{"id":1945,"date":"2022-02-14T10:28:53","date_gmt":"2022-02-14T02:28:53","guid":{"rendered":"https:\/\/www.zeroheart.xyz\/wordpress\/?p=1945"},"modified":"2022-02-14T11:07:41","modified_gmt":"2022-02-14T03:07:41","slug":"%e8%a3%85%e9%a5%b0%e5%99%a8%e6%a8%a1%e5%bc%8f","status":"publish","type":"post","link":"https:\/\/www.zeroheart.xyz\/wordpress\/?p=1945","title":{"rendered":"\u88c5\u9970\u5668\u6a21\u5f0f"},"content":{"rendered":"\n<p>\u52a8\u6001\u7684\u7ed9\u5df2\u6709\u5bf9\u8c61\u6dfb\u52a0\u4e00\u4e9b\u529f\u80fd\uff0c\u4e0d\u6539\u53d8\u539f\u59cb\u7ed3\u6784\uff0c\u88c5\u9970\u5668\u6a21\u5f0f\u76f8\u6bd4\u751f\u6210\u5b50\u7c7b\u66f4\u4e3a\u7075\u6d3b\u3002<\/p>\n\n\n\n<p><strong>\u7f3a\u70b9\uff1a<\/strong>\u591a\u5c42\u88c5\u9970\u6bd4\u8f83\u590d\u6742\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">\u6211\u4eec\u5c06\u521b\u5efa\u4e00\u4e2a Shape \u63a5\u53e3\u548c\u5b9e\u73b0\u4e86 Shape \u63a5\u53e3\u7684\u5b9e\u4f53\u7c7b\u3002\u7136\u540e\u6211\u4eec\u521b\u5efa\u4e00\u4e2a\u5b9e\u73b0\u4e86 Shape \u63a5\u53e3\u7684\u62bd\u8c61\u88c5\u9970\u7c7b ShapeDecorator\uff0c\u5e76\u628a Shape \u5bf9\u8c61\u4f5c\u4e3a\u5b83\u7684\u5b9e\u4f8b\u53d8\u91cf\u3002\n\nRedShapeDecorator \u662f\u5b9e\u73b0\u4e86 ShapeDecorator \u7684\u5b9e\u4f53\u7c7b\u3002\n\nDecoratorPatternDemo \u7c7b\u4f7f\u7528 RedShapeDecorator \u6765\u88c5\u9970 Shape \u5bf9\u8c61\u3002\n<\/pre>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.runoob.com\/wp-content\/uploads\/2014\/08\/20210420-decorator-1-decorator-decorator.svg\" alt=\"\u88c5\u9970\u5668\u6a21\u5f0f\u7684 UML \u56fe\"\/><\/figure>\n\n\n\n<p>\u4e0a\u56fe\uff0c\u88c5\u9970\u5668\u662f\u4e00\u4e2a\u5b9e\u73b0\u88ab\u88c5\u9970\u7684\u63a5\u53e3\u7684\u62bd\u8c61\u7c7b\uff0c\u7136\u540e\u5728\u6dfb\u52a0\u4e24\u4e2a\u5b9e\u4f53\u7c7b\u6765\u5177\u4f53\u5b9e\u73b0\u4e0d\u540c\u5f62\u72b6\u7684\u88c5\u9970\u529f\u80fd\u3002<\/p>\n\n\n\n<p>\u53c2\u8003 \uff1a<a href=\"https:\/\/www.runoob.com\/design-pattern\/decorator-pattern.html\">\u88c5\u9970\u5668\u6a21\u5f0f | \u83dc\u9e1f\u6559\u7a0b (runoob.com)<\/a><\/p>\n\n\n\n<p>\u7b14\u8bb0\u4e2d\u7684\u5f62\u8c61\u4f8b\u5b50\uff1a<\/p>\n\n\n\n<p>1.\u88c5\u9970\u6a21\u5f0f\u4e3a\u5df2\u6709\u7c7b\u52a8\u6001\u9644\u52a0\u989d\u5916\u7684\u529f\u80fd\u5c31\u50cfLOL\u3001\u738b\u8005\u8363\u8000\u7b49\u7c7bDota\u6e38\u620f\u4e2d\uff0c\u82f1\u96c4\u5347\u7ea7\u4e00\u6837\u3002\u6bcf\u6b21\u82f1\u96c4\u5347\u7ea7\u90fd\u4f1a\u9644\u52a0\u4e00\u4e2a\u989d\u5916\u6280\u80fd\u70b9\u5b66\u4e60\u6280\u80fd\u3002\u5177\u4f53\u7684\u82f1\u96c4\u5c31\u662fConcreteComponent\uff