId(int brandsId){
List<Goods>temporList=new ArrayList<>();
for(Goods each:database.getGoodsList()){
if(each.getBrandsNum()==brandsId)
temporList.add(each);
}
if(temporList.isEmpty())
temporList=null;
return temporList;
}
//
public List<Goods>searchByPrice(double minPrice,double maxPrice){
List<Goods>temporList=new ArrayList<>();
for(Goods each:database.getGoodsList()){
if(each.getGoodsPrice()>=minPrice&&each.getGoodsPrice()<=maxPrice) {
temporList.add(each);
}
}
if(temporList.isEmpty())
temporList=null;
return temporList;
}
//
public void addGoods(Goods goods){
database.getGoodsList().add(goods);
}
//
public void modify(String goodsId,double price){
for(Goods each:database.getGoodsList()){
if(each.getGoodsNum().equals(goodsId))
each.setGoodsPrice(price);
}
}
//
public void delete(String goodsId){
Goods goods=null;
for(Goods each:database.getGoodsList()){
if(each.getGoodsNum().equals(goodsId))
goods=each;
}
database.getGoodsList().remove(goods);
// ArrayList ， ， 。
}
//
public void changeByBranchId(int brandsId){
for(Goods each:database.getGoodsList()){
if(each.getBrandsNum()==brandsId)
each.setBrandsNum(brandsId-1);
}
}
}
계 정 상호작용 클래스 등록,로그 인 수요 실현
public class AccountDAO {
//
private Database database;
// DAO ，
public AccountDAO(Database database){
this.database=database;
}
//
public Accounts searchAccounts(String userName){
Accounts accounts=null;
for(Accounts each:database.getAccountsList()){
if(each.getUserName().equals(userName))
accounts=each;
}
return accounts;
}
//
public void addAccount(Accounts accounts){
database.getAccountsList().add(accounts);
}
}
브랜드 클래스
public class BrandsDAO {
//
private Database database;
// DAO ，
public BrandsDAO(Database database){
this.database=database;
}
//
public Brands findByName(String brandName){
Brands brands=null;
for(Brands each:database.getBrandsList()){
if(each.getBrandsName().equals(brandName)) {
brands = each;
break;
}
}
return brands;
}
//
public void findAll(){
System.out.println(" ：");
for(Brands each:database.getBrandsList()){
System.out.println(each.getBrandsNum()+"\t"+each.getBrandsName());
}
}
//
public String findNameById(int id){
String brandName;
Brands brands=null;
for(Brands each:database.getBrandsList()){
if(each.getBrandsNum()==id){
brands=each;
}
}
return brands.getBrandsName();
}
//
public boolean findBranch(String brandsName){
boolean choose=false;
for(Brands each:database.getBrandsList())
{
if(each.getBrandsName().equals(brandsName))
choose=true;
}
return choose;
}
//
public void addBranch(Brands brands){
database.getBrandsList().add(brands);
}
//
public int brandsNumbers(){
int num=database.getBrandsList().size();
return num;
}
//
public void deleteBrands(int num){
Brands brands=null;
for(Brands each:database.getBrandsList()){
if(each.getBrandsNum()==num)
brands=each;
}
database.getBrandsList().remove(brands);
}
//
public void moveBrandsNum(int brandsNum){
int index;
for(int i=0;i<database.getBrandsList().size();i++){
if(database.getBrandsList().get(i).getBrandsNum()>brandsNum)
database.getBrandsList().get(i).setBrandsNum(database.getBrandsList().get(i).getBrandsNum()-1);
}
}
}
서비스 류 는 프로젝트 에 필요 한 기능 을 실현 하고 상호작용 인터페이스 를 구축한다.
public class GoodsSystem {
Scanner scanner=new Scanner(System.in);
Random random=new Random();
AccountDAO accountDAO;
BrandsDAO brandsDAO;
GoodsDAO goodsDAO;
// DAO
public GoodsSystem(Database database){
accountDAO=new AccountDAO(database);
brandsDAO=new BrandsDAO(database);
goodsDAO=new GoodsDAO(database);
}
public void start(){
// 1.
