商品维护模块主要包括:商品添加(输入商品编号,名称,价格,数量),商品列表显示,商品入库(输入商品编号,然后提示用户输入入库数量,然后进行修改操作),商品出库(输入商品编号,然后提示用户输入出库数量,然后进行修改操作),修改商品价格(提示用户输入编号,然后输入新价格)。
采用Scanner提示用户进行输入,用System.out.println实现界面。
商品维护模块主要包括:商品添加(输入商品编号,名称,价格,数量),商品列表显示,商品入库(输入商品编号,然后提示用户输入入库数量,然后进行修改操作),商品出库(输入商品编号,然后提示用户输入出库数量,然后进行修改操作),修改商品价格(提示用户输入编号,然后输入新价格)。
采用Scanner提示用户进行输入,用System.out.println实现界面。
public class Demo3Redo {
public static void main(String[] args) {
Map<String, Good> goodsMap = new HashMap<String, Good>() {
{
put("GOOD1", new Good("GOOD1", "商品1", 10.0, 30));
put("GOOD2", new Good("GOOD2", "商品2", 90.0, 20));
put("GOOD3", new Good("GOOD3", "商品3", 10.3, 11));
put("GOOD4", new Good("GOOD4", "商品4", 9.0, 10));
}
};
Scanner sc = new Scanner(System.in);
while (true){
System.out.println("请输入菜单编号:");
System.out.println("1 商品展示:");
System.out.println("2 商品入库:");
System.out.println("3 商品出库:");
System.out.println("4 价格修改:");
System.out.println("5 退出:");
String flag = sc.nextLine();
switch (flag) {
case "1":
System.out.println("商品编号 商品名称 商品价格 商品库存");
for (Map.Entry<String, Good> goodEntry : goodsMap.entrySet()) {
Good good = goodEntry.getValue();
System.out.println(good.getId() + " " + good.getName() + " " + good.getPrice() + " " + good.getInventory());
}
break;
case "2":
System.out.println("请输入商品编号:");
String id = sc.nextLine();
Good good = goodsMap.get(id);
System.out.println("请输入入库数量:");
String count = sc.nextLine();
good.setInventory(good.getInventory() + new Integer(count));
break;
case "3":
System.out.println("请输入商品编号:");
String idIncre = sc.nextLine();
Good goodIncre = goodsMap.get(idIncre);
System.out.println("请输入出库数量:");
String incre = sc.nextLine();
int i = goodIncre.getInventory() - new Integer(incre);
if (i < 0) {
i = 0;
}
goodIncre.setInventory(i);
break;
case "4":
System.out.println("请输入商品编号:");
String idPrice = sc.nextLine();
Good goodPrice = goodsMap.get(idPrice);
System.out.println("价格:");
String price = sc.nextLine();
goodPrice.setPrice(new Double(price));
break;
case "5":
System.exit(0);
}
}
}
}
class Good {
private String id;
private String name;
private Double price;
private int inventory;
public Good(String id, String name, Double price, int inventory) {
this.id = id;
this.name = name;
this.price = price;
this.inventory = inventory;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Double getPrice() {
return price;
}
public void setPrice(Double price) {
this.price = price;
}
public int getInventory() {
return inventory;
}
public void setInventory(int inventory) {
this.inventory = inventory;
}
}