0c\u6280\u80fd\u680f\u5c31\u662f\u88c5\u9970\u5668Decorator\uff0c\u6bcf\u4e2a\u6280\u80fd\u5c31\u662fConcreteDecorator\uff1b<\/p>\n\n\n\n<p>\u82f1\u96c4\u7684\u6280\u80fd\uff0c\u82f1\u96c4\u7684\u76ae\u80a4\u90fd\u53ef\u4ee5\u4f7f\u7528\u88c5\u9970\u5668\u6a21\u5f0f<\/p>\n\n\n\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-bright-red-color\">\u82f1\u96c4\u662f\u6280\u80fd\u680f\u3001\u76ae\u80a4\u680f\u662f\u88c5\u9970\u5668\u62bd\u8c61\u7c7b\uff0c\u5177\u4f53\u7684\u6280\u80fd\u548c\u76ae\u80a4\u5c31\u662f\u88c5\u9970\u7c7b<\/mark><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>2. \u5728\u300a\u7edd\u5730\u6c42\u751f\uff1a\u523a\u6fc0\u6218\u573a\u300b\u6e38\u620f\u91cc\u9762\u6211\u4eec\u90fd\u77e5\u9053\u3002<\/p>\n\n\n\n<ul><li>&nbsp;Kar 98K\u67095\u53d1\u5b50\u5f39\uff1b<\/li><li>&nbsp;\u88c5\u4e0a\u5f39\u5323\u540e\u670910\u53d1\u5b50\u5f39\uff1b<\/li><li>&nbsp;\u88c5\u4e0a4\u500d\u955c\u540e\u53ef\u4ee5\u8fdb\u884c4\u500d\u7784\u51c6\uff1b<\/li><li>&nbsp;\u88c5\u4e0a8\u500d\u955c\u540e\u53ef\u4ee5\u8fdb\u884c4\u500d\u7784\u51c6\u30018\u500d\u7784\u51c6\u3002<\/li><\/ul>\n\n\n\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-bright-red-color\">\u5403\u9e21\u6e38\u620f\u4e2d\uff0c\u67aa\u53ef\u4ee5\u4f5c\u4e3a\u4e00\u4e2a\u57fa\u7840\u7c7b\uff0c\u5404\u79cd\u914d\u4ef6\u4f5c\u4e3a\u88c5\u9970\u5668\u7684\u62bd\u8c61\u7c7b\uff0c\u5177\u4f53\u76844\u500d\u955c\u30018\u500d\u955c\u3001\u5f39\u5939\u7b49\u4f5c\u4e3a\u88c5\u9970\u7c7b\u7684\u5177\u4f53\u5b9e\u73b0\u3002<\/mark><\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">public interface Gun {\n    \/** * \u5f00\u706b\u76f4\u81f3\u6253\u7a7a\u5b50\u5f39 *\/\n    public void fire();\n}\n\npublic class Kar98K implements Gun {\n    @Override\n    public void fire() {\n        System.out.println(\"\u7830*5\");\n    }\n}\n\u88c5\u9970\u4e0a\u5f39\u5323\u53d8\u66f4\u67aa\u5f00\u706b\u529f\u80fd\uff1a\n\npublic abstract class AbstractMagazine implements Gun {\n    private Gun gun;\n\n    public AbstractMagazine(Gun gun) {\n        this.gun = gun;\n    }\n\n    @Override\n    public void fire() {\n        gun.fire();\n    }\n}\n\npublic class Magazine extends AbstractMagazine {\n    public Magazine(Gun gun) {\n        super(gun);\n    }\n\n    @Override\n    public void fire() {\n        System.out.println(\"\u7830*10\");\n    }\n}\u6d4b\u8bd5\uff1a\npublic class Demo {\n    public static void main(String[] args) {\n        System.out.println(\"[\u6361\u8d77\u4e00\u628a98K]\");\n        Gun gun = new Kar98K();\n        System.out.println(\"[\u5f00\u70ae\uff01]\");\n        