System.out.println("---------------- ---------------");
System.out.println("1. ");
// 2.
System.out.println("2. ");
// 3.
System.out.println("3. ");
System.out.println(" ：");
String choose=scanner.next();
switch(choose){
//
case "1":
login();
break;
//
case "2":
regist();
break;
//
case "3":
System.out.println(" ");
break;
default:
System.out.println(" ， ：");
start();
}
}
//
public void login(){
System.out.println(" ：");
String userName=scanner.next();
System.out.println(" ：");
String passWord=scanner.next();
Accounts accounts=accountDAO.searchAccounts(userName);
String testNum="";
if(accounts!=null){
if(accounts.getUserPassword().equals(passWord)){
for(int i=0;i<4;i++){
int num=random.nextInt(10);
testNum=testNum+num;
}
System.out.println(" ："+testNum);
System.out.println(" ：");
String testNumInput=scanner.next();
if(testNumInput.equals(testNum)) {
System.out.println(" ");
mainMenu();
}
else{
System.out.println(" ， ");
login();
}
}
else{
System.out.println(" ， ");
System.out.println(" ， 0 ");
String choose=scanner.next();
if(choose.equals("0"))
start();
else
login();
}
}
else{
System.out.println(" ， ：");
System.out.println(" ， 0 ");
String choose=scanner.next();
if(choose.equals("0"))
start();
else
login();
}
}
//
public void regist(){
System.out.println("---- ----");
//
System.out.println(" ：");
String userName=scanner.next();
Accounts accounts=accountDAO.searchAccounts(userName);
while(accounts!=null){
System.out.println(" ， ");
userName=scanner.next();
accounts=accountDAO.searchAccounts(userName);
}
//
System.out.println(" ：");
String userPassWord=scanner.next();
System.out.println(" ：");
String testPassWord=scanner.next();
while(!userPassWord.equals(testPassWord)){
System.out.println(" ， ");
System.out.println(" ：");
userPassWord=scanner.next();
System.out.println(" ：");
testPassWord=scanner.next();
}
//
String testNum="";
for(int i=0;i<4;i++){
int num=random.nextInt(10);
testNum=testNum+num;
}
System.out.println(" ："+testNum);
System.out.println(" ：");
String testNumInput=scanner.next();
if(testNumInput.equals(testNum)) {
accountDAO.addAccount(new Accounts(userName,userPassWord));
System.out.println(" ");
start();
}
else{
System.out.println(" ， ");
System.out.println(" ， 0 ");
String choose=scanner.next();
if(choose.equals("0"))
start();
else
regist();
}
}
//
public void mainMenu(){
System.out.println("------------- ------------");
// 1.
System.out.println("1. ");
// 2.
System.out.println("2. ");
// 3.
System.out.println("3. ");
System.out.println("4. ");
System.out.println(" ：");
String choose=scanner.next();
switch (choose){
case "1"://
hotSell();
break;
case "2"://
searchGoods();
break;
case "3"://
controlGoods();
break;
case "4"://
System.out.println(" ");
break;
default:
mainMenu();
}
}
//
public void hotSell(){
System.out.println("------------ ------------");
List <Goods>tempor=goodsDAO.hotSell();
System.out.println(" \t\t"+" "+"\t\t\t\t\t \t");
int num=10;
if(tempor.size()<10)
num=tempor.size();
for(int i=0;i<num;i++){
System.out.println((i+1)+"\t\t"+tempor.get(i).getGoodsName()+"\t\t\t\t\t"+tempor.get(i).getGoodsSales()+"\t");
}
System.out.println(" ID 0 。");
String chooseEnd=scanner.next();
if(isNumeric(chooseEnd)==true)
{
int choose=Integer.parseInt(chooseEnd);
if(choose==0){
mainMenu();
}
else
{
if(choose<=num&&choose>=0) {
Goods goods = goodsDAO.searchById(choose);
System.out.println(" \t\t \t\t \t\t ");
System.out.println(goods.getGoodsName() + "\t\t\t" + brandsDAO.findNameById(goods.getBrandsNum()) + "\t" + goods.getGoodsPrice() + " \t" + goods.getGoodsCategories());
mainMenu();
}
else
{
System.out.println(" ， ");
hotSell();
}
}
}
else
{
System.out.println(" ， ");
hotSell();
}
}
//
public void searchGoods(){
System.out.println("--------- ----------");
// 1.
