超市后台管理项目
package edu.xcdq.shop;
/**
* 商品物品类
*/
public class Article {
// 名字 单价 库存
public String name;
public double price;
public int amount;
public int number;
public int amout;
public void print( int index ) {
System.out.println(index +"\t" + name + "\t" + price
+ "\t" + amount + "\t" + number);
}
public void setArticle(String mingzi , double danjia, int kucun , int yishou){
name = mingzi;
price = danjia;
amount = kucun;
number = yishou;
}
}
继续创建菜单
package edu.xcdq.shop;
import com.sun.deploy.security.BadCertificateDialog;
import javax.swing.text.Style;
import java.util.Scanner;
public class ArticleManage {
ArticleSet articleSet = new ArticleSet();
private int i;
//
public void initial(){
Article xiaomi11 = new Article();
xiaomi11.name = "小米11";
xiaomi11.number = 30;
xiaomi11.amount = 0;
xiaomi11.price = 1999;
xiaomi11.setArticle("小米11",1999,30,0);
Article xiaomiPro = new Article();
xiaomiPro.setArticle("小米11pro",2999,10,0);
Article xiapmiUltra = new Article();
xiapmiUltra.setArticle("小米11至尊版",3999,20,0);
articleSet.articles[0] = xiaomi11;
articleSet.articles[1] = xiaomiPro;
articleSet.articles[2] = xiapmiUltra;
}
// 启动菜单
public void startMenu() {
System.out.println("************************");
System.out.println("1 查看商品信息");
System.out.println("2 新增商品信息");
System.out.println("3 删除商品信息");
System.out.println("4 卖出商品");
System.out.println("5 商品销售排行");
System.out.println("6 退出");
System.out.println("*************************");
System.out.println("请输入功能编号:");
Scanner scanner = new Scanner(System.in);
int funNo = scanner.nextInt();
switch (funNo) {
case 1:
System.out.println("查看商品信息");
chakan();
break;
case 2:
System.out.println("新增商品信息");
add();
break;
case 3:
System.out.println("删除商品信息");
delete();
break;
case 4:
System.out.println("卖出商品");
sell();
break;
case 5:
System.out.println("排行榜");
paihangbang();
break;
case 6:
System.out.println("谢谢，已经退出");
break;
default:
System.out.println("请输入的功能编号有错误");
break;
}
boolean flag = true;
do {
} while (flag);
}
private void chakan() {
System.out.println("编号 \t 名字 \t 单价 \t 库存 \t 已售 ");
for (int i = 0; i < articleSet.articles.length ; i++) {
if ( articleSet.articles[i] !=null ) {
articleSet.articles[i].print(i);
}
}
}
private void paihangbang() {
/*
for () 所有元素全部参与排序
for () 当前元素之和后面的元素比较
if ( 当前元素 < 后续元素小)
往后拍
*/
// 排序 (冒泡排序)
for (int i = 0; i < articleSet.articles.length - 1; i++) ;
for (int j = 0; i < articleSet.articles.length - i - 1; j++) {
if (articleSet.articles[j] != null && articleSet.articles[j + i] != null) {
if (articleSet.articles[j].number < articleSet.articles[j + i].number) {
Article newTemp = articleSet.articles[j];
articleSet.articles[j] = articleSet.articles[j + 1];
articleSet.articles[j + 1] = newTemp;
}
}
}
}
private void sell() {
System.out.println("请输入你要售卖的商品名称: ");
Scanner scanner = new Scanner(System.in);
String name = scanner.next();
int i;
for (i = 0; i < articleSet.articles.length; i++) ;
if ((articleSet.articles[i].name).equals(name)) {
System.out.println("请输入你要售卖的数量: ");
int shoumai = scanner.nextInt();
if (shoumai < articleSet.articles[i].amout) {
articleSet.articles[i].amout = articleSet.articles[i].number - shoumai;
articleSet.articles[i].number = articleSet.articles[i].amount + shoumai;
}
System.out.println("售卖成功");
}
}
private void delete() {
System.out.println("请输入要删除的商品的编号: ");
Scanner scanner = new Scanner(System.in);
int
bianhao = scanner.nextInt();
boolean flag = true;
for ( int i =0 ; i < articleSet.articles.length ;i++) {
if ( articleSet.articles[i] !=null && (i+1) == bianhao ) {
int j = i ;
while ( articleSet.articles[j+1] !=null ) {
// 后面的元素向前移动
articleSet.articles[j] = articleSet.articles[j + 1];
j++;
}
articleSet.articles[j] = null;
flag = true;
break;//
}else {
flag = false;
}
}
}
private void add() {
Scanner scanner = new Scanner(System.in);
System.out.println("请输入商品的名称: ");
String name = scanner.next();
System.out.println("请输入单价: ");
double price = scanner.nextDouble();
System.out.println("请输入库存: ");
int count = scanner.nextInt();
System.out.println("请输入已买的数量: ");
int number = scanner.nextInt();
Article newArticle = new Article();
newArticle.setArticle(name ,price ,count ,number );
for ( int i = 0 ; i < articleSet.articles.length; i++) {
if ( articleSet.articles[i] == null ) {
articleSet.articles[i] = newArticle;// 把新建对象放在数组中的第一个位置
break; // 后续的空位置直接跳过
}
}
}
}
创建商品集合类
package edu.xcdq.shop;
public class ArticleSet {
Article[] articles = new Article[30];
}
创建测试代码
package edu.xcdq.shop;
public class Demo {
public static void main(String[] args) {
ArticleManage articleManage = new ArticleManage();
articleManage.initial();
articleManage.startMenu();
}
}
以上代码仅供参考
