{"id":1375,"date":"2020-02-12T21:37:00","date_gmt":"2020-02-12T13:37:00","guid":{"rendered":"https:\/\/www.yumefx.com\/?p=1375"},"modified":"2021-03-03T17:08:36","modified_gmt":"2021-03-03T09:08:36","slug":"%e6%b7%b1%e5%85%a5%e6%b5%85%e5%87%ba%e7%90%86%e8%a7%a3python%e8%a3%85%e9%a5%b0%e5%99%a8","status":"publish","type":"post","link":"https:\/\/www.yumefx.com\/?p=1375","title":{"rendered":"\u6df1\u5165\u6d45\u51fa\u7406\u89e3python\u88c5\u9970\u5668"},"content":{"rendered":"\n

\u65e0\u8bba\u662f\u5728Python\u6807\u51c6\u5e93\u8fd8\u662f\u7b2c\u4e09\u65b9\u5e93\u4e2d\uff0c\u6211\u4eec\u8d8a\u6765\u8d8a\u9891\u7e41\u5730\u770b\u5230\u88c5\u9970\u5668\u7684\u8eab\u5f71\uff0c\u4ece\u67d0\u79cd\u7a0b\u5ea6\u4e0a\u800c\u8a00\uff0cPython\u4e2d\u7684\u88c5\u9970\u5668\u662fPython\u8fdb\u9636\u8005\u7684\u4e00\u6761\u5fc5\u7531\u4e4b\u8def\uff0c\u6b63\u786e\u5408\u7406\u5730\u4f7f\u7528\u88c5\u9970\u5668\u53ef\u4ee5\u8ba9\u6211\u4eec\u7684\u5f00\u53d1\u5982\u864e\u6dfb\u7ffc\u3002<\/p>\n

\u88c5\u9970\u5668\u5929\u7136\u5730\u548c\u51fd\u6570\u5f0f\u7f16\u7a0b\u3001\u8bbe\u8ba1\u6a21\u5f0f\u3001AOP\u7b49\u6982\u5ff5\u4ea7\u751f\u8054\u7cfb\uff0c\u8fd9\u66f4\u52a0\u8ba9\u6211\u5bf9Python\u4e2d\u7684\u8fd9\u4e2a\u7279\u6027\u4ea7\u751f\u5174\u8da3\u3002\u6240\u4ee5\uff0c\u5728\u8fd9\u7bc7\u6587\u7ae0\u4e2d\u6211\u5c06\u5e26\u9886\u5927\u5bb6\u4e00\u8d77\u6765\u5256\u6790Python\u4e2d\u7684\u88c5\u9970\u5668\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u5b66\u4e60Python\u6709\u6240\u5e2e\u52a9\u3002<\/p>\n

\u00a0<\/h1>\n

\u4ec0\u4e48\u662f\u88c5\u9970\u5668<\/h1>\n

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\u00a0<\/h3>\n

\u51fd\u6570\u5bf9\u8c61<\/h3>\n\n\n\n
\ndef square(n):<\/span>\n    return n * n<\/span>\nfunc = square<\/span>\nprint func    #<function square at 0x01FF9FB0><\/span>\nprint func(5) #25<\/span>\n<\/pre>\n\n\n\n
\u53ef\u4ee5\u6ce8\u610f\u5230\uff0c\u6211\u4eec\u5c06\u4e00\u4e2a\u51fd\u6570\u76f4\u63a5\u8d4b\u503c\u7ed9\u4e00\u4e2a\u53d8\u91cf\uff0c\u6b64\u65f6\u8be5\u53d8\u91cf\u8868\u793a\u7684\u662f\u4e00\u4e2a\u51fd\u6570\u5bf9\u8c61\u7684\u5b9e\u4f8b\uff0c\u4ec0\u4e48\u53eb\u505a\u51fd\u6570\u5bf9\u8c61\u5462\uff1f\u5c31\u662f\u8bf4\u4f60\u53ef\u4ee5\u5c06\u8fd9\u4e2a\u5bf9\u8c61\u50cf\u51fd\u6570\u4e00\u6837\u4f7f\u7528\uff0c\u6240\u4ee5\u5f53\u5b83\u5e26\u62ec\u53f7\u548c\u53c2\u6570\u65f6\uff0c\u8868\u793a\u7acb\u5373\u8c03\u7528\u4e00\u4e2a\u51fd\u6570\uff1b\u5f53\u5b83\u4e0d\u5e26\u62ec\u53f7\u548c\u53c2\u6570\u65f6\uff0c\u8868\u793a\u4e00\u4e2a\u51fd\u6570\u3002<\/p>\n
\u5728C#\u4e2d\u6211\u4eec\u6709\u4e00\u4e2a\u76f8\u8fd1\u7684\u6982\u5ff5\u88ab\u79f0\u4e3a\u59d4\u6258\uff0c\u800c\u59d4\u6258\u672c\u8d28\u4e0a\u662f\u4e00\u4e2a\u51fd\u6570\u6307\u9488\uff0c\u5373\u8868\u793a\u6307\u5411\u4e00\u4e2a\u65b9\u6cd5\u7684\u5f15\u7528\uff0c\u4ece\u8fd9\u4e2a\u89d2\u5ea6\u6765\u770b\uff0cC#\u4e2d\u7684\u59d4\u6258\u7c7b\u4f3c\u4e8e\u8fd9\u91cc\u7684\u51fd\u6570\u5bf9\u8c61\uff0c\u56e0\u4e3aPython\u662f\u4e00\u4e2a\u52a8\u6001\u8bed\u8a00\uff0c\u6240\u4ee5\u6211\u4eec\u53ef\u4ee5\u76f4\u63a5\u5c06\u4e00\u4e2a\u51fd\u6570\u8d4b\u503c\u7ed9\u4e00\u4e2a\u5bf9\u8c61\uff0c\u800c\u65e0\u9700\u501f\u52a9Delegate\u8fd9\u6837\u7684\u7279\u6b8a\u7c7b\u578b\u3002<\/p>\n
\u00a0<\/h3>\n
\u4f7f\u7528\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570<\/h3>\n\n\n\n
\ndef sum_square(f,m,n):<\/span>\n    return f(m) + f(n)<\/span>\nprint sum_square(square,3,4) #25<\/span>\n<\/pre>\n\n\n\n
\u00a0<\/h3>\n
\u4f7f\u7528\u51fd\u6570\u4f5c\u4e3a\u8fd4\u56de\u503c<\/h3>\n\n\n\n
\ndef square_wrapper():<\/span>\n    def square(n):<\/span>\n        return n * n<\/span>\n    return square<\/span>\n<\/span>\nwrapper = square_wrapper()<\/span>\nprint wrapper(5) #25<\/span>\n<\/pre>\n\n\n\n
\u65e2\u7136\u5728Python\u4e2d\u5b58\u5728\u51fd\u6570\u5bf9\u8c61\u8fd9\u6837\u7684\u7c7b\u578b\uff0c\u53ef\u4ee5\u8ba9\u6211\u4eec\u50cf\u4f7f\u7528\u666e\u901a\u5bf9\u8c61\u4e00\u6837\u4f7f\u7528\u51fd\u6570\u3002\u90a3\u4e48\uff0c\u6211\u4eec\u81ea\u7136\u53ef\u4ee5\u5c06\u51fd\u6570\u63a8\u5e7f\u5230\u666e\u901a\u5bf9\u8c61\u9002\u7528\u7684\u6240\u6709\u573a\u5408\uff0c\u5373\u8003\u8651\u8ba9\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570\u548c\u8fd4\u56de\u503c\uff0c\u56e0\u4e3a\u666e\u901a\u5bf9\u8c61\u90fd\u90fd\u5177\u5907\u8fd9\u6837\u7684\u80fd\u529b\u3002<\/p>\n
