import java.util.Scanner;//增加商品类
//此类用来录入一个商品的所有属性,并作为结果对其返回
public class Add {public Goods add1() {Scanner scanner = new Scanner(System.in);System.out.println("请输入商品名称");String name = scanner.next();System.out.println("请输入商品数量");int shuliang = scanner.nextInt();System.out.println("请输入商品价格");float jiage = scanner.nextFloat();System.out.println("请输入商品产地");String chandi = scanner.next();System.out.println("请输入商品编号");int bianhao = scanner.nextInt();return new Goods(shuliang, name, chandi, jiage, bianhao);}
}
import java.util.ArrayList;
import java.util.Scanner;//此类为删除商品类
//获取一个需要删除的商品的主键(biuanhao),并且返回bianhao
public class Delete {public int delete(ArrayList<Goods> goods) {//创建打印机类Scanner scanner = new Scanner(System.in);//此处int 类型的bianhao表示需要删除的元素的编号System.out.println("请输入要删除的商品编号");int bianhao = scanner.nextInt();for (int i = 0; i < goods.size(); i++) {Goods goods1 = goods.get(i);if (goods1.getBianhao() == bianhao) {goods.remove(i);rz rz =new rz();rizhi rizhi = new rizhi();String time=rizhi.rizhi1();rz.setTime(time);rz.setCaozuo("删除商品");return i;}}System.out.println("抱歉,没有该编号的商品");return 0;}}
public class Goods {//无参构造函数public Goods(){}private int shuliang;private String name;private String chandi;private float jiage;private int bianhao;public int getShuliang() {return shuliang;}public void setShuliang(int shuliang) {this.shuliang = shuliang;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getChandi() {return chandi;}public void setChandi(String chandi) {this.chandi = chandi;}public double getJiage() {return jiage;}public void setJiage(float jiage) {this.jiage = jiage;}public int getBianhao() {return bianhao;}public void setBianhao(int bianhao) {this.bianhao = bianhao;}@Overridepublic String toString() {return "Goods{" +"shuliang=" + shuliang +", name='" + name + '\'' +", chandi='" + chandi + '\'' +", jiage=" + jiage +", bianhao=" + bianhao +'}';}public Goods(int shuliang, String name, String chandi, float jiage, int bianhao) {this.shuliang = shuliang;this.name = name;this.chandi = chandi;this.jiage = jiage;this.bianhao = bianhao;}
}
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.Scanner;//记录销售数量
public class inOut {public int inOut1(ArrayList<Goods> goods) {Scanner scanner = new Scanner(System.in);System.out.println("请输入销售的商品编号");int bianhao = scanner.nextInt();System.out.println("请输入销售的数量");int shuliang = scanner.nextInt();rz rz = new rz();rizhi rizhi = new rizhi();String time=rizhi.rizhi1();rz.setTime(time);rz.setCaozuo("商品出货");for (int i = 0; i < goods.size(); i++) {if (bianhao == goods.get(i).getBianhao()) {int n=goods.get(i).getShuliang()-shuliang;goods.get(i).setShuliang(n);break;}}return 0;}
}
import java.util.ArrayList;
import java.util.Scanner;//此类提供修改功能的子功能
//返回用户输入的商品编号对应的商品在ArrayList<>容器中的索引值
public class Set {public int Set1(ArrayList<Goods> goods) {System.out.println("请输入需要修改商品的编号");Scanner scanner = new Scanner(System.in);int bianhao = scanner.nextInt();//判断是否有这个编号的商品for (int i = 0; i < goods.size(); i++) {if (goods.get(i).getBianhao() == bianhao) {return i;}}System.out.println("🐼提醒您,您输入的编号有误,数据库中没有编号为:"+bianhao+"的商品");return -1;}
}
package 集合框架.单列.学生管理系统.商品管理系统;import java.util.ArrayList;
import java.util.Scanner;//该类是用来接收Set类中的Set1()函数返回的值
public class Set2 {public void Set3(ArrayList<Goods> goods, int i) {Scanner scanner = new Scanner(System.in);System.out.println("请输入您要修改的数据");System.out.println("1.名称");System.out.println("2.编号");System.out.println("3.产地");System.out.println("4.价格");System.out.println("5.