{"id":2036,"date":"2023-05-04T06:30:08","date_gmt":"2023-05-03T22:30:08","guid":{"rendered":"https:\/\/xinchewhd.com.cn\/?p=2036"},"modified":"2023-05-28T10:21:38","modified_gmt":"2023-05-28T02:21:38","slug":"%e8%af%a6%e8%a7%a3%e8%ae%be%e8%ae%a1%e6%a8%a1%e5%bc%8f%ef%bc%88%e5%a4%9a%e5%9b%be-%e4%bb%a3%e7%a0%81%ef%bc%89","status":"publish","type":"post","link":"https:\/\/xinchewhd.com.cn\/index.php\/java\/%e8%af%a6%e8%a7%a3%e8%ae%be%e8%ae%a1%e6%a8%a1%e5%bc%8f%ef%bc%88%e5%a4%9a%e5%9b%be-%e4%bb%a3%e7%a0%81%ef%bc%89\/","title":{"rendered":"\u8be6\u89e3\u8bbe\u8ba1\u6a21\u5f0f\uff08\u591a\u56fe + \u4ee3\u7801\uff09"},"content":{"rendered":"
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\u200b<\/span>\u8bbe\u8ba1\u6a21\u5f0f<\/strong>\u662f\u5bf9\u5927\u5bb6\u5b9e\u9645\u5de5\u4f5c\u4e2d\u5199\u7684\u5404\u79cd\u4ee3\u7801\u8fdb\u884c\u9ad8\u5c42\u6b21\u62bd\u8c61\u7684\u603b\u7ed3\uff0c\u5176\u4e2d\u6700\u51fa\u540d\u7684\u5f53\u5c5e<\/span> <\/span>Gang of Four<\/em> <\/span>(<\/span>GoF<\/em>) \u7684\u5206\u7c7b\u4e86\uff0c\u4ed6\u4eec\u5c06\u8bbe\u8ba1\u6a21\u5f0f\u5206\u7c7b\u4e3a 23 \u79cd\u7ecf\u5178\u7684\u6a21\u5f0f\uff0c\u6839\u636e\u7528\u9014\u6211\u4eec\u53c8\u53ef\u4ee5\u5206\u4e3a\u4e09\u5927\u7c7b\uff0c\u5206\u522b\u4e3a\u521b\u5efa\u578b\u6a21\u5f0f\u3001\u7ed3\u6784\u578b\u6a21\u5f0f\u548c\u884c\u4e3a\u578b\u6a21\u5f0f\u3002<\/span><\/p>\n

\u6709\u4e00\u4e9b\u91cd\u8981\u7684\u8bbe\u8ba1\u539f\u5219\u5728\u5f00\u7bc7\u548c\u5927\u5bb6\u5206\u4eab\u4e0b\uff0c\u8fd9\u4e9b\u539f\u5219\u5c06\u8d2f\u901a\u5168\u6587\uff1a<\/p>\n

    \n
  1. \n
    \u9762\u5411\u63a5\u53e3\u7f16\u7a0b\uff0c\u800c\u4e0d\u662f\u9762\u5411\u5b9e\u73b0\u3002\u8fd9\u4e2a\u5f88\u91cd\u8981\uff0c\u4e5f\u662f\u4f18\u96c5\u7684\u3001\u53ef\u6269\u5c55\u7684\u4ee3\u7801\u7684\u7b2c\u4e00\u6b65\uff0c\u8fd9\u5c31\u4e0d\u9700\u8981\u591a\u8bf4\u4e86\u5427\u3002<\/section>\n<\/li>\n
  2. \n
    \u804c\u8d23\u5355\u4e00\u539f\u5219\u3002\u6bcf\u4e2a\u7c7b\u90fd\u5e94\u8be5\u53ea\u6709\u4e00\u4e2a\u5355\u4e00\u7684\u529f\u80fd\uff0c\u5e76\u4e14\u8be5\u529f\u80fd\u5e94\u8be5\u7531\u8fd9\u4e2a\u7c7b\u5b8c\u5168\u5c01\u88c5\u8d77\u6765\u3002<\/section>\n<\/li>\n
  3. \n
    \u5bf9\u4fee\u6539\u5173\u95ed\uff0c\u5bf9\u6269\u5c55\u5f00\u653e\u3002\u5bf9\u4fee\u6539\u5173\u95ed\u662f\u8bf4\uff0c\u6211\u4eec\u8f9b\u8f9b\u82e6\u82e6\u52a0\u73ed\u5199\u51fa\u6765\u7684\u4ee3\u7801\uff0c\u8be5\u5b9e\u73b0\u7684\u529f\u80fd\u548c\u8be5\u4fee\u590d\u7684 bug \u90fd\u5b8c\u6210\u4e86\uff0c\u522b\u4eba\u53ef\u4e0d\u80fd\u8bf4\u6539\u5c31\u6539\uff1b\u5bf9\u6269\u5c55\u5f00\u653e\u5c31\u6bd4\u8f83\u597d\u7406\u89e3\u4e86\uff0c\u4e5f\u5c31\u662f\u8bf4\u5728\u6211\u4eec\u5199\u597d\u7684\u4ee3\u7801\u57fa\u7840\u4e0a\uff0c\u5f88\u5bb9\u6613\u5b9e\u73b0\u6269\u5c55\u3002<\/section>\n<\/li>\n<\/ol>\n