System.out.println("1. ");
// 2.
System.out.println("2. ");
System.out.println("3. ");
System.out.println(" ：");
String choose=scanner.next();
switch(choose){
case "1"://
searchByBranch();
break;
case "2"://
searchByPrice();
break;
case "3":
mainMenu();
break;
default:
searchGoods();
}
}
//
public void controlGoods(){
System.out.println("-------- --------");
// 1.
System.out.println("1. ");
// 2.
System.out.println("2. ");
// 3.
System.out.println("3. ");
System.out.println("4. ");
System.out.println(" ：");
String choose=scanner.next();
switch (choose){
case "1"://
addGoods();
break;
case "2"://
changePrice();
break;
case "3"://
deleteGoods();
break;
case "4"://
mainMenu();
break;
default:
controlGoods();
}
}
//
public void searchByBranch(){
brandsDAO.findAll();
System.out.println(" ：");
String brandsNum1=scanner.next();
if(isNumeric(brandsNum1)) {
int brandsNum=Integer.parseInt(brandsNum1);
List<Goods> temporlist = goodsDAO.searchByBranchId(brandsNum);
if (temporlist == null) {
System.out.println(" ");
searchGoods();
}
for (int i = 0; i < temporlist.size(); i++) {
System.out.println(" " + (i + 1) + "\t" + " ：" + temporlist.get(i).getGoodsName());
}
System.out.println(" ID 0 。");
String choose1 = scanner.next();
if(isNumeric(choose1)) {
int choose=Integer.parseInt(choose1);
if (choose == 0) {
searchGoods();
} else {
if(choose>=1&&choose<=temporlist.size()){
Goods goods = temporlist.get(choose - 1);
System.out.println(" :" + goods.getGoodsName() + "\t" + " :" + brandsDAO.findNameById(goods.getBrandsNum()) + "\t" + " :" + goods.getGoodsPrice() + " \t" + " ：" + goods.getGoodsCategories());
searchGoods();
}
else{
System.out.println(" ， ");
searchByBranch();
}
}
}
else{
System.out.println(" ， ");
searchByBranch();
}
}
else{
System.out.println(" ， ");
searchByBranch();
}
}
//
public void searchByPrice(){
System.out.println(" : ");
double minPrice=scanner.nextDouble();
double maxPrice=scanner.nextDouble();
List<Goods>temporlist=goodsDAO.searchByPrice(minPrice,maxPrice);
if(temporlist==null){
System.out.println(" ");
searchGoods();
}
for(int i=0;i<temporlist.size();i++){
System.out.println(" "+(i+1)+"\t"+" ："+temporlist.get(i).getGoodsName());
}
System.out.println(" ID 0 。");
String choose1 = scanner.next();
if(isNumeric(choose1)) {
int choose=Integer.parseInt(choose1);
if (choose == 0) {
searchGoods();
}
else {
if(choose>=1&&choose<=temporlist.size()) {
Goods goods = temporlist.get(choose - 1);
System.out.println(" :" + goods.getGoodsName() + "\t" + " :" + brandsDAO.findNameById(goods.getBrandsNum()) + "\t" + " :" + goods.getGoodsPrice() + " \t" + " ：" + goods.getGoodsCategories());
searchGoods();
}
else{
System.out.println(" ， ");
searchByPrice();
}
}
}
else{
System.out.println(" ， ");
searchByPrice();
}
}
//
public void addGoods(){
System.out.println(" ：");
String goodsName=scanner.next();
System.out.println(" ：");
double goodsPrice=scanner.nextDouble();
System.out.println(" ");
String brandsName=scanner.next();
int brandsNum;
if(brandsDAO.findBranch(brandsName)){
brandsNum=brandsDAO.findByName(brandsName).getBrandsNum();
}