\u4e3a\u4ec0\u4e48\u8981\u63d0\u5230\u8fd9\u4e24\u70b9\u5462\uff1f\u56e0\u4e3a\u8ba9\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570\u548c\u8fd4\u56de\u503c\uff0c\u8fd9\u4e0d\u4ec5\u662f\u51fd\u6570\u5f0f\u7f16\u7a0b\u4e2d\u9ad8\u9636\u51fd\u6570\u7684\u57fa\u672c\u6982\u5ff5\uff0c\u800c\u4e14\u662f\u95ed\u5305\u3001\u533f\u540d\u65b9\u6cd5\u548clambda\u7b49\u7279\u6027\u7684\u7406\u8bba\u57fa\u7840\u3002<\/p>\n
\u4eceES6\u4e2d\u7684\u7bad\u5934\u51fd\u6570\u3001Promise\u3001React\u7b49\u53ef\u4ee5\u770b\u51fa\uff0c\u51fd\u6570\u5f0f\u7f16\u7a0b\u5728\u524d\u7aef\u5f00\u53d1\u4e2d\u8d8a\u6765\u8d8a\u6d41\u884c\uff0c\u800c\u8fd9\u4e9b\u6982\u5ff5\u5728\u539f\u7406\u4e0a\u662f\u76f8\u901a\u7684\uff0c\u8fd9\u6216\u8bb8\u4e3a\u6211\u4eec\u5b66\u4e60\u51fd\u6570\u5f0f\u7f16\u7a0b\u63d0\u4f9b\u4e86\u4e00\u79cd\u65b0\u7684\u601d\u8def\u3002<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0csum_square()\u548csquare_wrapper()\u4e24\u4e2a\u51fd\u6570\uff0c\u5206\u522b\u4e3a\u6211\u4eec\u5c55\u793a\u4e86\u4f7f\u7528\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570\u548c\u8fd4\u56de\u503c\u7684\u53ef\u884c\u6027\u3002<\/p>\n\n\n\n
\ndef outer(m):<\/span>\n    n = 10<\/span>\n    def inner():<\/span>\n        return m + n<\/span>\n    return inner<\/span>\nfunc = outer(5)<\/span>\nprint func() #15<\/span>\n<\/pre>\n\n\n\n
\n#\u5185\u51fd\u6570\u4fee\u6539\u5916\u51fd\u6570\u5c40\u90e8\u53d8\u91cf<\/span>\ndef outer(a):<\/span>\n    b = [10]<\/span>\n    def inner():<\/span>\n        b[0] += 1<\/span>\n        return a + b[0]<\/span>\n    return inner<\/span>\n<\/span>\nfunc = outer(5)<\/span>\nprint func() #16<\/span>\nprint func() #17<\/span>\n<\/pre>\n\n\n\n
\u5bf9Python\u8fd9\u95e8\u8bed\u8a00\u6765\u8bf4\uff0c\u8fd9\u91cc\u7684outer()\u51fd\u6570\u548cinner()\u51fd\u6570\u5206\u522b\u88ab\u79f0\u4e3a\u5916\u51fd\u6570\u548c\u5185\u51fd\u6570\uff0c\u53d8\u91cfn\u7684\u5b9a\u4e49\u4e0d\u5728inner()\u51fd\u6570\u5185\u90e8\uff0c\u56e0\u6b64\u53d8\u91cfn\u79f0\u4e3ainner()\u51fd\u6570\u7684\u73af\u5883\u53d8\u91cf\u3002<\/p>\n
\u5728Python\u4e2d\uff0c\u4e00\u4e2a\u51fd\u6570\u53ca\u5176\u73af\u5883\u53d8\u91cf\u5c31\u6784\u6210\u4e86\u95ed\u5305(Closure)\u3002\u8981\u7406\u89e3\u95ed\u5305\u6211\u8ba4\u4e3a\u6211\u4eec\u53ef\u4ee5\u628a\u63e1\u8fd9\u4e09\u70b9\uff1a<\/p>\n
    \n
  1. \u5916\u51fd\u6570\u8fd4\u56de\u4e86\u5185\u51fd\u6570\u7684\u5f15\u7528\uff0c\u5373\u6211\u4eec\u8c03\u7528outer()\u51fd\u6570\u65f6\u8fd4\u56de\u7684\u662finner()\u51fd\u6570\u7684\u5f15\u7528\uff1b<\/li>\n
  2. \u5916\u51fd\u6570\u5c06\u81ea\u5df1\u7684\u5c40\u90e8\u53d8\u91cf\u7ed1\u5b9a\u5230\u5185\u51fd\u6570\uff0c\u5176\u4e2d\u53d8\u91cfb\u7684\u76ee\u7684\u662f\u5c55\u793a\u5982\u4f55\u5728\u5185\u51fd\u6570\u4e2d\u4fee\u6539\u73af\u5883\u53d8\u91cf\uff1b<\/li>\n
  3. \u8c03\u7528\u5185\u51fd\u6570\u610f\u5473\u7740\u53d1\u751f\u51fa\u3001\u5165\u6808\uff0c\u4e0d\u540c\u7684\u662f\u6bcf\u6b21\u8c03\u7528\u90fd\u5171\u4eab\u540c\u4e00\u4e2a\u95ed\u5305\u53d8\u91cf\uff0c\u8bf7\u53c2\u8003\u7b2c\u4e8c\u4e2a\u793a\u4f8b\u3002<\/li>\n<\/ol>\n
    \u597d\u4e86\uff0c\u73b0\u5728\u8bb2\u5b8c\u95ed\u5305\u4ee5\u540e\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u5f00\u59cb\u8bf4Python\u4e2d\u7684\u88c5\u9970\u5668\u5566\u3002<\/p>\n
    \u00a0<\/h1>\n
    \u88c5\u9970\u5668<\/h1>\n
    \u88c5\u9970\u5668\u662f\u4e00\u79cd\u9ad8\u7ea7Python\u8bed\u6cd5\uff0c\u88c5\u9970\u5668\u53ef\u4ee5\u5bf9\u4e00\u4e2a\u51fd\u6570\u3001\u65b9\u6cd5\u6216\u8005\u7c7b\u8fdb\u884c\u52a0\u5de5\u3002\u6240\u4ee5\uff0c\u88c5\u9970\u5668\u5c31\u50cf\u5973\u5b69\u5b50\u7684\u68b3\u5986\u76d2\uff0c\u7ecf\u8fc7\u4e00\u756a\u6253\u626e\u540e\uff0c\u53ef\u4ee5\u8ba9\u5973\u5b69\u5b50\u66f4\u6f02\u4eae\u3002<\/p>\n
