{"id":1130,"date":"2023-03-16T21:49:57","date_gmt":"2023-03-16T13:49:57","guid":{"rendered":"https:\/\/www.appblog.cn\/?p=1130"},"modified":"2023-04-29T10:01:34","modified_gmt":"2023-04-29T02:01:34","slug":"design-pattern-decoration-mode","status":"publish","type":"post","link":"https:\/\/www.appblog.cn\/index.php\/2023\/03\/16\/design-pattern-decoration-mode\/","title":{"rendered":"\u8bbe\u8ba1\u6a21\u5f0f\uff0821\uff09\u88c5\u9970\u6a21\u5f0f"},"content":{"rendered":"

\u88c5\u9970\u6a21\u5f0f\u4e5f\u79f0\u4e3a\u5305\u88c5\u6a21\u5f0f\uff0c\u662f\u7ed3\u6784\u578b\u8bbe\u8ba1\u6a21\u5f0f\u4e4b\u4e00\u3002\u88c5\u9970\u6a21\u5f0f\u662f\u4e00\u79cd\u7528\u4e8e\u66ff\u4ee3\u7ee7\u627f\u6280\u672f\u7684\u4e00\u79cd\u65b9\u6848\u3002<\/p>\n

\u5b9a\u4e49<\/h2>\n

<\/p>\n

\u52a8\u6001\u7684\u7ed9\u4e00\u4e2a\u5bf9\u8c61\u6dfb\u52a0\u4e00\u4e9b\u989d\u5916\u7684\u804c\u8d23\u3002\u5c31\u589e\u52a0\u529f\u80fd\u6765\u8bf4\uff0c\u88c5\u9970\u6a21\u5f0f\u76f8\u6bd4\u751f\u6210\u5b50\u7c7b\u66f4\u4e3a\u7075\u6d3b\u3002<\/p>\n

\u4f7f\u7528\u573a\u666f<\/h2>\n

\uff081\uff09\u9700\u8981\u900f\u660e\u4e14\u52a8\u6001\u5730\u6269\u5c55\u7c7b\u7684\u529f\u80fd\u65f6\u3002\u4e14\u5728\u4e0d\u5f71\u54cd\u5176\u4ed6\u5bf9\u8c61\u7684\u60c5\u51b5\u4e0b\u3002
\n\uff082\uff09\u5f53\u4e0d\u80fd\u91c7\u7528\u7ee7\u627f\u5bf9\u7cfb\u7edf\u8fdb\u884c\u6269\u5c55\u65f6\u53ef\u4ee5\u4f7f\u7528\u88c5\u9970\u6a21\u5f0f\u3002\u6bd4\u5982final\u7c7b\u3002<\/p>\n

UML\u7c7b\u56fe<\/h2>\n

\u8fd9\u91cc\u5199\u56fe\u7247\u63cf\u8ff0<\/p>\n

\uff081\uff09Component<\/code>\uff1a\u62bd\u8c61\u7ec4\u4ef6\u3002\u53ef\u4ee5\u662f\u4e00\u4e2a\u63a5\u53e3\u6216\u62bd\u8c61\u7c7b\uff0c\u5176\u5145\u5f53\u7684\u5c31\u662f\u88ab\u88c5\u9970\u7684\u539f\u59cb\u5bf9\u8c61\u3002
\n\uff082\uff09ConcreteComponent<\/code>\uff1a\u7ec4\u4ef6\u5177\u4f53\u5b9e\u73b0\u7c7b\uff0c\u8be5\u7c7b\u662fComponent\u7c7b\u7684\u57fa\u672c\u5b9e\u73b0\uff0c\u4e5f\u662f\u6211\u4eec\u88c5\u9970\u7684\u5177\u4f53\u5bf9\u8c61\u3002
\n\uff083\uff09Decorator<\/code>\uff1a\u62bd\u8c61\u88c5\u9970\u8005\uff0c\u5176\u804c\u8d23\u5c31\u662f\u88c5\u9970\u6211\u4eec\u7684\u7ec4\u4ef6\u5bf9\u8c61\uff0c\u901a\u8fc7\u5176\u5b50\u7c7b\u6269\u5c55\u8be5\u65b9\u6cd5\u4ee5\u8fbe\u5230\u88c5\u9970\u7684\u76ee\u7684\u3002\u5176\u5185\u90e8\u4e00\u5b9a\u8981\u6709\u4e00\u4e2a\u6307\u5411\u7ec4\u4ef6\u5bf9\u8c61\u7684\u5f15\u7528\u3002\u5728\u5927\u591a\u6570\u60c5\u51b5\u4e0b\uff0c\u8be5\u7c7b\u4e3a\u62bd\u8c61\u7c7b\uff0c\u9700\u8981\u6839\u636e\u4e0d\u540c\u7684\u88c5\u9970\u903b\u8f91\u5b9e\u73b0\u4e0d\u540c\u7684\u5177\u4f53\u5b50\u7c7b\u3002
\n\uff084\uff09ConcreteDecoratorA<\/code>\u3001ConcreteDecoratorB<\/code>\uff1a\u88c5\u9970\u7740\u5177\u4f53\u5b9e\u73b0\u7c7b\u3002\u8d1f\u8d23\u5411\u6784\u4ef6\u6dfb\u52a0\u65b0\u7684\u804c\u8d23\u3002<\/p>\n

