状态模式

1.UML类图

 

 

2.核心代码

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 
 6 namespace fd
 7 {
 8     public class Account
 9     {
10         public AccountState State { set; get; }
11         public string Owner { set; get; }
12         public double Balance { set; get; }
13 
14         public Account(string owner, double initialAmount)
15         {
16             Owner = owner;
17             Balance = initialAmount;
18             State = new VistorState(this);  
19         }
20 
21         public void SetBalance(double amount)
22         {
23             Balance = amount;
24 
25         }
26 
27      
28         public void Deposit(double amount)
29         {
30             Console.WriteLine("存入" + amount);
31             State.Deposit(amount);
32       
33         }
34 
35         public void Shopping(double amount)
36         {
37             Console.WriteLine("消费" + amount);
38             State.Shopping(amount);
39       
40     }
41 }
 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 
 6 namespace fd
 7 {
 8   
 9     public abstract class AccountState
10     {
11         protected Account _account;
12 
13         public abstract void Deposit(double amount);
14         public abstract void Shopping(double amount);
15         public abstract void StateCheck();
16     }
17 }
 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 
 6 namespace fd
 7 {
 8     
 9     class Program
10     {
11         static void Main(string[] args)
12         {
13             Account account = new Account("白石麻衣", 666666);
14             Console.WriteLine("开户成功。姓名==>" + account.Owner + " 初始金额==>" + account.Balance );
15 
16             account.Deposit(56);
17             Console.WriteLine("===================================");
18 
19         }
20     }
21 }
  1 using System;
  2 using System.Collections.Generic;
  3 using System.Linq;
  4 using System.Text;
  5 
  6 namespace fd
  7 {
  8   
  9     public class VistorState:AccountState
 10     {
 11         public VistorState(Account account)
 12         {
 13             _account = account;
 14             StateCheck();  
 15         }
 16 
 17   
 18         public override void Deposit(double amount)
 19         {
 20             _account.Balance += amount;
 21             Console.WriteLine( amount + "元，存款后的账户余额为：" + _account.Balance);
 22             StateCheck();
 23         }
 24 
 25         public override void Shopping(double amount)
 26         {
 27             double newBalance = _account.Balance - amount;
 28             if (newBalance > 0)
 29             {
 30                 _account.Balance -= amount;
 31                 Console.WriteLine( amount + "元，账户余额：" + _account.Balance);
 32             }
 33         
 34             StateCheck();
 35         }
 36 
 37 
 38         public override void StateCheck()
 39         {
 40             if (_account.Balance > 100 && _account.Balance < 1000)
 41             {
 42                 _account.State = new MemberState(_account);
 43             }
 44             else if (_account.Balance > 1000)
 45             {
 46                 _account.State = new VIPState(_account);
 47             }
 48         }
 49     }
 50 
 51     public class VIPState : AccountState
 52     {
 53         public VIPState(Account account)
 54         {
 55             _account = account;
 56         }
 57 
 58         public override void Deposit(double amount)
 59         {
 60             _account.Balance += amount;
 61             Console.WriteLine(amount + "元，存款后的账户余额为：" + _account.Balance);
 62             StateCheck();
 63         }
 64 
 65         public override void Shopping(double amount)
 66         {
 67             double newBalance = _account.Balance - amount;
 68             if (newBalance > 0)
 69             {
 70                 _account.Balance -= amount;
 71                 Console.WriteLine(amount + "元，账户余额：" + _account.Balance);
 72             }
 73             StateCheck();
 74         }
 75 
 76         public override void StateCheck()
 77         {
 78             if (_account.Balance > 0 && _account.Balance < 100)
 79             {
 80                 _account.State = new VistorState(_account);
 81             }
 82             else if (_account.Balance > 100 && _account.Balance < 1000)
 83             {
 84                 _account.State = new MemberState(_account);
 85             }
 86         }
 87     }
 88 
 89     public class MemberState : AccountState
 90     {
 91         public MemberState(Account account)
 92         {
 93             _account = account;
 94         }
 95 
 96 
 97         public override void Deposit(double amount)
 98         {
 99             _account.Balance += amount;
100             Console.WriteLine(amount + "元，存款后的账户余额为：" + _account.Balance);
101             StateCheck();
102         }
103 
104 
105         public override void Shopping(double amount)
106         {
107             double newBalance = _account.Balance - amount;
108             if (newBalance > 0)
109             {
110                 _account.Balance -= amount;
111                 Console.WriteLine(amount + "元，账户余额：" + _account.Balance);
112             }
113 
114             StateCheck();
115         }
116 
117 
118         public override void StateCheck()
119         {
120             if (_account.Balance > 0 && _account.Balance < 100)
121             {
122                 _account.State = new VistorState(_account);
123             }
124             else if (_account.Balance > 1000)
125             {
126                 _account.State = new VIPState(_account);
127 
128             }
129         }
130     }
131 }

 3.view on github

https://github.com/mengx8/test

posted @ 2015-12-31 14:38  mengx8  阅读(113)  评论(0)    收藏  举报