    \u88c5\u9970\u5668\u4f7f\u7528\u8d77\u6765\u662f\u975e\u5e38\u7b80\u5355\u7684\uff0c\u5176\u96be\u70b9\u4e3b\u8981\u5728\u5982\u4f55\u53bb\u5199\u4e00\u4e2a\u88c5\u9970\u5668\u3002\u5e26\u7740\u8fd9\u4e2a\u95ee\u9898\uff0c\u6211\u4eec\u6765\u4e00\u8d77\u770b\u770bPython\u4e2d\u7684\u88c5\u9970\u5668\u662f\u5982\u4f55\u5de5\u4f5c\u7684\uff0c\u4ee5\u53ca\u4e3a\u4ec0\u4e48\u6211\u4eec\u8bf4\u88c5\u9970\u5668\u7684\u672c\u8d28\u5c31\u662f\u51fd\u6570\u3002<\/p>\n
    \u65e9\u671f\u7684Python\u4e2d\u5e76\u6ca1\u6709\u88c5\u9970\u5668\u8fd9\u4e00\u8bed\u6cd5\uff0c\u6700\u65e9\u51fa\u5728Python 2.5\u7248\u672c\u4e2d\u4e14\u4ec5\u4ec5\u652f\u6301\u51fd\u6570\u7684\u88c5\u9970\uff0c\u5728Python 2.6\u53ca\u4ee5\u540e\u7248\u672c\u4e2d\u88c5\u9970\u5668\u88ab\u8fdb\u4e00\u6b65\u7528\u4e8e\u7c7b\u3002<\/p>\n\n\n\n
    \nfrom functools import reduce<\/span>\n<\/span>\ndef decorator_print(func):<\/span>\n    def wrapper(arg): <\/span>\n        print arg <\/span>\n        return func(arg)<\/span>\n    return wrapper<\/span>\n<\/span>\n@decorator_print<\/span>\ndef sum(array):<\/span>\n    return reduce(lambda x,y:x+y,array)<\/span>\n<\/span>\ndata = [1,3,5,7,9]<\/span>\nprint sum(data)<\/span>\n<\/pre>\n\n\n\n
    \u6211\u4eec\u6ce8\u610f\u5230\u88c5\u9970\u5668\u53ef\u4ee5\u4f7f\u7528def\u6765\u5b9a\u4e49\uff0c\u88c5\u9970\u5668\u63a5\u6536\u4e00\u4e2a\u51fd\u6570\u5bf9\u8c61\u4f5c\u4e3a\u53c2\u6570\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684\u51fd\u6570\u5bf9\u8c61\u3002<\/p>\n
    \u88c5\u9970\u5668\u901a\u8fc7\u540d\u79f0\u7ed1\u5b9a\uff0c\u8ba9\u540c\u4e00\u4e2a\u53d8\u91cf\u540d\u6307\u5411\u4e00\u4e2a\u65b0\u8fd4\u56de\u7684\u51fd\u6570\u5bf9\u8c61\uff0c\u8fd9\u6837\u5c31\u8fbe\u5230\u4fee\u6539\u51fd\u6570\u5bf9\u8c61\u7684\u76ee\u7684\u3002<\/p>\n
    \u5728\u4f7f\u7528\u88c5\u9970\u5668\u65f6\uff0c\u6211\u4eec\u901a\u5e38\u4f1a\u5728\u65b0\u51fd\u6570\u5185\u90e8\u8c03\u7528\u65e7\u51fd\u6570\uff0c\u4ee5\u4fdd\u7559\u65e7\u51fd\u6570\u7684\u529f\u80fd\uff0c\u8fd9\u6b63\u662f\u201c\u88c5\u9970\u201d\u4e00\u8bcd\u7684\u7531\u6765\u3002<\/p>\n
    \u5728\u5b9a\u4e49\u597d\u88c5\u9970\u5668\u4ee5\u540e\uff0c\u5c31\u53ef\u4ee5\u4f7f\u7528@\u8bed\u6cd5\u4e86\uff0c\u5176\u5b9e\u9645\u610f\u4e49\u65f6\uff0c\u5c06\u88ab\u4fee\u9970\u5bf9\u8c61\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9\u88c5\u9970\u5668\u51fd\u6570\uff0c\u7136\u540e\u5c06\u88c5\u9970\u5668\u51fd\u6570\u8fd4\u56de\u7684\u51fd\u6570\u5bf9\u8c61\u8d4b\u7ed9\u539f\u6765\u7684\u88ab\u4fee\u9970\u5bf9\u8c61\u3002<\/p>\n
    \u88c5\u9970\u5668\u53ef\u4ee5\u5b9e\u73b0\u4ee3\u7801\u7684\u53ef\u590d\u7528\u6027\uff0c\u5373\u6211\u4eec\u53ef\u4ee5\u7528\u540c\u4e00\u4e2a\u88c5\u9970\u5668\u4fee\u9970\u591a\u4e2a\u51fd\u6570\uff0c\u4ee5\u4fbf\u5b9e\u73b0\u76f8\u540c\u7684\u9644\u52a0\u529f\u80fd\u3002<\/p>\n
    \u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u5b9a\u4e49\u4e86\u4e00\u4e2adecorator_print\u7684\u88c5\u9970\u5668\u51fd\u6570\uff0c\u5b83\u8d1f\u8d23\u5bf9\u4e00\u4e2a\u51fd\u6570func\u8fdb\u884c\u4fee\u9970\uff0c\u5728\u8c03\u7528\u51fd\u6570func\u4ee5\u524d\u6267\u884cprint\u8bed\u53e5\uff0c\u8fdb\u800c\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u8c03\u8bd5\u51fd\u6570\u4e2d\u7684\u53c2\u6570\uff0c\u901a\u8fc7@\u8bed\u6cd5\u53ef\u4ee5\u8ba9\u6211\u4eec\u4f7f\u7528\u4e00\u4e2a\u540d\u79f0\u53bb\u7ed1\u5b9a\u4e00\u4e2a\u51fd\u6570\u5bf9\u8c61\u3002<\/p>\n
    \u5728\u8fd9\u91cc\uff0c\u5b83\u7684\u8c03\u7528\u8fc7\u7a0b\u53ef\u4ee5\u88ab\u5206\u89e3\u4e3a\uff1a<\/p>\n\n\n\n
    \nsum = decorator_print(sum)<\/span>\nprint sum()<\/span>\n<\/pre>\n\n\n\n
    \u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u518d\u6765\u5199\u4e00\u4e2a\u7edf\u8ba1\u4ee3\u7801\u6267\u884c\u65f6\u957f\u7684\u88c5\u9970\u5668decorator_watcher:<\/p>\n\n\n\n
    \ndef decorator_watcher(func):<\/span>\n    def wrapper(arg): <\/span>\n        t1 = time.time() <\/span>\n        result = func(arg)<\/span>\n        t2 = time.time()<\/span>\n        print('time:',t2-t1)<\/span>\n        return result<\/span>\n    return wrapper<\/span>\n<\/pre>\n\n\n\n
    \u6b64\u65f6\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u8be5\u88c5\u9970\u5668\u6765\u7edf\u8ba1sum()\u51fd\u6570\u6267\u884c\u65f6\u957f\uff1a<\/p>\n\n\n\n
    \n@decorator_watcher<\/span>\ndef sum(array):<\/span>\n    return reduce(lambda x,y:x+y,array)<\/span>\ndata = [1,3,5,7,9]<\/span>\nprint sum(data)<\/span>\n<\/pre>\n\n\n\n
