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总是多一份的钱

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[已关闭问题] 关闭于 2016-04-25 15:37
 1 public static void shoppingSettlementPage(int salesManSid) {
 2         System.out.println("■■■■■■■■■■■■■■■■结算■■■■■■■■■■■■■■■■");
 3         do {
 4             System.out.println("按 S 开始购物结算.按 0 返回账户登录界面");
 5             String choiNext=ScannerInfoString();
 6             if("0".equals(choiNext)){
 7                 //上一页
 8                 checkstandLogPage();
 9             }else if ("s".equals(choiNext) || "S".equals(choiNext)) {
10                 System.out.println("\n--请输入商品编号或商品名--");
11                 int gid=QueryPrint.querySettlement();
12                 switch (gid) {
13                 case -3:
14                     break;
15                 case -1:
16                     System.out.println("售罄!");
17                     break;
18                 default:
19                     System.out.println("商品编号:");
20                     int shoppingGid=ScannerNum();
21                     ArrayList<Goods> goodsList=new QueryPrint().queryGoodsKey(shoppingGid, null);
22                     if(goodsList==null || goodsList.size()==0){
23                         System.out.println("未查询到该商品!");
24                     }else {
25                         Goods goods=goodsList.get(0);
26                         int gNum=goods.getGnum();
27                         double gPrice=goods.getGprice();
28                         System.out.println("请输入购买数量:");
29                         do {
30                             int choicegoodsNum=ScannerNum();
31                             if(choicegoodsNum>gNum){
32                                 System.err.println("\t!!仓库储备不足!!");
33                                 System.out.println("--请重新输入购买数量--");
34                             }else {
35                                 double allPrice=Arith.mul(choicegoodsNum, gPrice);
36                                 System.out.println("\t\t\t  购物车结算\n");
37                                 System.out.println("\t\t商品名称\t商品单价\t购买数量\t总价\n");
38                                 System.out.println("\t\t" + goods.getGname()+ "\t" + gPrice + " $\t"+ choicegoodsNum + "\t" + allPrice
39                                         + " $\n");
40                                 
41                                 do {
42                                     System.out.println("确认购买:Y/N");
43                                     String chshopping=ScannerInfoString();
44                                     if ("Y".equals(chshopping) ||"y".equals(chshopping)) {
45                                         System.out.println("\n总价:" + allPrice
46                                                 + " $");
47                                         System.out.println("\n实际缴费金额");
48                                         
49                                         do {
50                                             double amount=ScannerInfo();
51                                             double balance=Arith.sub(amount, allPrice);
52                                             if(balance<0){
53                                                 System.err.println("\t!!缴纳金额不足!!");
54                                         System.out.println("\n请重新输入缴纳金额($)");
55                                             }else {
56                                                 Gsales gSales = new Gsales(goods.getGid(),salesManSid,choicegoodsNum);
57                                                 boolean insert=new GsalesDao().shoppingSettlement(gSales);
58                                                 int goodsNewNum=gNum-choicegoodsNum;
59                                                 Goods newGoods=new Goods(goods.getGid(),goodsNewNum);
60                                                 boolean update = new GoodsDao().updateGoods(3, newGoods);
61                                                 if(update && insert){
62                                                     System.out.println("找零:"+ balance);
63                                                     System.out.println("\n谢谢光临,欢迎下次惠顾");
64                                                 }else {
65                                                     System.out.println("!支付失败!");
66                                                 }
67                                                 shoppingSettlementPage(salesManSid);
68                                             }
69                                         } while (true);
