{"id":1075,"date":"2019-10-14T10:51:01","date_gmt":"2019-10-14T02:51:01","guid":{"rendered":"http:\/\/www.rain1024.com\/?p=1075"},"modified":"2023-08-07T20:57:24","modified_gmt":"2023-08-07T12:57:24","slug":"%e3%80%8aheadfirst%e8%ae%be%e8%ae%a1%e6%a8%a1%e5%bc%8f%e3%80%8b%e7%ac%ac%e4%b8%89%e7%ab%a0-%e8%a3%85%e9%a5%b0%e8%80%85%e6%a8%a1%e5%bc%8f-%e8%af%bb%e4%b9%a6%e7%ac%94%e8%ae%b0","status":"publish","type":"post","link":"http:\/\/rain1024.com\/index.php\/2019\/10\/14\/%e3%80%8aheadfirst%e8%ae%be%e8%ae%a1%e6%a8%a1%e5%bc%8f%e3%80%8b%e7%ac%ac%e4%b8%89%e7%ab%a0-%e8%a3%85%e9%a5%b0%e8%80%85%e6%a8%a1%e5%bc%8f-%e8%af%bb%e4%b9%a6%e7%ac%94%e8%ae%b0\/","title":{"rendered":"\u300aHeadFirst\u8bbe\u8ba1\u6a21\u5f0f\u300b\u7b2c\u4e09\u7ae0-\u88c5\u9970\u8005\u6a21\u5f0f-\u8bfb\u4e66\u7b14\u8bb0"},"content":{"rendered":"

\u300aHeadFirst\u8bbe\u8ba1\u6a21\u5f0f\u300b\u7b2c\u4e09\u7ae0-\u88c5\u9970\u8005\u6a21\u5f0f-\u8bfb\u4e66\u7b14\u8bb0<\/h1>\n

\u6848\u4f8b\u4ee3\u7801\u94fe\u63a5\uff1ahttps:\/\/github.com\/rainweb521\/My-tutorial\/tree\/master\/Design_patterns<\/h3>\n

\u80cc\u666f<\/h2>\n

\n \u8fd9\u4e00\u6b21\u662f\u661f\u5df4\u5179\u5496\u5561\uff0c\u4ed6\u4eec\u9700\u8981\u65b0\u7684\u8ba2\u5355\u7cfb\u7edf\uff0c\u539f\u6765\u7684\u8bbe\u8ba1\u592a\u8fc7\u5197\u4f59\uff0c\u76f4\u63a5\u4f7f\u7528\u4e00\u4e2a\u996e\u6599\u62bd\u8c61\u7c7b\u4f5c\u4e3a\u7236\u7c7b\uff0c\u5176\u4ed6\u8981\u589e\u52a0\u8c03\u6599\u7684\u8fc7\u7a0b\u7528\u5b50\u7c7b\u7ee7\u627f\u7236\u7c7b\uff0c\u4e4b\u540e\u518d\u5b9e\u73b0\uff0c\u8fd9\u6837\u5c31\u53d8\u5f97\u7279\u522b\u7e41\u7410\uff0c\u6839\u672c\u6ca1\u6709\u529e\u6cd5\u53bb\u7ef4\u62a4\u3002\n<\/p><\/blockquote>\n

\"\"<\/p>\n

\n \u8fdd\u53cd\u4e86\u4e4b\u524d\u89c4\u5b9a\u7684\u8bbe\u8ba1\u539f\u5219\uff1a<\/p>\n

    \n
  1. \u591a\u7528\u7ec4\u5408\uff0c\u5c11\u7528\u7ee7\u627f\u3002<\/li>\n
  2. \u9488\u5bf9\u63a5\u53e3\u7f16\u7a0b\uff0c\u4e0d\u9488\u5bf9\u5b9e\u73b0\u7f16\u7a0b\u3002<\/li>\n<\/ol>\n<\/blockquote>\n

    \u7b2c\u4e00\u79cd\u89e3\u51b3\u65b9\u6848<\/h2>\n

    \u5b9e\u73b0\u8fc7\u7a0b<\/h3>\n

    \n \u76f4\u63a5\u91cd\u5199Beverage\u7c7b\uff0c\u628a\u6240\u6709\u7684\u8c03\u6599\u90fd\u5199\u8fdb\u53bb\uff0c\u53d8\u6210\u4e00\u4e2aboolean\u503c\uff0c\u5728\u7236\u7c7b\u7684cost\u91cc\u5224\u65ad\uff0c\u5e76\u76f8\u52a0\u8fd9\u4e9b\u8c03\u6599\u3002<\/p>\n

    \u5b50\u7c7b\u7ee7\u7eed\u7236\u7c7b\u540e\uff0c\u91cd\u5199cost\u65b9\u6cd5\uff0c\u7528\u81ea\u5df1\u7684\u4ef7\u683c\u518d\u52a0\u4e0a\u7236\u7c7bcost\u8ba1\u7b97\u7684\u4ef7\u683c\u3002<\/p>\n

    \u8fd9\u6837\u5c31\u6574\u4f53\u5b8c\u6210\u4e86\u65b0\u7684\u8bbe\u8ba1\u3002\n<\/p><\/blockquote>\n