    \u73b0\u5728\uff0c\u8fd9\u4e2a\u88c5\u9970\u5668\u6253\u5370\u51fa\u6765\u7684\u4fe1\u606f\u683c\u5f0f\u90fd\u662f\u4e00\u6837\u7684\uff0c\u6211\u4eec\u65e0\u6cd5\u4ece\u7ec8\u7aef\u4e2d\u5206\u8fa8\u5b83\u5bf9\u5e94\u54ea\u4e00\u4e2a\u51fd\u6570\uff0c\u56e0\u6b64\u8003\u8651\u7ed9\u5b83\u589e\u52a0\u53c2\u6570\u4ee5\u63d0\u9ad8\u8fa8\u8bc6\u5ea6\uff1a<\/p>\n\n\n\n
    \ndef decorator_watcher(funcName=''):<\/span>\n    def decorator(func):<\/span>\n        def wrapper(arg): <\/span>\n            t1 = time.time() <\/span>\n            result = func(arg)<\/span>\n            t2 = time.time()<\/span>\n            print('%s time:' % funcName,t2-t1)<\/span>\n            return result<\/span>\n        return wrapper<\/span>\n    return decorator<\/span>\n<\/span>\n@decorator_watcher('sum')<\/span>\ndef sum(array):<\/span>\n    return reduce(lambda x,y:x+y,array)<\/span>\n<\/span>\ndata = [1,3,5,7,9]<\/span>\nprint sum(data)<\/span>\n<\/pre>\n\n\n\n
    \u88c5\u9970\u5668\u540c\u6837\u53ef\u4ee5\u5bf9\u7c7b\u8fdb\u884c\u4fee\u9970\uff0c\u8b6c\u5982\u6211\u4eec\u5e0c\u671b\u67d0\u4e00\u4e2a\u7c7b\u652f\u6301\u5355\u4f8b\u6a21\u5f0f(\u5373\u53ea\u5b58\u5728\u4e00\u4e2a\u901a\u8fc7\u8be5\u7c7b\u521b\u5efa\u7684\u5b9e\u4f8b)\uff0c\u5728C#\u4e2d\u6211\u4eec\u5b9a\u4e49\u6cdb\u578b\u7c7bSingleton\u3002\u4e0b\u9762\u6f14\u793a\u5982\u4f55\u901a\u8fc7\u88c5\u9970\u5668\u6765\u5b9e\u73b0\u8fd9\u4e00\u529f\u80fd\uff1a<\/p>\n\n\n\n
    \ninstances = {}<\/span>\ndef getInstance(aClass, args): <\/span>\n    if aClass not in instances: <\/span>\n        instances[aClass] = aClass(args)<\/span>\n    return instances[aClass]<\/span>\n<\/span>\ndef singleton(aClass):<\/span>\n    def onCall(args): <\/span>\n        return getInstance(aClass,args)<\/span>\n    return onCall<\/span>\n<\/span>\n@singleton<\/span>\nclass Person:<\/span>\n    def init(self,name,hours,rate):<\/span>\n        self.name = name<\/span>\n        self.hours = hours<\/span>\n        self.rate = rate<\/span>\n    def pay(self):<\/span>\n        return self.hours * self.rate<\/span>\n<\/pre>\n\n\n\n
    \u9664\u6b64\u4ee5\u5916\uff0cPython\u6807\u51c6\u5e93\u4e2d\u63d0\u4f9b\u4e86\u8bf8\u5982classmethod\u3001staticmethod\u4ee5\u53ca\u6700\u5e38\u7528\u7684property\u7b49\u7c7b\u88c5\u9970\u5668\uff0c\u611f\u5174\u8da3\u7684\u8bfb\u8005\u670b\u53cb\u53ef\u4ee5\u81ea\u884c\u524d\u53bb\u7814\u7a76\uff0c\u8fd9\u91cc\u4e0d\u518d\u8d58\u8ff0\u3002<\/p>\n
    \u55ef\uff0c\u8fd9\u91cc\u6211\u518d\u8865\u5145\u4e00\u4e0b\u5e38\u7528\u7684property\u88c5\u9970\u5668\u7684\u4f7f\u7528\u3002<\/p>\n
      \n
    • @property\u5bf9\u5e94\u8bfb\u53d6<\/li>\n
    • @\u65b9\u6cd5\u540d.setter\u4fee\u6539<\/li>\n
    • @\u65b9\u6cd5\u540d.deleter\u5220\u9664\u5c5e\u6027<\/li>\n<\/ul>\n\n\n\n
      \nclass Goods:<\/span>\n    def init(self):<\/span>\n        self.age = 18<\/span>\n<\/span>\n@property<\/span>\ndef price(self):    # \u8bfb\u53d6<\/span>\n    return self.age<\/span>\n<\/span>\n# \u65b9\u6cd5\u540d.setter<\/span>\n@price.setter       # \u8bbe\u7f6e,\u4ec5\u53ef\u63a5\u6536\u9664self\u5916\u7684\u4e00\u4e2a\u53c2\u6570<\/span>\ndef price(self, value):<\/span>\n    self.age = value<\/span>\n<\/span>\n# \u65b9\u6cd5\u540d.deleter<\/span>\n@price.deleter      # \u5220\u9664<\/span>\ndef price(self):<\/span>\n    del self.age<\/span>\n<\/span>\n############### \u8c03\u7528<\/span>\nobj = Goods()    # \u5b9e\u4f8b\u5316\u5bf9\u8c61 <\/span>\nobj.age          # \u76f4\u63a5\u83b7\u53d6 age\u5c5e\u6027\u503c<\/span>\nobj.age= 123     #  \u4fee\u6539age\u7684\u503c<\/span>\ndel obj.age      #  \u5220\u9664age\u5c5e\u6027\u7684\u503c<\/span>\n<\/pre>\n\n\n\n
      \u00a0<\/h1>\n
      \u88c5\u9970\u5668\u4e0e\u8bbe\u8ba1\u6a21\u5f0f<\/h1>\n
      \u88c5\u9970\u5668\u53ef\u4ee5\u5bf9\u51fd\u6570\u3001\u65b9\u6cd5\u548c\u7c7b\u8fdb\u884c\u4fee\u6539\uff0c\u540c\u65f6\u4fdd\u8bc1\u539f\u6709\u529f\u80fd\u4e0d\u53d7\u5f71\u54cd\u3002\u8fd9\u81ea\u7136\u800c\u7136\u5730\u8ba9\u6211\u60f3\u5230\u9762\u5411\u5207\u9762\u7f16\u7a0b(AOP)\uff0c\u5176\u6838\u5fc3\u601d\u60f3\u662f\uff0c\u4ee5\u975e\u4fb5\u5165\u7684\u65b9\u5f0f\uff0c\u5728\u65b9\u6cd5\u6267\u884c\u524d\u540e\u63d2\u5165\u4ee3\u7801\u7247\u6bb5\uff0c\u4ee5\u6b64\u6765\u589e\u5f3a\u539f\u6709\u4ee3\u7801\u7684\u529f\u80fd\u3002<\/p>\n