\u7b80\u5355\u5b9e\u73b0<\/h2>\n

\u4ee5\u4e00\u4e2a\u7537\u5b69\u7a7f\u8863\u88c5\u626e\u4e3a\u4f8b\u3002\u5b9e\u73b0\u7ed9\u7537\u5b69\u5728\u5bb6\u4e0e\u51fa\u95e8\u7684\u7a7f\u8863\u88c5\u626e\u3002<\/p>\n

\u62bd\u8c61\u7ec4\u4ef6\u7c7b\uff08Component\uff09\uff1a<\/p>\n

public abstract class Person {\n    \/**\n     * Person\u4e0b\u6709\u4e00\u4e2a\u7a7f\u7740\u7684\u62bd\u8c61\u65b9\u6cd5 \n     *\/\n    public abstract void dressed();\n}<\/code><\/pre>\n
\u5177\u4f53\u5b9e\u73b0\u7c7b\uff08ConcreteComponent\uff09\uff1a\u8868\u793a\u8981\u88c5\u626e\u7684Boy<\/p>\n
public class Boy extends Person{\n\n    @Override\n    public void dressed() {\n        System.out.println("Boy\u7a7f\u4e86\u5185\u8863\u5185\u88e4");\n    }\n\n}<\/code><\/pre>\n
\u62bd\u8c61\u88c5\u9970\u7c7b\uff08Decorator\uff09\uff1aPersonCloth \u8868\u793a\u4eba\u6240\u7a7f\u7740\u7684\u8863\u670d<\/p>\n
public class PersonCloth extends Person{\n\n    protected Person mPerson; \/\/\u4fdd\u6301\u4e00\u4e2aPerson\u7c7b\u7684\u5f15\u7528\n\n    public PersonCloth(Person mPerson) {\n        super();\n        this.mPerson = mPerson;\n    }\n\n    @Override\n    public void dressed() {\n        mPerson.dressed();\n    }\n}<\/code><\/pre>\n
\u51fa\u95e8\u7a7f\u7684\u8863\u670d\uff1a<\/p>\n
public class OutsideCloth extends PersonCloth{\n\n    public OutsideCloth(Person mPerson) {\n        super(mPerson);\n    }\n\n    \/**\n     * \u7a7f\u77ed\u8896 \n     *\/\n    private void dressShirt(){\n        System.out.println("\u7a7f\u4ef6\u77ed\u8896");\n    }\n\n    \/**\n     * \u7a7f\u725b\u4ed4\u88e4 \n     *\/\n    private void dressJean(){\n        System.out.println("\u7a7f\u725b\u4ed4\u88e4");\n    }\n\n    \/**\n     * \u7a7f\u978b\u5b50 \n     *\/\n    private void dressShoes(){\n        System.out.println("\u7a7f\u978b\u5b50 ");\n    }\n\n    @Override\n    public void dressed() {\n        super.dressed();\n        dressShirt();\n        dressJean();\n        dressShoes();\n    }\n\n}<\/code><\/pre>\n
\u5728\u5bb6\u7a7f\u7684\u8863\u670d\uff1a<\/p>\n
public class HomeCloth extends PersonCloth{\n\n    public HomeCloth(Person mPerson) {\n        super(mPerson);\n    }\n\n    \/**\n     * \u7a7f\u77ed\u88e4\n     *\/\n    private void dressShorts(){\n        System.out.println("\u7a7f\u77ed\u88e4");\/\/\u5728\u5bb6\u91cc\u968f\u4fbf\u70b9\n    }\n\n    @Override\n    public void dressed() {\n        super.dressed();\n        dressShorts();\n    }\n\n}<\/code><\/pre>\n