70                                     }else if ("n".equals(chshopping) || "N".equals(chshopping)) {
71                                         shoppingSettlementPage(salesManSid);
72                                     }
73                                     System.out.println("确定购买?");
74                                 } while (true);
75                             }
76                         } while (true);
77                     }
78                     break;
79                 }
80             }else {
81                 System.out.println("输入有误!");
82             }
83         } while (true);
84     }
开始购物了
 1 public static int querySettlement() {
 2         int gid=-1;
 3         ArrayList<Goods> goodsSetList=new GoodsDao().queryGoods(3);
 4         if(goodsSetList==null || goodsSetList.size()<=0){
 5             System.out.println("无此商品!");
 6             gid=-3;
 7         }else {
 8             System.out.println("\t\t\t\t\t商品列表\n\n");
 9             System.out.println("\t商品编号\t\t商品名称\t\t商品价格\t\t商品数量\t\t备注\n");
10             
11             for (int i = 0; i < goodsSetList.size(); i++) {
12                 Goods goods=goodsSetList.get(i);
13                 if(goods.getGnum()>0){
14                     System.out.print("\t" + goods.getGid() + "\t\t"
15                             + goods.getGname() + "\t\t" + goods.getGprice()
16                             + "\t\t" + goods.getGnum());
17                     
18                     if(goods.getGnum()==0){
19                         System.out.println("售罄");
20                     }else if (goods.getGnum()<10) {
21                         System.out.println("即将售完(低于十件)");
22                     }else {
23                         System.out.println();
24                     }
25                     if(goodsSetList.size()== 1){
26                         gid=goods.getGid();
27                     }else {
28                         gid=-2;
29                     }
30                 }
31             }
32         }
33         return gid;
34     }
判断是否还有并打印
 1 package per.sww.tools;
 2 
 3 import java.math.BigDecimal;
 4 
 5 public class Arith {
 6     private static final int DEE_DIV_SCALE=2;
 7     
 8     public Arith() {
 9     }
10     
11     public static double add(double v1,double v2){
12         BigDecimal b1=new BigDecimal(Double.toString(v1));
13         BigDecimal b2=new BigDecimal(Double.toString(v2));
14         return b1.add(b2).doubleValue();
15     }
16 
17     public static double mul(double v1,double v2) {
18         BigDecimal b1=new BigDecimal(Double.toString(v1));
19         BigDecimal b2=new BigDecimal(Double.toString(v2));
20         return b1.add(b2).doubleValue();
21     }
22 
23     public static double sub(double v1,double v2) {
24         BigDecimal b1=new BigDecimal(Double.toString(v1));
25         BigDecimal b2=new BigDecimal(Double.toString(v2));
26         return b1.subtract(b2).doubleValue();
27     }
28     
29     public static double div(double v1,double v2){
30         return div(v1, v2);
31     }
32     
33     
34     public static double div(double v1,double v2,int scale){
35         if(scale<0){
36             throw new IllegalArgumentException("The scale must be a positive integer or zero");
37         }
38         BigDecimal b1=new BigDecimal(Double.toString(v1));
39         BigDecimal b2=new BigDecimal(Double.toString(v2));
40         return b1.divide(b2, scale, BigDecimal.ROUND_HALF_UP).doubleValue();
41     }
42     
43     public static double round(double v,int scale){
44         if(scale<0){
45             throw new IllegalArgumentException("The scale must be a positive integer or zero");
46         }
47 
48         BigDecimal bigDecimal=new BigDecimal(Double.toString(v));
49         BigDecimal one=new BigDecimal("1");
50         return bigDecimal.divide(one, scale, BigDecimal.ROUND_HALF_UP).doubleValue();
51     }
52 }
添加什么的所有的都在这里
cocoyoona的主页 cocoyoona | 初学一级 | 园豆:20
提问于:2016-04-25 15:10
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所有回答(1)
0
public static double mul(double v1,double v2) {
    BigDecimal b1=new BigDecimal(Double.toString(v1));
    BigDecimal b2=new BigDecimal(Double.toString(v2));
    return b1.multiply(b2).doubleValue();
}

這個寫錯..你寫成"加"了

RosonJ | 园豆:3279 (老鸟四级) | 2016-04-25 15:38

那个改回来了还是这样子= =

支持(0) 反对(0) cocoyoona | 园豆:20 (初学一级) | 2016-04-25 15:39

@眉间剪水泛千愁: 

怎麼可能?!

支持(0) 反对(0) RosonJ | 园豆:3279 (老鸟四级) | 2016-04-25 15:42

@RosonJ: 真的

支持(0) 反对(0) cocoyoona | 园豆:20 (初学一级) | 2016-04-25 15:50
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