      \u9762\u5411\u5207\u9762\u7f16\u7a0b(AOP)\u901a\u5e38\u901a\u8fc7\u4ee3\u7406\u6a21\u5f0f(\u9759\u6001\/\u52a8\u6001)\u6765\u5b9e\u73b0\uff0c\u800c\u4e0e\u6b64\u540c\u65f6\uff0c\u5728Gof\u63d0\u51fa\u7684\u201c\u8bbe\u8ba1\u6a21\u5f0f\u201d\u4e2d\u6709\u4e00\u79cd\u8bbe\u8ba1\u6a21\u5f0f\u88ab\u79f0\u4e3a\u88c5\u9970\u5668\u6a21\u5f0f\uff0c\u8fd9\u4e24\u79cd\u6a21\u5f0f\u7684\u76f8\u4f3c\u6027\uff0c\u8ba9\u6211\u610f\u8bc6\u5230\u8fd9\u4f1a\u662f\u4e00\u4e2a\u6709\u8da3\u7684\u8bdd\u9898\uff0c\u6240\u4ee5\u5728\u63a5\u4e0b\u6765\u7684\u90e8\u5206\uff0c\u6211\u4eec\u5c06\u8ba8\u8bba\u8fd9\u4e24\u79cd\u8bbe\u8ba1\u6a21\u5f0f\u4e0e\u88c5\u9970\u5668\u7684\u5185\u5728\u8054\u7cfb\u3002<\/p>\n
      \u00a0<\/h3>\n
      \u4ee3\u7406\u6a21\u5f0f<\/h3>\n
      \u4ee3\u7406\u6a21\u5f0f\uff0c\u5c5e\u4e8e23\u79cd\u8bbe\u8ba1\u6a21\u5f0f\u4e2d\u7684\u7ed3\u6784\u578b\u6a21\u5f0f\uff0c\u5176\u6838\u5fc3\u662f\u4e3a\u771f\u5b9e\u5bf9\u8c61\u63d0\u4f9b\u4e00\u79cd\u4ee3\u7406\u6765\u63a7\u5236\u5bf9\u8be5\u5bf9\u8c61\u7684\u8bbf\u95ee\u3002\u5728\u8fd9\u91cc\u6211\u4eec\u63d0\u5230\u4e86\u771f\u5b9e\u5bf9\u8c61\uff0c\u8fd9\u5c31\u8981\u9996\u5148\u5f15\u51fa\u4ee3\u7406\u6a21\u5f0f\u4e2d\u7684\u4e09\u79cd\u89d2\u8272\uff0c\u5373\u62bd\u8c61\u5bf9\u8c61\u3001\u4ee3\u7406\u5bf9\u8c61\u548c\u771f\u5b9e\u5bf9\u8c61\u3002\u5176\u4e2d\uff1a<\/p>\n
        \n
      • \u62bd\u8c61\u5bf9\u8c61\uff1a\u901a\u8fc7\u63a5\u53e3\u6216\u62bd\u8c61\u7c7b\u58f0\u660e\u771f\u5b9e\u89d2\u8272\u5b9e\u73b0\u7684\u4e1a\u52a1\u65b9\u6cd5\u3002<\/li>\n
      • \u4ee3\u7406\u5bf9\u8c61\uff1a\u5b9e\u73b0\u62bd\u8c61\u89d2\u8272\uff0c\u662f\u771f\u5b9e\u89d2\u8272\u7684\u4ee3\u7406\uff0c\u901a\u8fc7\u771f\u5b9e\u89d2\u8272\u7684\u4e1a\u52a1\u903b\u8f91\u65b9\u6cd5\u6765\u5b9e\u73b0\u62bd\u8c61\u65b9\u6cd5\u3002<\/li>\n
      • \u771f\u5b9e\u5bf9\u8c61\uff1a\u5b9e\u73b0\u62bd\u8c61\u89d2\u8272\uff0c\u5b9a\u4e49\u771f\u5b9e\u89d2\u8272\u6240\u8981\u5b9e\u73b0\u7684\u4e1a\u52a1\u903b\u8f91\uff0c\u4f9b\u4ee3\u7406\u89d2\u8272\u8c03\u7528\u3002<\/li>\n<\/ul>\n
        \u901a\u8fc7UML\u56fe\u6211\u4eec\u53ef\u4ee5\u53d1\u73b0\uff0c\u4ee3\u7406\u6a21\u5f0f\u901a\u8fc7\u4ee3\u7406\u5bf9\u8c61\u9690\u85cf\u4e86\u771f\u5b9e\u5bf9\u8c61\uff0c\u5b9e\u73b0\u4e86\u8c03\u7528\u8005\u5bf9\u771f\u5b9e\u5bf9\u8c61\u7684\u8bbf\u95ee\u63a7\u5236\uff0c\u5373\u8c03\u7528\u8005\u65e0\u6cd5\u76f4\u63a5\u63a5\u89e6\u5230\u771f\u5b9e\u5bf9\u8c61\u3002<\/p>\n
        \u201c\u4ee3\u7406\u201d\u8fd9\u4e2a\u8bcd\u6c47\u662f\u4e00\u4e2a\u975e\u5e38\u751f\u6d3b\u5316\u7684\u8bcd\u6c47\uff0c\u56e0\u4e3a\u6211\u4eec\u53ef\u4ee5\u975e\u5e38\u5bb9\u6613\u5730\u8054\u7cfb\u5230\u751f\u6d3b\u79cd\u7684\u4e2d\u4ecb\u8fd9\u79cd\u89d2\u8272\uff0c\u8b6c\u5982\u79df\u8d41\u623f\u5c4b\u65f6\u4f1a\u5b58\u5728\u623f\u5c4b\u4e2d\u4ecb\u8fd9\u79cd\u89d2\u8272\uff0c\u79df\u5ba2(\u8c03\u7528\u8005)\u901a\u8fc7\u4e2d\u4ecb(\u4ee3\u7406\u5bf9\u8c61)\u6765\u8054\u7cfb\u623f\u4e1c(\u771f\u5b9e\u5bf9\u8c61)\uff0c\u8fd9\u79cd\u6a21\u5f0f\u6709\u4ec0\u4e48\u597d\u5904\u5462\uff1f<\/p>\n
        \u4e2d\u4ecb(\u4ee3\u7406\u5bf9\u8c61)\u7684\u5b58\u5728\u9694\u79bb\u4e86\u79df\u5ba2(\u8c03\u7528\u8005)\u4e0e\u623f\u4e1c(\u771f\u5b9e\u5bf9\u8c61)\uff0c\u6709\u6548\u5730\u4fdd\u62a4\u4e86\u623f\u4e1c(\u771f\u5b9e\u5bf9\u8c61)\u7684\u4e2a\u4eba\u9690\u79c1\uff0c\u4f7f\u5176\u514d\u9664\u4e86\u9891\u7e41\u88ab\u79df\u5ba2(\u8c03\u7528\u8005)\u9a9a\u6270\u7684\u56f0\u60d1\uff0c\u6240\u4ee5\u4ee3\u7406\u6a21\u5f0f\u7684\u5f3a\u8c03\u7684\u662f\u63a7\u5236\u3002<\/p>\n
        \u6309\u7167\u4ee3\u7406\u673a\u5236\u4e0a\u7684\u4e0d\u540c\u6765\u5212\u5206\uff0c\u4ee3\u7406\u6a21\u5f0f\u53ef\u4ee5\u5206\u4e3a\u9759\u6001\u4ee3\u7406\u548c\u52a8\u6001\u4ee3\u7406\u3002\u524d\u8005\u662f\u5c06\u62bd\u8c61\u5bf9\u8c61\u3001\u4ee3\u7406\u5bf9\u8c61\u548c\u771f\u5b9e\u5bf9\u8c61\u8fd9\u4e09\u79cd\u89d2\u8272\u5728\u7f16\u8bd1\u65f6\u5c31\u786e\u5b9a\u4e0b\u6765\u3002<\/p>\n