    \"image-20191013162800277\"<\/p>\n

    \"image-20191013163230134\"<\/p>\n

    \u4f9d\u65e7\u5b58\u5728\u95ee\u9898<\/h3>\n

    \n \u5f53\u54ea\u4e9b\u9700\u6c42\u6216\u56e0\u7d20\u6539\u53d8\u65f6\uff0c\u4f1a\u5f71\u54cd\u8fd9\u4e2a\u8bbe\u8ba1\uff1f<\/p>\n

      \n
    1. \u8c03\u6599\u4ef7\u94b1\u7684\u6539\u53d8\u4f1a\u4f7f\u6211\u4eec\u66f4\u6539\u73b0\u6709\u4ee3\u7801\u3002<\/li>\n
    2. \u4e00\u65e6\u51fa\u73b0\u65b0\u7684\u8c03\u6599,\u6211\u4eec\u5c31\u9700\u8981\u52a0\u4e0a\u65b0\u7684\u65b9\u6cd5,\u5e76\u6539\u53d8\u8d85\u7c7b\u4e2d\u7684cost()\u65b9\u6cd5\u3002<\/li>\n
    3. \u4ee5\u540e\u53ef\u80fd\u4f1a\u5f00\u53d1\u51fa\u65b0\u996e\u6599\u3002\u5bf9\u8fd9\u4e9b\u996e\u6599\u800c\u8a00(\u4f8b\u5982:\u51b0\u8336),\u67d0\u4e9b\u8c03\u6599\u53ef\u80fd\u5e76\u4e0d\u9002\u5408,\u4f46\u662f\u5728\u8fd9\u4e2a\u8bbe\u8ba1\u65b9\u5f0f\u4e2d,Tea(\u8336)\u5b50\u7c7b\u4ecd\u5c06\u7ee7\u627f\u90a3\u4e9b\u4e0d\u9002\u5408\u7684\u65b9\u6cd5,\u4f8b\u5982:hasWhip()(\u52a0\u5976\u6ce1)\u3002<\/li>\n
    4. \u4e07\u4e00\u987e\u5ba2\u60f3\u8981\u53cc\u500d\u6469\u5361\u5496\u5561,\u600e\u4e48\u529e<\/li>\n<\/ol>\n<\/blockquote>\n

      \u8bbe\u8ba1\u539f\u5219<\/h2>\n

      \n \u7c7b\u5e94\u8be5\u5bf9\u6269\u5c55\u5f00\u653e\uff0c\u5bf9\u4fee\u6539\u5173\u95ed\u3002\n<\/p><\/blockquote>\n

      \u8bbe\u8ba1\u6a21\u5f0f<\/h2>\n

      \n \u88c5\u9970\u8005\u6a21\u5f0f<\/strong>\uff1a\u52a8\u6001\u5730\u5c06\u8d23\u4efb\u9644\u52a0\u5230\u5bf9\u8c61\u4e0a\u3002\u82e5\u8981\u62d3\u5c55\u529f\u80fd\uff0c\u88c5\u9970\u8005\u63d0\u4f9b\u4e86\u6bd4\u7ee7\u627f\u66f4\u6709\u5f39\u6027\u7684\u66ff\u4ee3\u65b9\u6848\u3002\n<\/p><\/blockquote>\n

      \u7b2c\u4e8c\u79cd\u89e3\u51b3\u65b9\u6848<\/h2>\n

      1.\u6211\u4eec\u8981\u505a\u7684\u6d41\u7a0b<\/h3>\n
        \n
      1. \u62ff\u4e00\u4e2a\u6df1\u7119\u5496\u5561(DarkRoast)\u5bf9\u8c61<\/li>\n
      2. \u4ee5\u6469\u5361(Mocha)\u5bf9\u8c61\u88c5\u9970\u5b83<\/li>\n
      3. \u4ee5\u5976\u6ce1(Whip)\u5bf9\u8c61\u88c5\u9970\u5b83<\/li>\n
      4. \u8c03\u7528cost()\u65b9\u6cd5,\u5e76\u4f9d\u8d56\u59d4\u6258(delegate)\u5c06\u8c03\u6599\u7684\u4ef7\u94b1\u52a0\u4e0a\u53bb<\/li>\n<\/ol>\n