    \u521b\u5efa\u578b\u6a21\u5f0f\u6bd4\u8f83\u7b80\u5355\uff0c\u4f46\u662f\u4f1a\u6bd4\u8f83\u6ca1\u6709\u610f\u601d\uff0c\u7ed3\u6784\u578b\u548c\u884c\u4e3a\u578b\u6bd4\u8f83\u6709\u610f\u601d\u3002<\/strong><\/p>\n


    <\/strong><\/p>\n

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    \u521b\u5efa\u578b\u6a21\u5f0f<\/span><\/strong><\/span><\/p>\n<\/section>\n

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    <\/section>\n

    <\/section>\n
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    <\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/blockquote>\n<\/section>\n<\/section>\n<\/blockquote>\n<\/section>\n


    <\/p>\n

    \u521b\u5efa\u578b\u6a21\u5f0f\u7684\u4f5c\u7528\u5c31\u662f\u521b\u5efa\u5bf9\u8c61\uff0c\u8bf4\u5230\u521b\u5efa\u4e00\u4e2a\u5bf9\u8c61\uff0c\u6700\u719f\u6089\u7684\u5c31\u662f new \u4e00\u4e2a\u5bf9\u8c61\uff0c\u7136\u540e set \u76f8\u5173\u5c5e\u6027\u3002\u4f46\u662f\uff0c\u5728\u5f88\u591a\u573a\u666f\u4e0b\uff0c\u6211\u4eec\u9700\u8981\u7ed9\u5ba2\u6237\u7aef\u63d0\u4f9b\u66f4\u52a0\u53cb\u597d\u7684\u521b\u5efa\u5bf9\u8c61\u7684\u65b9\u5f0f\uff0c\u5c24\u5176\u662f\u90a3\u79cd\u6211\u4eec\u5b9a\u4e49\u4e86\u7c7b\uff0c\u4f46\u662f\u9700\u8981\u63d0\u4f9b\u7ed9\u5176\u4ed6\u5f00\u53d1\u8005\u7528\u7684\u65f6\u5019\u3002<\/p>\n


    <\/h3>\n
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    \u7b80\u5355\u5de5\u5382\u6a21\u5f0f<\/span><\/p>\n<\/section>\n


    <\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n

    \u548c\u540d\u5b57\u4e00\u6837\u7b80\u5355\uff0c\u975e\u5e38\u7b80\u5355\uff0c\u76f4\u63a5\u4e0a\u4ee3\u7801\u5427\uff1a<\/span>
    <\/p>\n