        \u5bf9\u4e8eC#\u8fd9\u6837\u7684\u9759\u6001\u5f3a\u7c7b\u578b\u8bed\u8a00\u800c\u8a00\uff0c\u8fd9\u610f\u5473\u7740\u6211\u4eec\u9700\u8981\u624b\u52a8\u5b9a\u4e49\u51fa\u8fd9\u4e9b\u7c7b\u578b\uff1b\u800c\u540e\u8005\u5219\u662f\u6307\u5728\u8fd0\u884c\u65f6\u671f\u95f4\u52a8\u6001\u5730\u521b\u5efa\u4ee3\u7406\u7c7b\uff0c\u8b6c\u5982Unity\u3001Ca\u2019stle\u3001Aspect Core\u4ee5\u53caASP.NET\u4e2d\u90fd\u53ef\u4ee5\u770b\u5230\u8fd9\u79cd\u6280\u672f\u7684\u8eab\u5f71\uff0c\u5373\u6240\u8c13\u7684\u201c\u52a8\u6001\u7f16\u7ec7\u201d\u6280\u672f\uff0c\u901a\u8fc7\u53cd\u5c04\u673a\u5236\u548c\u4fee\u6539IL\u4ee3\u7801\u6765\u8fbe\u5230\u52a8\u6001\u4ee3\u7406\u7684\u76ee\u7684\u3002<\/p>\n
        \u901a\u5e38\u610f\u4e49\u4e0a\u7684\u4ee3\u7406\u6a21\u5f0f\uff0c\u90fd\u662f\u6307\u9759\u6001\u4ee3\u7406\uff0c\u4e0b\u9762\u6211\u4eec\u4e00\u8d77\u6765\u770b\u4ee3\u7801\u793a\u4f8b\uff1a<\/p>\n\n\n\n
        \npublic class RealSubject : ISubject<\/span>\n{<\/span>\n    public void Request()<\/span>\n    {<\/span>\n        Console.WriteLine("\u6211\u662fRealSubject");<\/span>\n    }<\/span>\n}<\/span>\npublic class ProxySubject : ISubject<\/span>\n{<\/span>\n    private ISubject subject;<\/span>\n<\/span>\n    public ProxySubject(ISubject subject) <\/span>\n    {     <\/span>\n        this.subject = subject; <\/span>\n    } <\/span>\n    public void Request() <\/span>\n    {     <\/span>\n         this.subject.Request(); <\/span>\n    }<\/span>\n }<\/span>\n<\/pre>\n\n\n\n
        \u901a\u8fc7\u793a\u4f8b\u4ee3\u7801\uff0c\u6211\u4eec\u53ef\u4ee5\u6ce8\u610f\u5230\uff0c\u5728\u4ee3\u7406\u5bf9\u8c61ProxySubject\u4e2d\u6301\u6709\u5bf9ISubject\u63a5\u53e3\u7684\u5f15\u7528\uff0c\u56e0\u6b64\u5b83\u53ef\u4ee5\u4ee3\u7406\u4efb\u4f55\u5b9e\u73b0\u4e86ISubject\u63a5\u53e3\u7684\u7c7b\uff0c\u5373\u771f\u5b9e\u5bf9\u8c61\u3002<\/p>\n
        \u5728Request()\u65b9\u6cd5\u4e2d\u6211\u4eec\u8c03\u7528\u4e86\u771f\u5b9e\u5bf9\u8c61\u7684Request()\u65b9\u6cd5\uff0c\u5b9e\u9645\u4e0a\u6211\u4eec\u53ef\u4ee5\u5728\u4ee3\u7406\u5bf9\u8c61\u4e2d\u589e\u52a0\u66f4\u591a\u7684\u7ec6\u8282\uff0c\u8b6c\u5982\u5728Request()\u65b9\u6cd5\u6267\u884c\u524d\u540e\u63d2\u5165\u6307\u5b9a\u7684\u4ee3\u7801\uff0c\u8fd9\u5c31\u662f\u9762\u5411\u5207\u9762\u7f16\u7a0b(AOP)\u7684\u6700\u57fa\u672c\u7684\u539f\u7406\u3002<\/p>\n
        \u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u4e3b\u8981\u4ee5\u52a8\u6001\u4ee3\u7406\u6700\u4e3a\u5e38\u89c1\uff0cJava\u4e2d\u63d0\u4f9b\u4e86InvocationHandler\u63a5\u53e3\u6765\u5b9e\u73b0\u8fd9\u4e00\u63a5\u53e3\uff0c\u5728.NET\u4e2d\u5219\u6709\u8fdc\u7a0b\u8c03\u7528(Remoting Proxies)\u3001ContextBoundObject\u548cIL\u7ec7\u5165\u7b49\u591a\u79cd\u5b9e\u73b0\u65b9\u5f0f\u3002<\/p>\n
        \u4ece\u6574\u4f53\u800c\u8a00\uff0c\u751f\u6210\u4ee3\u7406\u7c7b\u548c\u5b50\u7c7b\u5316\u662f\u5e38\u89c1\u7684\u4e24\u79cd\u601d\u8def\u3002\u76f8\u6bd4\u9759\u6001\u4ee3\u7406\uff0c\u52a8\u6001\u4ee3\u7406\u673a\u5236\u76f8\u5bf9\u590d\u6742\uff0c\u4e0d\u9002\u5408\u5728\u8fd9\u91cc\u5c55\u5f00\u6765\u8bf4\uff0c\u611f\u5174\u8da3\u7684\u670b\u53cb\u53ef\u4ee5\u53bb\u505a\u8fdb\u4e00\u6b65\u7684\u4e86\u89e3\u3002<\/p>\n
        \u00a0<\/h3>\n
        \u88c5\u9970\u5668\u6a21\u5f0f<\/h3>\n
        \u88c5\u9970\u5668\u6a21\u5f0f\uff0c\u540c\u6837\u662f\u4e00\u79cd\u7ed3\u6784\u578b\u6a21\u5f0f\uff0c\u5176\u6838\u5fc3\u662f\u4e3a\u4e86\u89e3\u51b3\u7531\u7ee7\u627f\u5f15\u53d1\u7684\u201c\u7c7b\u578b\u7206\u70b8\u201d\u95ee\u9898\u3002\u6211\u4eec\u77e5\u9053\uff0c\u901a\u8fc7\u7ee7\u627f\u589e\u52a0\u5b50\u7c7b\u5c31\u53ef\u4ee5\u6269\u5c55\u7236\u7c7b\u7684\u529f\u80fd\uff0c\u53ef\u968f\u7740\u4e1a\u52a1\u590d\u6742\u6027\u7684\u4e0d\u65ad\u589e\u52a0\uff0c\u5b50\u7c7b\u53d8\u5f97\u8d8a\u6765\u8d8a\u591a\uff0c\u8fd9\u5c31\u4f1a\u5f15\u53d1\u201c\u7c7b\u578b\u7206\u70b8\u201d\u95ee\u9898\u3002<\/p>\n