\u88c5\u626e\uff1a<\/p>\n
public class Client {\n    public static void main(String[] args) {\n        \/\/\u9996\u5148\u6709\u4e00\u4e2a\u7537\u5b69\n        Person person = new Boy();\n\n        \/\/\u5728\u5bb6\n        PersonCloth personCloth = new HomeCloth(person);\n        personCloth.dressed();\n        System.out.println("--------------");\n        \/\/\u51fa\u95e8\n        PersonCloth personCloth1 = new OutsideCloth(person);\n        personCloth1.dressed();\n\n    }\n}<\/code><\/pre>\n
\u7ed3\u679c<\/p>\n
Boy\u7a7f\u4e86\u5185\u8863\u5185\u88e4\n\u7a7f\u77ed\u88e4\n--------------\nBoy\u7a7f\u4e86\u5185\u8863\u5185\u88e4\n\u7a7f\u4ef6\u77ed\u8896\n\u7a7f\u725b\u4ed4\u88e4\n\u7a7f\u978b\u5b50 <\/code><\/pre>\n
Android\u6e90\u7801\u4e2d\u7684\u5b9e\u73b0<\/h2>\n
    \n
  • Context<\/li>\n<\/ul>\n
    Context<\/code>\u7c7b\u5728Android\u4e2d\u88ab\u79f0\u4e3a\u201c\u4e0a\u5e1d\u5bf9\u8c61\u201d\uff0c\u5b83\u7684\u672c\u8d28\u5c31\u662f\u4e00\u4e2a\u62bd\u8c61\u7c7b\uff0c\u5728\u88c5\u9970\u6a21\u5f0f\u4e2d\u76f8\u5f53\u4e8e\u62bd\u8c61\u7ec4\u4ef6\uff0c\u800c\u5728\u5185\u90e8\u5b9a\u4e49\u4e86\u5927\u91cf\u7684\u62bd\u8c61\u65b9\u6cd5\uff0c\u6bd4\u5982\u6211\u4eec\u7ecf\u5e38\u7528\u5230\u7684startActivity<\/code>\u65b9\u6cd5\u3002\u800c\u771f\u6b63\u5b9e\u73b0\u662f\u5728ContextImpl<\/code>\u4e2d\u5b8c\u6210\uff0c\u90a3\u4e48ContextImpl<\/code>\u5c31\u662f\u5177\u4f53\u5b9e\u73b0\u7c7b\u3002\u56e0\u4e3aContextWrapper<\/code>\u7ee7\u627f\u4e8eContext<\/code>\uff0c\u6240\u4ee5ContextWrapper<\/code>\u5c31\u662f\u88c5\u9970\u8005\u3002\u5177\u4f53\u5927\u5bb6\u53ef\u4ee5\u81ea\u884c\u67e5\u770b\u6e90\u7801\u3002<\/p>\n
    \u533a\u522b<\/h2>\n
      \n
    • \u4e0e\u4ee3\u7406\u6a21\u5f0f\u7684\u533a\u522b<\/li>\n<\/ul>\n
      \uff081\uff09\u88c5\u9970\u6a21\u5f0f\u662f\u4ee5\u5bf9\u5ba2\u6237\u7aef\u900f\u660e\u7684\u65b9\u5f0f\u6269\u5c55\u5bf9\u8c61\u7684\u529f\u80fd\uff0c\u662f\u7ee7\u627f\u65b9\u6848\u7684\u4e00\u4e2a\u66ff\u4ee3\uff1b\u800c\u4ee3\u7406\u6a21\u5f0f\u5219\u662f\u7ed9\u4e00\u4e2a\u5bf9\u8c61\u63d0\u4f9b\u4e00\u4e2a\u4ee3\u7406\u5bf9\u8c61\uff0c\u5e76\u6709\u4ee3\u7406\u5bf9\u8c61\u6765\u63a7\u5236\u5bf9\u539f\u6709\u5bf9\u8c61\u7684\u5f15\u7528\u3002