    <\/span>public<\/span> class<\/span> FoodFactory<\/span> <\/span>{

        public<\/span> static<\/span> Food makeFood<\/span>(String name)<\/span> <\/span>{
            if<\/span> (name.equals(\"noodle\"<\/span>)) {
                Food noodle = new<\/span> LanZhouNoodle();
                noodle.addSpicy(\"more\"<\/span>);
                return<\/span> noodle;
            } else<\/span> if<\/span> (name.equals(\"chicken\"<\/span>)) {
                Food chicken = new<\/span> HuangMenChicken();
                chicken.addCondiment(\"potato\"<\/span>);
                return<\/span> chicken;
            } else<\/span> {
                return<\/span> null<\/span>;
            }
        }
    }
    <\/code><\/pre>\n
    \u5176\u4e2d\uff0cLanZhouNoodle \u548c HuangMenChicken \u90fd\u7ee7\u627f\u81ea Food\u3002<\/em><\/p>\n
    \u7b80\u5355\u5730\u8bf4\uff0c\u7b80\u5355\u5de5\u5382\u6a21\u5f0f\u901a\u5e38\u5c31\u662f\u8fd9\u6837\uff0c\u4e00\u4e2a\u5de5\u5382\u7c7b XxxFactory\uff0c\u91cc\u9762\u6709\u4e00\u4e2a\u9759\u6001\u65b9\u6cd5\uff0c\u6839\u636e\u6211\u4eec\u4e0d\u540c\u7684\u53c2\u6570\uff0c\u8fd4\u56de\u4e0d\u540c\u7684\u6d3e\u751f\u81ea\u540c\u4e00\u4e2a\u7236\u7c7b\uff08\u6216\u5b9e\u73b0\u540c\u4e00\u63a5\u53e3\uff09\u7684\u5b9e\u4f8b\u5bf9\u8c61\u3002<\/p>\n
    \n
    \u6211\u4eec\u5f3a\u8c03\u804c\u8d23\u5355\u4e00<\/strong> <\/span>\u539f\u5219\uff0c\u4e00\u4e2a\u7c7b\u53ea\u63d0\u4f9b\u4e00\u79cd\u529f\u80fd\uff0cFoodFactory \u7684\u529f\u80fd\u5c31\u662f\u53ea\u8981\u8d1f\u8d23\u751f\u4ea7\u5404\u79cd Food\u3002<\/p>\n<\/blockquote>\n

    <\/h3>\n
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    \u5de5\u5382\u6a21\u5f0f<\/span><\/p>\n<\/section>\n

    <\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u7b80\u5355\u5de5\u5382\u6a21\u5f0f\u5f88\u7b80\u5355\uff0c\u5982\u679c\u5b83\u80fd\u6ee1\u8db3\u6211\u4eec\u7684\u9700\u8981\uff0c\u6211\u89c9\u5f97\u5c31\u4e0d\u8981\u6298\u817e\u4e86\u3002\u4e4b\u6240\u4ee5\u9700\u8981\u5f15\u5165\u5de5\u5382\u6a21\u5f0f\uff0c\u662f\u56e0\u4e3a\u6211\u4eec\u5f80\u5f80\u9700\u8981\u4f7f\u7528\u4e24\u4e2a\u6216\u4e24\u4e2a\u4ee5\u4e0a\u7684\u5de5\u5382\u3002<\/span>
    <\/p>\n
    <\/span>public<\/span> interface<\/span> FoodFactory<\/span> <\/span>{
        Food makeFood<\/span>(String name)<\/span><\/span>;
    }
    public<\/span> class<\/span> ChineseFoodFactory<\/span> implements<\/span> FoodFactory<\/span> <\/span>{

        @Override<\/span>
        public<\/span> Food makeFood<\/span>(String name)<\/span> <\/span>{
            if<\/span> (name.equals(\"A\"<\/span>)) {
                return<\/span> new<\/span> ChineseFoodA();
            } else<\/span> if<\/span> (name.equals(\"B\"<\/span>)) {
                return<\/span> new<\/span> ChineseFoodB();
            } else<\/span> {
                return<\/span> null<\/span>;
            }
        }
    }
    public<\/span> class<\/span> AmericanFoodFactory<\/span> implements<\/span> FoodFactory<\/span> <\/span>{