        \u88c5\u9970\u5668\u6a21\u5f0f\u5c31\u662f\u4e00\u79cd\u7528\u4ee5\u4ee3\u66ff\u7ee7\u627f\u7684\u6280\u672f\uff0c\u5373\u65e0\u9700\u901a\u8fc7\u7ee7\u627f\u589e\u52a0\u5b50\u7c7b\u5c31\u53ef\u4ee5\u6269\u5c55\u7236\u7c7b\u7684\u529f\u80fd\uff0c\u540c\u65f6\u4e0d\u6539\u53d8\u539f\u6709\u7684\u7ed3\u6784\u3002\u5728\u300a\u897f\u6e38\u8bb0\u300b\u4e2d\u5b59\u609f\u7a7a\u548c\u4e8c\u90ce\u795e\u6597\u6cd5\uff0c\u5b59\u609f\u7a7a\u53d8\u6210\u4e86\u4e00\u5ea7\u5e99\u5b87\uff0c\u8fd9\u662f\u5bf9\u539f\u6709\u529f\u80fd\u7684\u4e00\u79cd\u6269\u5c55\uff0c\u56e0\u4e3a\u5b59\u609f\u7a7a\u7684\u672c\u8d28\u4f9d\u7136\u662f\u53ea\u7334\u5b50\uff0c\u4e0d\u540c\u7684\u662f\u6b64\u523b\u5177\u5907\u4e86\u5e99\u5b87\u7684\u529f\u80fd\u3002\u8fd9\u5c31\u662f\u88c5\u9970\u5668\u6a21\u5f0f\u3002<\/p>\n
        \u4e0b\u9762\uff0c\u6211\u4eec\u4e00\u8d77\u6765\u770b\u4e00\u4e2a\u751f\u6d3b\u4e2d\u7684\u4f8b\u5b50\u3002<\/p>\n
        \u559c\u6b22\u559d\u5496\u5561\u7684\u670b\u53cb\uff0c\u770b\u5230\u8fd9\u5f20\u56fe\u5e94\u8be5\u611f\u5230\u7279\u522b\u4eb2\u5207\uff0c\u56e0\u4e3a\u5496\u5561\u7684\u79cd\u7c7b\u7684\u786e\u662f\u592a\u591a\u5566\u3002\u5728\u5f00\u59cb\u559d\u5496\u5561\u4ee5\u524d\uff0c\u6211\u5b8c\u5168\u4e0d\u77e5\u9053\u5496\u5561\u4f1a\u6709\u8fd9\u4e48\u591a\u7684\u79cd\u7c7b\uff0c\u800c\u4e14\u5496\u5561\u4f5c\u4e3a\u4e00\u79cd\u7565\u663e\u5c0f\u8d44\u7684\u996e\u54c1\uff0c\u5176\u540d\u79f0\u66f4\u662f\u4ee4\u4eba\u76ee\u4e0d\u6687\u63a5\uff0c\u4e00\u5982\u8857\u5934\u51fa\u73b0\u7684\u5404\u79cd\u5973\u5b69\u5b50\u559c\u6b22\u7684\u8336\u54c1\u996e\u6599\uff0c\u6709\u4e9b\u5f53\u771f\u662f\u6559\u4eba\u53eb\u4e0d\u51fa\u6765\u540d\u5b57\u3002<\/p>\n
        \u8fd9\u662f\u4e00\u4e2a\u5178\u578b\u7684\u201c\u7c7b\u578b\u7206\u70b8\u201d\u95ee\u9898\uff0c\u4eba\u4eec\u5728\u5403\u559d\u4e0a\u575a\u6301\u4e0d\u61c8\u7684\u8ffd\u6c42\uff0c\u8ba9\u5496\u5561\u7684\u79cd\u7c7b\u8d8a\u6765\u8d8a\u591a\uff0c\u8fd9\u4e2a\u65f6\u5019\u7ee7\u627f\u53cd\u800c\u53d8\u6210\u4e86\u4e00\u79cd\u6c89\u91cd\u7684\u5305\u88b1\uff0c\u90a3\u4e48\u8be5\u5982\u4f55\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u5462\uff1f\u88c5\u9970\u5668\u6a21\u5f0f\u5e94\u8fd0\u800c\u751f\uff0c\u9996\u5148\u6765\u770b\u88c5\u9970\u5668\u6a21\u5f0f\u7684UML\u56fe\u793a\uff1a<\/p>\n
        \u4ece\u8fd9\u4e2a\u56fe\u793a\u4e2d\u53ef\u4ee5\u770b\u51fa\uff0c\u88c5\u9970\u5668\u548c\u88ab\u88c5\u9970\u8005\u90fd\u6d3e\u751f\u81ea\u540c\u4e00\u4e2a\u62bd\u8c61\u7c7bComponent\uff0c\u800c\u4e0d\u540c\u7684Decorator\u5177\u5907\u4e0d\u540c\u7684\u529f\u80fd\uff0cDecoratorA\u53ef\u4ee5\u4e3a\u88ab\u88c5\u9970\u8005\u6269\u5c55\u72b6\u6001\uff0cDecoratorB\u53ef\u4ee5\u4e3a\u88ab\u88c5\u9970\u8005\u6269\u5c55\u884c\u4e3a\uff0c\u53ef\u65e0\u8bba\u5982\u4f55\uff0c\u88ab\u88c5\u9970\u8005\u7684\u672c\u8d28\u4e0d\u4f1a\u53d1\u751f\u53d8\u5316\uff0c\u5b83\u8fd8\u662f\u4e00\u4e2aComponent\u3002<\/p>\n
        \u56de\u5230\u5496\u5561\u8fd9\u4e2a\u95ee\u9898\uff0c\u6211\u4eec\u53d1\u73b0\u8fd9\u4e9b\u5496\u5561\u90fd\u662f\u7531\u6d53\u7f29\u5496\u5561\u3001\u6c34\u3001\u725b\u5976\u3001\u5976\u6ce1\u7b49\u7ec4\u6210\uff0c\u6240\u4ee5\u6211\u4eec\u53ef\u4ee5\u4ece\u4e00\u676f\u6d53\u7f29\u5496\u5561\u5f00\u59cb\uff0c\u5bf9\u5496\u5561\u53cd\u590d\u8fdb\u884c\u8c03\u914d\uff0c\u76f4\u81f3\u642d\u914d\u51fa\u6211\u4eec\u559c\u6b22\u7684\u5496\u5561\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u5c31\u662f\u53cd\u590d\u4f7f\u7528\u88c5\u9970\u5668\u8fdb\u884c\u88c5\u9970\u7684\u8fc7\u7a0b\uff0c\u56e0\u6b64\u6211\u4eec\u53ef\u4ee5\u5199\u51fa\u4e0b\u9762\u7684\u4ee3\u7801\uff1a<\/p>\n\n\n\n
        \n\/\/\u996e\u6599\u62bd\u8c61\u7c7b<\/span>\nabstract class Drink<\/span>\n{<\/span>\n    public abstract Drink Mix(Drink drink);<\/span>\n}<\/span>\n\/\/\u725b\u5976\u88c5\u9970\u5668<\/span>\nclass MilkDecorator : Drink<\/span>\n{<\/span>\n    private Drink milk;<\/span>\n    MilkDecorator(Drink milk)<\/span>\n    {<\/span>\n        this.milk = milk;<\/span>\n    }<\/span>\n    public override Drink Mix(Drink coffee) <\/span>\n    { <\/span>\n        return coffee.Mix(this.milk); <\/span>\n    }<\/span>\n}<\/span>\n\/\/\u70ed\u6c34\u88c5\u9970\u5668<\/span>\nclass WaterDecorator : Drink<\/span>\n{<\/span>\n    private Drink water;<\/span>\n    WaterDecorator(Drink water)<\/span>\n    {<\/span>\n        this.water = water;<\/span>\n    }<\/span>\n    public override Drink Mix(Drink coffee)<\/span>\n    {    <\/span>\n        return coffee.Mix(this.water); <\/span>\n    }<\/span>\n}<\/span>\n\/\/\u4e00\u676f\u6d53\u7f29\u5496\u5561<\/span>\nvar coffee = new Coffee()<\/span>\n\/\/\u5496\u5561\u91cc\u6df7\u5165\u6c34<\/span>\ncoffee = new WaterDecorator(new Water()).Mix(coffee)<\/span>\n\/\/\u5496\u5561\u91cc\u6df7\u5165\u725b\u5976<\/span>\ncoffee = new MilkDecorator(new Milk()).Mix(coffee)<\/span>\n<\/pre>\n\n\n\n