数量");int i1 = scanner.nextInt();if (i1 == 1) {System.out.println("请输入修改后名称");goods.get(i).setName(scanner.next());} else if (i1 == 2) {if (goods.size() != 1) {//创建while1变量//初始值为0,在进入while循环后会将其改为1//如果while循环中嵌套的for循环中的if判断为正确,代表有编号重复//此时将while1的值再次改为0,使其仍然满足while循环int while1 = 0;while (while1 == 0) {System.out.println("请输入修改后的编号");//i2用来接收修改后的编号int i2 = scanner.nextInt();goods.get(i).setBianhao(i2);while1 = 1;//遍历集合元素for (int i3 = 0; i3 < goods.size(); i3++) {//判断是否编号重复,如果新编号与此商品的原来编号重复,则判断结果为false,不会将while1的值改为0if (i2 == goods.get(i3).getBianhao() && i2 != goods.get(i).getBianhao()) {System.out.println("编号重复无法修改,请输入唯一的编号");while1 = 0;break;}}}} else {System.out.println("请输入修改后编号");goods.get(i).setBianhao(scanner.nextInt());}} else if (i1 == 3) {System.out.println("请输入修改后的产地");goods.get(i).setChandi(scanner.next());} else if (i1 == 4) {System.out.println("请输入修改后的价格");goods.get(i).setJiage(scanner.nextFloat());} else if (i1 == 5) {System.out.println("请输入修改后的数量");goods.get(i).setShuliang(scanner.nextInt());}rz rz =new rz();rizhi rizhi = new rizhi();String time=rizhi.rizhi1();rz.setTime(time);rz.setCaozuo("修改商品");}
}
import java.util.ArrayList;//该类为输出所有元素的类
public class to {public void to1(ArrayList<Goods> goods) {System.out.println("编号 名称 数量 价格 产地");for (int i = 0; i < goods.size(); i++) {System.out.print(goods.get(i).getBianhao() + " ");System.out.print(goods.get(i).getName() + " ");System.out.print(goods.get(i).getShuliang() + " ");System.out.print(goods.get(i).getJiage() + " ");System.out.println(goods.get(i).getChandi() + " ");}rizhi rizhi = new rizhi();rz rz = new rz();String time = rizhi.rizhi1();rz.setTime(time);rz.setCaozuo("查看元素");}}
import java.util.ArrayList;
//库存预警
public class yujing {public void yujing1(ArrayList<Goods> goods) {for (int i = 0; i < goods.size(); i++) {int n = goods.get(i).getShuliang();if (n < 10) {System.out.println("🐼提醒您"+goods.get(i).getName() + "数量为" + n + "建议补货");}}}
}
import java.util.ArrayList;//输入异常处理类
public class yichang {public void yichang1(ArrayList<Goods> goods){Add add = new Add();rizhi rizhi = new rizhi();rz rz = new rz();try{goods.add(add.add1());String time =rizhi.rizhi1();rz.setTime(time);rz.setCaozuo("添加商品");}catch(java.util.InputMismatchException e){System.out.println("🐼提醒您价格或数量输入错误🐼已删除该商品信息,请重新输入");yichang1(goods);}}
}
package 集合框架.单列.学生管理系统.商品管理系统;import java.util.ArrayList;
import java.util.Scanner;public class Demo {public static void main(String[] args) {//构建存储容器ArrayList<Goods> goods = new ArrayList<>();//构建日志存储器ArrayList<rz> rz1 = new ArrayList<>();Delete delete = new Delete();to to = new to();Add Add = new Add();Set set = new Set();Set2 set2 = new Set2();yichang yichang = new yichang();inOut inOut = new inOut();yujing yujing = new yujing();torz torz = new torz();Scanner scanner = new Scanner(System.in);// 此处xuhao用来接收demo()函数返回的demo这个方法里面的xuhaofor (; ; ) {//进行预警yujing.yujing1(goods);//生成操作界面int xuhao = demo();if (xuhao == 1) {yichang.yichang1(goods);//检查是否重复编号,并删除重复编号的商品//要判断是否为一个商品,如果仅为一个商品必然不可能重复编号if (goods.size() != 1) {//定义一个i1,如果下面的if判断为true就改成0,这样就可以把通过if判断的goods元素(编号重复的商品)无法通过第二个if判断//即无法输出商品添加成功int i1 = 1;for (int i = 0; i < goods.size() - 1; i++) {//判断最后一个元素,(也就是刚刚加入的商品)的属性——编号是否与其他元素的该属性相同//为了不与最后一个元素(该商品自己本身)进行比较,循环的判定条件:i要小于集合的长度-1//以避免与自己本身进行比较,如果不进行此操作,则集合中的编号必然重复if (goods.get(goods.size() - 1).getBianhao() == goods.get(i).getBianhao()) {System.out.println("🐼提醒您,您输入的编号有重复");goods.remove(goods.size() - 1);System.out.println("🐼已帮您删除您刚刚输入的商品");i1 = 0;}
// else {
// System.out.println("商品添加成功");
// break;
// }}if (i1 == 1) {System.out.println("商品添加成功");}} else {System.out.println("商品添加成功");}}if (xuhao == 2) {to.to1(goods);}if (xuhao == 3) {//如果i=-1代表编号重复,则不调用执行修改功能的函数Set2int i = set.Set1(goods);if (i != -1) {set2.Set3(goods, i);}}if (xuhao == 4) {delete.delete(goods);}if (xuhao == 5) {inOut.inOut1(goods);}if (xuhao == 6) {System.out.println("您确定要退出🐼商品管理系统吗?");System.out.println("如果确实退出请输入----确认退出,不想退出请输入其他任意键");String yes_Or_no = scanner.next();if (yes_Or_no.equals("确认退出")) {System.out.println("感谢您的使用,🐼商品管理系统即将退出");System.out.println("-----退出成功----");break;}}}}public static int demo() {System.out.println("===============欢迎使用🐼商品管理系统===============");System.out.println("1.新增商品");System.out.println("2.查询商品");System.out.println("3.修改商品");System.out.println("4.删除商品");System.out.println("5.商品出货");System.out.println("6.退出系统");System.out.println("请选择[1--6]");Scanner scanner = new Scanner(System.in);//此处的变量序号为选择功能时的序号int xuhao = scanner.nextInt();return xuhao;}
}