        @Override<\/span>
        public<\/span> Food makeFood<\/span>(String name)<\/span> <\/span>{
            if<\/span> (name.equals(\"A\"<\/span>)) {
                return<\/span> new<\/span> AmericanFoodA();
            } else<\/span> if<\/span> (name.equals(\"B\"<\/span>)) {
                return<\/span> new<\/span> AmericanFoodB();
            } else<\/span> {
                return<\/span> null<\/span>;
            }
        }
    }
    <\/code><\/pre>\n
    \u5176\u4e2d\uff0cChineseFoodA\u3001ChineseFoodB\u3001AmericanFoodA\u3001AmericanFoodB \u90fd\u6d3e\u751f\u81ea Food\u3002<\/p>\n
    \u5ba2\u6237\u7aef\u8c03\u7528\uff1a<\/p>\n
    <\/span>public<\/span> class<\/span> APP<\/span> <\/span>{
        public<\/span> static<\/span> void<\/span> main<\/span>(String[] args)<\/span> <\/span>{
            \/\/ \u5148\u9009\u62e9\u4e00\u4e2a\u5177\u4f53\u7684\u5de5\u5382<\/span>
            FoodFactory factory = new<\/span> ChineseFoodFactory();
            \/\/ \u7531\u7b2c\u4e00\u6b65\u7684\u5de5\u5382\u4ea7\u751f\u5177\u4f53\u7684\u5bf9\u8c61\uff0c\u4e0d\u540c\u7684\u5de5\u5382\u9020\u51fa\u4e0d\u4e00\u6837\u7684\u5bf9\u8c61<\/span>
            Food food = factory.makeFood(\"A\"<\/span>);
        }
    }
    <\/code><\/pre>\n
    \u867d\u7136\u90fd\u662f\u8c03\u7528 makeFood(\"A\")  \u5236\u4f5c A \u7c7b\u98df\u7269\uff0c\u4f46\u662f\uff0c\u4e0d\u540c\u7684\u5de5\u5382\u751f\u4ea7\u51fa\u6765\u7684\u5b8c\u5168\u4e0d\u4e00\u6837\u3002<\/p>\n
    \u7b2c\u4e00\u6b65\uff0c\u6211\u4eec\u9700\u8981\u9009\u53d6\u5408\u9002\u7684\u5de5\u5382\uff0c\u7136\u540e\u7b2c\u4e8c\u6b65\u57fa\u672c\u4e0a\u548c\u7b80\u5355\u5de5\u5382\u4e00\u6837\u3002<\/p>\n
    \u6838\u5fc3\u5728\u4e8e\uff0c\u6211\u4eec\u9700\u8981\u5728\u7b2c\u4e00\u6b65\u9009\u597d\u6211\u4eec\u9700\u8981\u7684\u5de5\u5382<\/strong> <\/span>\u3002\u6bd4\u5982\uff0c\u6211\u4eec\u6709 LogFactory \u63a5\u53e3\uff0c\u5b9e\u73b0\u7c7b\u6709 FileLogFactory \u548c KafkaLogFactory\uff0c\u5206\u522b\u5bf9\u5e94\u5c06\u65e5\u5fd7\u5199\u5165\u6587\u4ef6\u548c\u5199\u5165 Kafka \u4e2d\uff0c\u663e\u7136\uff0c\u6211\u4eec\u5ba2\u6237\u7aef\u7b2c\u4e00\u6b65\u5c31\u9700\u8981\u51b3\u5b9a\u5230\u5e95\u8981\u5b9e\u4f8b\u5316 FileLogFactory \u8fd8\u662f KafkaLogFactory\uff0c\u8fd9\u5c06\u51b3\u5b9a\u4e4b\u540e\u7684\u6240\u6709\u7684\u64cd\u4f5c\u3002<\/p>\n
    \u867d\u7136\u7b80\u5355\uff0c\u4e0d\u8fc7\u6211\u4e5f\u628a\u6240\u6709\u7684\u6784\u4ef6\u90fd\u753b\u5230\u4e00\u5f20\u56fe\u4e0a\uff0c\u8fd9\u6837\u8bfb\u8005\u770b\u7740\u6bd4\u8f83\u6e05\u6670\uff1a<\/p>\n

    <\/p>\n

    <\/h3>\n
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    \u62bd\u8c61\u5de5\u5382\u6a21\u5f0f<\/span><\/p>\n<\/section>\n