        \u5728\u8fd9\u91cc\u6211\u4eec\u6f14\u793a\u4e86\u5982\u4f55\u901a\u8fc7\u88c5\u9970\u5668\u6a21\u5f0f\u6765\u8c03\u914d\u51fa\u4e00\u676f\u5496\u5561\uff0c\u8fd9\u91cc\u6211\u6ca1\u6709\u5199\u51fa\u5177\u4f53\u7684Coffee\u7c7b\u3002<\/p>\n
        \u5728\u5b9e\u9645\u573a\u666f\u4e2d\uff0c\u6211\u4eec\u8fd8\u4f1a\u9047\u5230\u5728\u5496\u5561\u91cc\u52a0\u7cd6\u6216\u8005\u914d\u6599\u6765\u6536\u8d39\u7684\u95ee\u9898\uff0c\u6b64\u65f6\u88c5\u9970\u5668\u6a21\u5f0f\u5c31\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u89e3\u51b3\u95ee\u9898\uff0c\u4e0d\u540c\u7684\u88c5\u9970\u5668\u4f1a\u5bf9\u5496\u5561\u7684\u4ef7\u683c\u8fdb\u884c\u4fee\u6539\uff0c\u56e0\u6b64\u5728\u5e94\u7528\u5b8c\u6240\u6709\u88c5\u9970\u5668\u4ee5\u540e\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u8ba1\u7b97\u51fa\u6700\u7ec8\u8fd9\u676f\u5496\u5561\u7684\u4ef7\u683c\u3002<\/p>\n
        \u7531\u6b64\u6211\u4eec\u53ef\u4ee5\u770b\u51fa\uff0c\u88c5\u9970\u5668\u6a21\u5f0f\u5f3a\u8c03\u7684\u662f\u6269\u5c55\u3002\u4ec0\u4e48\u662f\u6269\u5c55\u5462\uff0c\u5c31\u662f\u5728\u4e0d\u5f71\u54cd\u539f\u6765\u529f\u80fd\u7684\u57fa\u7840\u4e0a\u589e\u52a0\u65b0\u7684\u529f\u80fd\u3002<\/p>\n
        \u00a0<\/h3>\n
        \u533a\u522b\u548c\u8054\u7cfb<\/h3>\n
        \u4ee3\u7406\u6a21\u5f0f\u548c\u88c5\u9970\u5668\u6a21\u5f0f\u90fd\u662f\u7ed3\u6784\u578b\u7684\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u4e24\u8005\u5728\u5b9e\u73b0\u4e0a\u662f\u975e\u5e38\u76f8\u4f3c\u7684\u3002<\/p>\n
        \u4e0d\u540c\u7684\u5730\u65b9\u5728\u4e8e\uff0c\u4ee3\u7406\u6a21\u5f0f\u4e0b\u8c03\u7528\u8005\u65e0\u6cd5\u76f4\u63a5\u63a5\u89e6\u5230\u771f\u5b9e\u5bf9\u8c61\uff0c\u56e0\u6b64\u4ee3\u7406\u6a21\u5f0f\u5f3a\u8c03\u7684\u662f\u63a7\u5236\uff0c\u5373\u5411\u8c03\u7528\u8005\u9690\u85cf\u771f\u5b9e\u5bf9\u8c61\u7684\u4fe1\u606f\uff0c\u63a7\u5236\u771f\u5b9e\u5bf9\u8c61\u53ef\u4ee5\u8bbf\u95ee\u7684\u8303\u56f4\u3002<\/p>\n
        \u88c5\u9970\u5668\u6a21\u5f0f\u4e0b\uff0c\u6269\u5c55\u529f\u80fd\u7684\u804c\u8d23\u7531\u5b50\u7c7b\u8f6c\u5411\u88c5\u9970\u5668\uff0c\u4e14\u88c5\u9970\u5668\u4e0e\u88ab\u88c5\u9970\u8005\u901a\u5e38\u662f\u201c\u540c\u6e90\u201d\u7684\uff0c\u5373\u6d3e\u751f\u81ea\u540c\u4e00\u4e2a\u7236\u7c7b\u6216\u8005\u662f\u5b9e\u73b0\u4e86\u540c\u4e00\u4e2a\u63a5\u53e3\uff0c\u88c5\u9970\u5668\u5173\u6ce8\u7684\u662f\u589e\u52a0\u88ab\u88c5\u9970\u8005\u7684\u529f\u80fd\uff0c\u5373\u6269\u5c55\u3002<\/p>\n
        \u4e24\u8005\u7684\u8054\u7cfb\u5728\u4e8e\u90fd\u9700\u8981\u6301\u6709\u4e00\u4e2a\u201c\u540c\u6e90\u201d\u5bf9\u8c61\u7684\u5f15\u7528\uff0c\u8b6c\u5982\u4ee3\u7406\u5bf9\u8c61\u4e0e\u771f\u5b9e\u5bf9\u8c61\u540c\u6e90\uff0c\u88c5\u9970\u5668\u4e0e\u88ab\u88c5\u9970\u8005\u540c\u6e90\u3002<\/p>\n
        \u4ece\u8c03\u7528\u7684\u5c42\u9762\u4e0a\u6765\u8bb2\uff0c\u8c03\u7528\u8005\u65e0\u6cd5\u63a5\u89e6\u5230\u771f\u5b9e\u5bf9\u8c61\uff0c\u5b83\u8c03\u7528\u7684\u59cb\u7ec8\u662f\u4ee3\u7406\u5bf9\u8c61\uff0c\u5bf9\u771f\u5b9e\u5bf9\u8c61\u7684\u5185\u90e8\u7ec6\u8282\u4e00\u65e0\u6240\u77e5\uff0c\u8fd9\u662f\u4ee3\u7406\u6a21\u5f0f\uff1b\u8c03\u7528\u8005\u53ef\u4ee5\u63a5\u89e6\u5230\u88c5\u9970\u5668\u548c\u88ab\u88c5\u9970\u8005\uff0c\u5e76\u4e14\u77e5\u9053\u88c5\u9970\u5668\u4f1a\u5bf9\u88ab\u88c5\u9970\u8005\u4ea7\u751f\u4ec0\u4e48\u6837\u7684\u5f71\u54cd\uff0c\u901a\u5e38\u662f\u4ece\u4e00\u4e2a\u9ed8\u8ba4\u7684\u5bf9\u8c61\u5f00\u59cb\u201d\u52a0\u5de5\u201d\uff0c\u8fd9\u662f\u88c5\u9970\u5668\u6a21\u5f0f\u3002<\/p>\n
        \u00a0<\/h1>\n
        \u88c5\u9970\u5668\u4e0e\u9762\u5411\u5207\u9762<\/h1>\n
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        \u00a0<\/p>\n\n\n\n
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