責任鏈模式：將能處理請求的對象連成一條鏈，并沿著這條鏈傳遞該請求，直到有一個對象處理請求為止，避免請求的發送者和接收者之間的耦合關系。
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
#encoding=utf-8 # #by panda #職責連模式 def printInfo(info): print unicode(info, 'utf-8').encode('gbk') #抽象職責類 class Manager(): successor = None name = '' def __init__(self, name): self.name = name def SetSuccessor(self, successor): self.successor = successor def HandleRequest(self, request): pass #具體職責類：經理 class CommonManager(Manager): def HandleRequest(self, request): if request.RequestType == '請假' and request.Number <= 2: printInfo('%s:%s 數量%d 被批準' % (self.name, request.RequestContent, request.Number)) else: if self.successor != None: self.successor.HandleRequest(request) #具體職責類：總監 class Majordomo(Manager): def HandleRequest(self, request): if request.RequestType == '請假' and request.Number <= 5: printInfo('%s:%s 數量%d 被批準' % (self.name, request.RequestContent, request.Number)) else: if self.successor != None: self.successor.HandleRequest(request) #具體職責類：總經理 class GeneralManager(Manager): def HandleRequest(self, request): if request.RequestType == '請假': printInfo('%s:%s 數量%d 被批準' % (self.name, request.RequestContent, request.Number)) elif request.RequestType == '加薪' and request.Number <= 500: printInfo('%s:%s 數量%d 被批準' % (self.name, request.RequestContent, request.Number)) elif request.RequestType == '加薪' and request.Number > 500: printInfo('%s:%s 數量%d 再說吧' % (self.name, request.RequestContent, request.Number)) class Request(): RequestType = '' RequestContent = '' Number = 0 def clientUI(): jinLi = CommonManager('金力') zongJian = Majordomo('宗健') zhongJingLi = GeneralManager('鐘金利') jinLi.SetSuccessor(zongJian) zongJian.SetSuccessor(zhongJingLi) request = Request() request.RequestType = '請假' request.RequestContent = '小菜請假' request.Number = 1 jinLi.HandleRequest(request) request.RequestType = '請假' request.RequestContent = '小菜請假' request.Number = 5 jinLi.HandleRequest(request) request.RequestType = '加薪' request.RequestContent = '小菜要求加薪' request.Number = 500 jinLi.HandleRequest(request) request.RequestType = '加薪' request.RequestContent = '小菜要求加薪' request.Number = 1000 jinLi.HandleRequest(request) return if __name__ == '__main__': clientUI(); |
類圖：
迭代器模式
迭代器模式：提供一種方法順序訪問一個聚合對象中的各個元素，而又不暴露該對象的內部表示。
python內置支持這種模式，所以一般來說，不用自己寫，
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
#encoding=utf-8 # #by panda #迭代器(Iterator)模式 def printInfo(info): print unicode(info, 'utf-8').encode('gbk') #迭代器抽象類 class Iterator: def First(self): pass def Next(self): pass def IsDone(self): pass def CurrentItem(self): pass #集合抽象類 class Aggregate: def CreateIterator(self): pass #具體迭代器類： class ConcreteIterator(Iterator): aggregate = None current = 0 def __init__(self, aggregate): self.aggregate = aggregate self.current = 0 def First(self): return self.aggregate[0] def Next(self): ret = None self.current += 1 if(self.current < len(self.aggregate)): ret = self.aggregate[self.current] return ret def IsDone(self): if(self.current < len(self.aggregate)): return False else: return True def CurrentItem(self): ret = None if(self.current < len(self.aggregate)): ret = self.aggregate[self.current] return ret #具體集合類 class ConcreteAggregate(Aggregate): items = None def __init__(self): self.items = [] def clientUI(): a = ConcreteAggregate() a.items.append('大鳥') a.items.append('小菜') a.items.append('行李') a.items.append('老外') a.items.append('公交內部員工') a.items.append('小偷') printInfo('---------迭代器模式-------------') i = ConcreteIterator(a.items) item = i.First() while(False == i.IsDone()): printInfo("%s 請買車票！" % i.CurrentItem()); i.Next() printInfo('\n---------python內部迭代-------------') for item in a.items: printInfo("%s 請買車票！" % item); return if __name__ == '__main__': clientUI(); |
類圖：