        2.\u6a21\u62df\u88c5\u9970\u8fc7\u7a0b<\/h3>\n

        \"image-20191013164052988\"<\/p>\n

        \"image-20191013164104660\"<\/p>\n

        \n \u6ce8\u610f\uff1a<\/p>\n

          \n
        1. \u88c5\u9970\u8005\u548c\u88ab\u88c5\u9970\u5bf9\u8c61\u6709\u76f8\u540c\u7684\u8d85\u7c7b\u578b\u3002<\/li>\n
        2. \u4f60\u53ef\u4ee5\u7528\u4e00\u4e2a\u6216\u591a\u4e2a\u88c5\u9970\u8005\u5305\u88c5\u4e00\u4e2a\u5bf9\u8c61\u3002<\/li>\n
        3. \u65e2\u7136\u88c5\u9970\u8005\u548c\u88ab\u88c5\u9970\u5bf9\u8c61\u6709\u76f8\u540c\u7684\u8d85\u7c7b\u578b,\u6240\u4ee5\u5728\u4efb\u4f55\u9700\u8981\u539f\u59cb\u5bf9\u8c61(\u88ab\u5305\u88c5\u7684)\u7684\u573a\u5408, \u53ef\u4ee5\u7528\u88c5\u9970\u8fc7\u7684\u5bf9\u8c61\u4ee3\u66ff\u5b83\u3002<\/li>\n
        4. \u88c5\u9970\u8005\u53ef\u4ee5\u5728\u6240\u59d4\u6258\u88ab\u88c5\u9970\u8005\u7684\u884c\u4e3a\u4e4b\u524d\u4e0e\/\u6216\u4e4b\u540e,\u52a0\u4e0a\u81ea\u5df1\u7684\u884c\u4e3a,\u4ee5\u8fbe\u5230\u7279\u5b9a\u7684\u76ee\u7684\u3002<\/em><\/strong><\/li>\n
        5. \u5bf9\u8c61\u53ef\u4ee5\u5728\u4efb\u4f55\u65f6\u5019\u88ab\u88c5\u9970,\u6240\u4ee5\u53ef\u4ee5\u5728\u8fd0\u884c\u65f6\u52a8\u6001\u5730\u3001\u4e0d\u9650\u91cf\u5730\u7528\u4f60\u559c\u6b22\u7684\u88c5\u9970\u8005\u6765\u88c5\u9970\u5bf9\u8c61\u3002<\/li>\n<\/ol>\n<\/blockquote>\n

          3.\u6a21\u62df\u5b9e\u73b0\u7c7b\u56fe<\/h3>\n

          \"image-20191013164455814\"<\/p>\n

          \n \u6ce8\u610f\uff1a<\/p>\n

          \u8fd9\u91cc\u8fd8\u662f\u7528\u5230\u4e86\u7ee7\u627f\uff0c\u7ee7\u627fBeverage\u62bd\u8c61\u7c7b,\u662f\u4e3a\u4e86\u6709\u6b63\u786e\u7684\u7c7b\u578b,\u800c\u4e0d\u662f\u7ee7\u627f\u5b83\u7684\u884c\u4e3a\u3002\u884c\u4e3a\u6765\u81ea\u88c5\u9970\u8005\u548c\u57fa\u7840\u7ec4\u4ef6,\u6216\u4e0e\u5176\u4ed6\u88c5\u9970\u8005\u4e4b\u95f4\u7684\u7ec4\u5408\u5173\u7cfb\u3002\n<\/p><\/blockquote>\n

          4.\u5177\u4f53\u4ee3\u7801\u5b9e\u73b0<\/h4>\n

          \"image-20191013165939619\"<\/p>\n

          public abstract class Beverage {\nString description = \"Unknown Beverage\";\npublic String getDescription(){\nreturn description;\n}\npublic abstract double cost();\n}\n\npublic abstract class CondimentDecorator extends Beverage {\n\npublic abstract String getDescription();\n}\n\npublic class Espresso extends Beverage {\npublic Espresso(){\ndescription = \"Espresso\";\n}\n\npublic double cost() {\nreturn 1.99;\n}\n}\n\npublic class HouseBlend extends Beverage {\n\npublic HouseBlend(){\ndescription = \"HouseBlend\";\n}\n\npublic double cost() {\nreturn 0.89;\n}\n}\n\npublic class Mocha extends CondimentDecorator {\nBeverage beverage;\n\npublic Mocha(Beverage beverage){\nthis.beverage = beverage;\n}\n\npublic String getDescription() {\nreturn beverage.getDescription() + \",Mocha\";\n}\n\npublic double cost() {\nreturn .20+beverage.cost();\n}\n}\n\npublic class StarbuzzCoffee {\npublic static void main(String[] args) {\nBeverage beverage = new Espresso();\nSystem.out.println(beverage.getDescription()+\" $ \"+beverage.cost());\n\nBeverage beverage1 = new HouseBlend();\nbeverage1 = new Mocha(beverage1);\nSystem.out.println(beverage1.getDescription()+\" $ \"+beverage1.cost());\n}\n}\n\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
          \u300aHeadFirst\u8bbe\u8ba1\u6a21\u5f0f\u300b\u7b2c\u4e09\u7ae0-\u88c5\u9970\u8005\u6a21\u5f0f-\u8bfb\u4e66\u7b14\u8bb0 \u6848\u4f8b\u4ee3\u7801\u94fe\u63a5\uff1ahttps:\/\/github.com\u2026 Read More »<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23],"tags":[91],"class_list":["post-1075","post","type-post","status-publish","format-standard","hentry","category-23","tag-91"],"_links":{"self":[{"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/posts\/1075","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/comments?post=1075"}],"version-history":[{"count":1,"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/posts\/1075\/revisions"}],"predecessor-version":[{"id":1375,"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/posts\/1075\/revisions\/1375"}],"wp:attachment":[{"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/media?parent=1075"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/categories?post=1075"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/tags?post=1075"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}