      \n\uff082\uff09\u88c5\u9970\u6a21\u5f0f\u5e94\u8be5\u4e3a\u6240\u88c5\u9970\u7684\u5bf9\u8c61\u589e\u5f3a\u529f\u80fd\uff1b\u4ee3\u7406\u6a21\u5f0f\u662f\u5bf9\u4ee3\u7406\u5bf9\u8c61\u65bd\u52a0\u63a7\u5236\uff0c\u4e0d\u5bf9\u5bf9\u8c61\u672c\u8eab\u529f\u80fd\u8fdb\u884c\u589e\u5f3a\u3002<\/p>\n
        \n
      • \u4e0e\u9002\u914d\u5668\u6a21\u5f0f\u7684\u533a\u522b<\/li>\n<\/ul>\n
        \u9002\u914d\u5668\u6a21\u5f0f\u662f\u7528\u65b0\u63a5\u53e3\u6765\u8c03\u7528\u539f\u63a5\u53e3\uff0c\u539f\u63a5\u53e3\u5bf9\u65b0\u7cfb\u7edf\u662f\u4e0d\u53ef\u89c1\u7684\uff1b\u88c5\u9970\u6a21\u5f0f\u589e\u5f3a\u4e86\u5176\u4ed6\u5bf9\u8c61\u7684\u529f\u80fd\u800c\u540c\u65f6\u53c8\u4e0d\u6539\u53d8\u5b83\u7684\u63a5\u53e3\u3002<\/p>\n
        \u603b\u7ed3<\/h2>\n
        \u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\u6211\u4eec\u5e94\u8be5\u5199\u8fc7\u5982\u4e0b\u4ee3\u7801\uff1a\u5176\u5b9e\u8fd9\u4e9b\u65b0\u589e\u65b9\u6cd5\u7684\u8c03\u7528\u5c31\u7c7b\u4f3c\u88c5\u9970\u6a21\u5f0f\u4e2d\u7684\u88c5\u9970\u8005\u7684\u804c\u8d23\uff0c\u53ea\u4e0d\u8fc7\u8fd9\u91cc\u6211\u4eec\u6ca1\u6709\u4fdd\u6301\u5bf9\u7ec4\u4ef6\u7c7b\u7684\u5f15\u7528\u3002<\/p>\n
        @Override\nprotected void onCreate(Bundle savedInstanceState) {\n    super.onCreate(savedInstanceState);\n    setContentView(R.layout.activity_main);\n\n    \/\/\u521d\u59cb\u5316\u6570\u636e\n    initData();\n\n    \/\/\u521d\u59cb\u5316\u63a7\u4ef6\n    initViews();\n\n    \/\/\u521d\u59cb\u5316\u4e8b\u4ef6\n    initEvent();\n}<\/code><\/pre>\n
          \n
        • \u4f18\u70b9<\/li>\n<\/ul>\n
          \uff081\uff09\u5bf9\u4e8e\u6269\u5c55\u4e00\u4e2a\u5bf9\u8c61\u7684\u529f\u80fd\uff0c\u88c5\u9970\u6a21\u5f0f\u6bd4\u7ee7\u627f\u66f4\u52a0\u7075\u6d3b\u6027\uff0c\u4e0d\u4f1a\u5bfc\u81f4\u7c7b\u7684\u4e2a\u6570\u6025\u5267\u589e\u52a0\u3002
          \n\uff082\uff09\u53ef\u4ee5\u901a\u8fc7\u4e00\u79cd\u52a8\u6001\u7684\u65b9\u5f0f\u5728\u8fd0\u884c\u65f6\u9009\u62e9\u4e0d\u540c\u7684\u5177\u4f53\u88c5\u9970\u7c7b\uff0c\u4ece\u800c\u5b9e\u73b0\u4e0d\u540c\u7684\u884c\u4e3a\u3002
          \n\uff083\uff09\u53ef\u4ee5\u5bf9\u4e00\u4e2a\u5bf9\u8c61\u8fdb\u884c\u591a\u6b21\u88c5\u9970\uff0c\u901a\u8fc7\u4f7f\u7528\u4e0d\u540c\u7684\u5177\u4f53\u88c5\u9970\u7c7b\u4ee5\u53ca\u8fd9\u4e9b\u88c5\u9970\u7c7b\u7684\u6392\u5217\u7ec4\u5408\uff0c\u53ef\u4ee5\u521b\u9020\u51fa\u5f88\u591a\u4e0d\u540c\u884c\u4e3a\u7684\u7ec4\u5408\uff0c\u5f97\u5230\u529f\u80fd\u66f4\u4e3a\u5f3a\u5927\u7684\u5bf9\u8c61\u3002
