for (int i = 0; i < user.length; i++) {
if (user[i] != null) {
if (str1.equals(user[i].getUserName())
&& str2.equals(user[i].getPassWord())) {
if (user[i].getType() == 1) {
System.out.println("欢迎进入管理员界面！！");
while (true) {
System.out
.println("1.增加商品\t 2.删除商品\t 3.修改商品\t 4.商品显示\t 5.切换用户\t 0.退出系统");
Scanner scanner = new Scanner(System.in);
System.out.println("请选择功能：");
int sel = scanner.nextInt();
switch (sel) {
case 1:
add();
break;
case 2:
Scanner scan1 = new Scanner(System.in);
System.out.println("请输入要删除的商品编号：");
int sttr1 = scan1.nextInt();
System.out.println("是否确定要删除该商品？");
Scanner scan2 = new Scanner(System.in);
System.out
.println("请输入商品名（确认请输入'y'，取消请输入'n'）：");
String sttr2 = scan2.next();
if (sttr2.equals("y")) {
remove(sttr1);
} else if (sttr2.equals("n")) {
break;
} else {
System.out.println("输入有误！");
}
break;
case 3:
Scanner scan3 = new Scanner(System.in);
System.out.println("请输入商品编号：");
int strr = scan3.nextInt();
modify(strr);
break;
case 4:
show();
break;
case 5:
login();
break;
case 0:
System.exit(0);
break;
default:
System.out.println("输入有误！");
break;
}
}
} else {
System.out.println("欢迎进入用户界面！！");
num = i; // 登录的用户id
System.out.println(num);
while (true) {
System.out
.println("1.购买商品\t 2.商品搜索\t 3.商品展示\t 4.切换用户\t 0.退出系统");
Scanner scanner = new Scanner(System.in);
System.out.println("请选择功能：");
int sel = scanner.nextInt();
switch (sel) {
case 1:
Scanner scannerBuy = new Scanner(System.in);
System.out.println("请输入商品编号：");
int buyNo = scannerBuy.nextInt();
buy(buyNo);
break;
case 2:
Scanner sele = new Scanner(System.in);
System.out.println("请输入商品名：");
String selName = sele.next();
select(selName);
break;
case 3:
show();
break;
case 4:
login();
break;
case 0:
System.exit(0);
break;
default:
System.out.println("输入有误！");
break;
}
}
}
}
}
}
System.out.println("用户名与密码不符，请重新输入！");
}

// 加入购物车
@SuppressWarnings("resource")
public void cartAdd(int no) {
for (int i = 0; i < cart.length; i++) {
if (cart[i].getShoppingID() == 0) {
cart[i] = new shoppingCart(good[no].getShoppingID(),
good[no].getShoppingName(), good[no].getPrice());
System.out.println("购物车添加成功！");
System.out.println("请选择继续购物或进入购物车：1.继续购物\t 2.进入购物车 ");
Scanner scanner1 = new Scanner(System.in);
System.out.println("请选择：");
int str1 = scanner1.nextInt();
switch (str1) {
case 1:
show();
break;
case 2:
cartShow();
break;
default:
System.out.println("输入有误！！");
break;
}
break;
}
}
}