else{
brandsNum=brandsDAO.brandsNumbers()+1;
Brands brands=new Brands(brandsName,brandsNum);
brandsDAO.addBranch(brands);
}
System.out.println(" ");
String goodsCate=scanner.next();
Goods goods=new Goods(goodsName,goodsPrice,0,goodsCate,brandsNum, UUID.randomUUID().toString());
goodsDAO.addGoods(goods);
System.out.println(" ");
controlGoods();
}
//
public void changePrice(){
System.out.println("-------- ------");
brandsDAO.findAll();
System.out.println(" ：");
String brandsNum1=scanner.next();
if(isNumeric(brandsNum1)) {
int brandsNum=Integer.parseInt(brandsNum1);
List<Goods> temporlist = goodsDAO.searchByBranchId(brandsNum);
if (temporlist == null) {
System.out.println(" ");
changePrice();
}
for (int i = 0; i < temporlist.size(); i++) {
System.out.println(" " + (i + 1) + "\t" + " ：" + temporlist.get(i).getGoodsName() + "\t " + temporlist.get(i).getGoodsPrice() + " ");
}
System.out.println(" ID 0 。");
String choose1 = scanner.next();
if(isNumeric(choose1)) {
int choose=Integer.parseInt(choose1);
if (choose == 0) {
controlGoods();
}
else if(choose<=temporlist.size())
{
System.out.println(" ：");
double price = scanner.nextDouble();
System.out.println(" ： / ");
String endChoose = scanner.next();
if (endChoose.equals(" ")) {
goodsDAO.modify(temporlist.get(choose - 1).getGoodsNum(), price);
System.out.println(" ");
controlGoods();
} else {
controlGoods();
}
}
else{
System.out.println(" ， ");
changePrice();
}
}
else{
System.out.println(" ， ");
changePrice();
}
}
else{
System.out.println(" ， ");
changePrice();
}
}
//
public void deleteGoods(){
System.out.println("-------- ------");
brandsDAO.findAll();
System.out.println(" ：");
String brandsNum2=scanner.next();
if(isNumeric(brandsNum2)) {
int brandsNum=Integer.parseInt(brandsNum2);
List<Goods> temporlist = goodsDAO.searchByBranchId(brandsNum);
if (temporlist == null) {
System.out.println(" ");
deleteGoods();
}
for (int i = 0; i < temporlist.size(); i++) {
System.out.println(" " + (i + 1) + "\t" + " ：" + temporlist.get(i).getGoodsName());
}
System.out.println(" ID 0 。");
String choose1 = scanner.next();
if(isNumeric(choose1)) {
int choose=Integer.parseInt(choose1);
if (choose == 0) {
controlGoods();
}
else if(choose<=temporlist.size()){
System.out.println(" ： / ");
String endChoose = scanner.next();
if (endChoose.equals(" ")) {
int brandsNum1 = temporlist.get(choose - 1).getBrandsNum();
goodsDAO.delete(temporlist.get(choose - 1).getGoodsNum());
System.out.println(" ");
if (goodsDAO.searchByBranchId(brandsNum1) == null) {
brandsDAO.deleteBrands(brandsNum1);
brandsDAO.moveBrandsNum(brandsNum1);
for (int i = brandsNum1; i <= brandsDAO.brandsNumbers(); i++)
goodsDAO.changeByBranchId(i + 1);
}
controlGoods();
} else {
controlGoods();
}
}
else{
System.out.println(" ， ");
deleteGoods();
}
}
else{
System.out.println(" ， ");
deleteGoods();
}
}
else{
System.out.println(" ， ");
deleteGoods();
}
}
public boolean isNumeric(String str){
for (int i = str.length();--i>=0;){
if (!Character.isDigit(str.charAt(i))){
return false;
}
}
return true;
}
}
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