          \n\uff084\uff09\u5177\u4f53\u6784\u4ef6\u7c7b\u4e0e\u5177\u4f53\u88c5\u9970\u7c7b\u53ef\u4ee5\u72ec\u7acb\u53d8\u5316\uff0c\u7528\u6237\u53ef\u4ee5\u6839\u636e\u9700\u8981\u589e\u52a0\u65b0\u7684\u5177\u4f53\u6784\u4ef6\u7c7b\u548c\u5177\u4f53\u88c5\u9970\u7c7b\uff0c\u539f\u6709\u7c7b\u5e93\u4ee3\u7801\u65e0\u987b\u6539\u53d8\uff0c\u7b26\u5408\u201c\u5f00\u95ed\u539f\u5219\u201d\u3002<\/p>\n
            \n
          • \u7f3a\u70b9<\/li>\n<\/ul>\n
            \uff081\uff09\u4f7f\u7528\u88c5\u9970\u6a21\u5f0f\u8fdb\u884c\u7cfb\u7edf\u8bbe\u8ba1\u65f6\u5c06\u4ea7\u751f\u5f88\u591a\u5c0f\u5bf9\u8c61\uff0c\u8fd9\u4e9b\u5bf9\u8c61\u7684\u533a\u522b\u5728\u4e8e\u5b83\u4eec\u4e4b\u95f4\u76f8\u4e92\u8fde\u63a5\u7684\u65b9\u5f0f\u6709\u6240\u4e0d\u540c\uff0c\u800c\u4e0d\u662f\u5b83\u4eec\u7684\u7c7b\u6216\u8005\u5c5e\u6027\u503c\u6709\u6240\u4e0d\u540c\uff0c\u5927\u91cf\u5c0f\u5bf9\u8c61\u7684\u4ea7\u751f\u52bf\u5fc5\u4f1a\u5360\u7528\u66f4\u591a\u7684\u7cfb\u7edf\u8d44\u6e90\uff0c\u5728\u4e00\u5b9a\u7a0b\u5e8f\u4e0a\u5f71\u54cd\u7a0b\u5e8f\u7684\u6027\u80fd\u3002
            \n\uff082\uff09\u5bf9\u4e8e\u591a\u6b21\u88c5\u9970\u7684\u5bf9\u8c61\uff0c\u8c03\u8bd5\u65f6\u5bfb\u627e\u9519\u8bef\u53ef\u80fd\u9700\u8981\u9010\u7ea7\u6392\u67e5\uff0c\u8f83\u4e3a\u7e41\u7410\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
            \u88c5\u9970\u6a21\u5f0f\u4e5f\u79f0\u4e3a\u5305\u88c5\u6a21\u5f0f\uff0c\u662f\u7ed3\u6784\u578b\u8bbe\u8ba1\u6a21\u5f0f\u4e4b\u4e00\u3002\u88c5\u9970\u6a21\u5f0f\u662f\u4e00\u79cd\u7528\u4e8e\u66ff\u4ee3\u7ee7\u627f\u6280\u672f\u7684\u4e00\u79cd\u65b9\u6848\u3002 \u5b9a\u4e49 \u52a8\u6001\u7684\u7ed9\u4e00\u4e2a\u5bf9 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[303],"tags":[],"class_list":["post-1130","post","type-post","status-publish","format-standard","hentry","category-design-pattern"],"_links":{"self":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/1130","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/comments?post=1130"}],"version-history":[{"count":0,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/1130\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/media?parent=1130"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/categories?post=1130"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/tags?post=1130"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}