    <\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n
    \u5f53\u6d89\u53ca\u5230<\/span>\u4ea7\u54c1\u65cf<\/strong> <\/span>\u7684\u65f6\u5019\uff0c\u5c31\u9700\u8981\u5f15\u5165\u62bd\u8c61\u5de5\u5382\u6a21\u5f0f\u4e86\u3002<\/span>
    <\/p>\n
    \u4e00\u4e2a\u7ecf\u5178\u7684\u4f8b\u5b50\u662f\u9020\u4e00\u53f0\u7535\u8111\u3002\u6211\u4eec\u5148\u4e0d\u5f15\u5165\u62bd\u8c61\u5de5\u5382\u6a21\u5f0f\uff0c\u770b\u770b\u600e\u4e48\u5b9e\u73b0\u3002<\/p>\n
    \u56e0\u4e3a\u7535\u8111\u662f\u7531\u8bb8\u591a\u7684\u6784\u4ef6\u7ec4\u6210\u7684\uff0c\u6211\u4eec\u5c06 CPU \u548c\u4e3b\u677f\u8fdb\u884c\u62bd\u8c61\uff0c\u7136\u540e CPU \u7531 CPUFactory \u751f\u4ea7\uff0c\u4e3b\u677f\u7531 MainBoardFactory \u751f\u4ea7\uff0c\u7136\u540e\uff0c\u6211\u4eec\u518d\u5c06 CPU \u548c\u4e3b\u677f\u642d\u914d\u8d77\u6765\u7ec4\u5408\u5728\u4e00\u8d77\uff0c\u5982\u4e0b\u56fe\uff1a<\/p>\n
    \u8fd9\u4e2a\u65f6\u5019\u7684\u5ba2\u6237\u7aef\u8c03\u7528\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n
    <\/span>\/\/ \u5f97\u5230 Intel \u7684 CPU<\/span>
    CPUFactory cpuFactory = new<\/span> IntelCPUFactory();
    CPU cpu = intelCPUFactory.makeCPU();

    \/\/ \u5f97\u5230 AMD \u7684\u4e3b\u677f<\/span>
    MainBoardFactory mainBoardFactory = new<\/span> AmdMainBoardFactory();
    MainBoard mainBoard = mainBoardFactory.make();

    \/\/ \u7ec4\u88c5 CPU \u548c\u4e3b\u677f<\/span>
    Computer computer = new<\/span> Computer(cpu, mainBoard);
    <\/code><\/pre>\n
    \u5355\u72ec\u770b CPU \u5de5\u5382\u548c\u4e3b\u677f\u5de5\u5382\uff0c\u5b83\u4eec\u5206\u522b\u662f\u524d\u9762\u6211\u4eec\u8bf4\u7684\u5de5\u5382\u6a21\u5f0f<\/strong> <\/span>\u3002\u8fd9\u79cd\u65b9\u5f0f\u4e5f\u5bb9\u6613\u6269\u5c55\uff0c\u56e0\u4e3a\u8981\u7ed9\u7535\u8111\u52a0\u786c\u76d8\u7684\u8bdd\uff0c\u53ea\u9700\u8981\u52a0\u4e00\u4e2a HardDiskFactory \u548c\u76f8\u5e94\u7684\u5b9e\u73b0\u5373\u53ef\uff0c\u4e0d\u9700\u8981\u4fee\u6539\u73b0\u6709\u7684\u5de5\u5382\u3002<\/p>\n
    \u4f46\u662f\uff0c\u8fd9\u79cd\u65b9\u5f0f\u6709\u4e00\u4e2a\u95ee\u9898\uff0c\u90a3\u5c31\u662f\u5982\u679c <\/span>Intel \u5bb6\u4ea7\u7684 CPU \u548c AMD \u4ea7\u7684\u4e3b\u677f\u4e0d\u80fd\u517c\u5bb9\u4f7f\u7528<\/strong> <\/span>\uff0c\u90a3\u4e48\u8fd9\u4ee3\u7801\u5c31\u5bb9\u6613\u51fa\u9519\uff0c\u56e0\u4e3a\u5ba2\u6237\u7aef\u5e76\u4e0d\u77e5\u9053\u5b83\u4eec\u4e0d\u517c\u5bb9\uff0c\u4e5f\u5c31\u4f1a\u9519\u8bef\u5730\u51fa\u73b0\u968f\u610f\u7ec4\u5408\u3002<\/p>\n
    \u4e0b\u9762\u5c31\u662f\u6211\u4eec\u8981\u8bf4\u7684\u4ea7\u54c1\u65cf<\/strong> <\/span>\u7684\u6982\u5ff5\uff0c\u5b83\u4ee3\u8868\u4e86\u7ec4\u6210\u67d0\u4e2a\u4ea7\u54c1\u7684\u4e00\u7cfb\u5217\u9644\u4ef6\u7684\u96c6\u5408\uff1a<\/p>\n