gun.fire();\n        System.out.println(\"[\u88c5\u9970\u4e0a\u5f39\u5323]\");\n        gun = new Magazine(gun);\n        System.out.println(\"[\u5f00\u70ae\uff01]\");\n        gun.fire();\n    }\n}\n\u8f93\u51fa\uff1a\n\n[\u6361\u8d77\u4e00\u628a98K]\n[\u5f00\u70ae\uff01]\n\u7830*5\n[\u88c5\u9970\u4e0a\u5f39\u5323]\n[\u5f00\u70ae\uff01]\n\u7830*10\n\u73b0\u5728\u6211\u8981\u88c5\u4e0a4\u500d\u955c\uff0c\u4f7f\u5b83\u5177\u67094\u500d\u7784\u51c6\u529f\u80fd\uff0c\u8fd9\u662f\u67aa\u652f\u539f\u672c\u6ca1\u6709\u7684\u529f\u80fd\u3002\n\n\u6269\u5c55\u67aa\u652f\u63a5\u53e3\u529f\u80fd\uff1a\n\npublic interface Aim4X extends Gun {\n    public void aim4X();\n}\n\npublic abstract class AbstractTelescope4X implements Aim4X {\n    private Gun gun;\n\n    public AbstractTelescope4X(Gun gun) {\n        this.gun = gun;\n    }\n\n    @Override\n    public void fire() {\n        gun.fire();\n    }\n}\n\npublic class Telescope4X extends AbstractTelescope4X {\n    public Telescope4X(Gun gun) {\n        super(gun);\n    }\n\n    @Override\n    public void aim4X() {\n        System.out.println(\"\u5df2\u8fdb\u51654\u500d\u7784\u51c6\u6a21\u5f0f\");\n    }\n}\n\n\/** * 55\u5f0f4\u500d\u955c *\/\npublic class Telescope4X55 extends AbstractTelescope4X {\n    public Telescope4X55(Gun gun) {\n        super(gun);\n    }\n\n    @Override\n    public void aim4X() {\n        System.out.println(\"4\u500d\u8d85\u7ea7\u7784\u51c6\u5df2\u90e8\u7f72\");\n    }\n}\n\u6d4b\u8bd5\uff1a\n\npublic class Demo {\n    public static void main(String[] args) {\n        System.out.println(\"[\u6361\u8d77\u4e00\u628a98K]\");\n        Gun gun = new Kar98K();\n        System.out.println(\"[\u88c5\u9970\u4e0a4\u500d\u955c]\");\n        Aim4X aim4X = new Telescope4X(gun);\n        System.out.println(\"[4\u500d\u7784\u51c6]\");\n        aim4X.aim4X();\n        System.out.println(\"[\u5f00\u70ae\uff01]\");\n        aim4X.fire();\n        System.out.println(\"[\u5148\u88c5\u9970\u4e0a\u5f39\u5323]\");\n        gun = new Magazine(gun);\n        System.out.println(\"[\u518d\u88c5\u9970\u4e0a4\u500d\u955c]\");\n        aim4X = new Telescope4X(gun);\n        System.out.println(\"[4\u500d\u7784\u51c6]\");\n        aim4X.aim4X();\n        System.out.println(\"[\u5f00\u70ae\uff01]\");\n        aim4X.fire();\n        System.out.println(\"[\u4eba\u4f53\u63cf\u8fb9\uff1f\u6362\u4e0a\u6211\u768455\u5f0f4\u500d\u955c]\");\n        aim4X = new Telescope4X55(gun);\n        System.out.println(\"[4\u500d\u7784\u51c6]\");\n        aim4X.aim4X();\n        System.out.println(\"[\u5f00\u70ae\uff01]\");\n        aim4X.fire();\n    }\n}\n\u8f93\u51fa\uff1a\n\n[\u6361\u8d77\u4e00\u628a98K]\n[\u88c5\u9970\u4e0a4\u500d\u955c]\n[4\u500d\u7784\u51c6]\n\u5df2\u8fdb\u51654\u500d\u7784\u51c6\u6a21\u5f0f\n[\u5f00\u70ae\uff01]\n\u7830*5\n[\u5148\u88c5\u9970\u4e0a\u5f39\u5323]\n[\u518d\u88c5\u9970\u4e0a4\u500d\u955c]\n[4\u500d\u7784\u51c6]\n\u5df2\u8fdb\u51654\u500d\u7784\u51c6\u6a21\u5f0f\n[\u5f00\u70ae\uff01]\n\u7830*10\n[\u4eba\u4f53\u63cf\u8fb9\uff1f\u6362\u4e0a\u6211\u768455\u5f0f4\u500d\u955c]\n[4\u500d\u7784\u51c6]\n4\u500d\u8d85\u7ea7\u7784\u51c6\u5df2\u90e8\u7f72\n[\u5f00\u70ae\uff01]\n\u7830*10\n\u73b0\u5728\u6211\u8981\u88c5\u4e0a8\u500d\u955c\uff0c\u5b83\u5177\u67094\u500d\u7784\u51c6\u529f\u80fd\uff0c\u4e5f\u5177\u67098\u500d\u7784\u51c6\u529f\u80fd\u3002\n\n\u6269\u5c55\u63a5\u53e3\uff1a\n\npublic interface Aim8X extends Aim4X {\n    public void aim8X();\n}\n\npublic abstract class AbstractTelescope8X implements Aim8X {\n    private Gun gun;\n\n    public AbstractTelescope8X(Gun gun) {\n        this.gun = gun;\n    }\n\n    @Override\n    public void fire() {\n        gun.fire();\n    }\n}\n\npublic class Telescope8X extends AbstractTelescope8X {\n    public Telescope8X(Gun gun) {\n        super(gun);\n    }\n\n    @Override\n    public void aim8X() {\n        System.out.println(\"\u8fdb\u51658\u500d\u7784\u51c6\u6a21\u5f0f\");\n    }\n\n    @Override\n    public void aim4X() {\n        System.out.println(\"\u8fdb\u51654\u500d\u7784\u51c6\u6a21\u5f0f\");\n    }\n}\n\u6d4b\u8bd5\uff1a\n\npublic class Demo {\n    public static void main(String[] args) {\n        System.out.println(\"[\u5148\u88c5\u9970\u4e0a\u5f39\u5323]\");\n        gun = new Magazine(gun);\n        System.out.println(\"[\u518d\u88c5\u9970\u4e0a8\u500d\u955c]\");\n        aim8X = new Telescope8X(gun);\n        System.out.println(\"[8\u500d\u7784\u51c6]\");\n        aim8X.aim8X();\n        System.out.println(\"[\u654c\u4eba\u5f88\u8fd1\uff0c\u63624\u500d]\");\n        aim8X.aim4X();\n        System.out.println(\"[\u5f00\u70ae\uff01]\");\n        aim8X.fire();\n    }\n}\n\u8f93\u51fa\uff1a\n\n[\u5148\u88c5\u9970\u4e0a\u5f39\u5323]\n[\u518d\u88c5\u9970\u4e0a8\u500d\u955c]\n[8\u500d\u7784\u51c6]\n\u8fdb\u51658\u500d\u7784\u51c6\u6a21\u5f0f\n[\u654c\u4eba\u5f88\u8fd1\uff0c\u63624\u500d]\u8fdb\u51654\u500d\u7784\u51c6\u6a21\u5f0f [\u5f00\u70ae\uff01] \u7830*10<\/pre>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u52a8\u6001\u7684\u7ed9\u5df2\u6709\u5bf9\u8c61\u6dfb\u52a0\u4e00\u4e9b\u529f\u80fd\uff0c\u4e0d\u6539\u53d8\u539f\u59cb\u7ed3\u6784\uff0c\u88c5\u9970\u5668\u6a21\u5f0f\u76f8\u6bd4\u751f\u6210\u5b50\u7c7b\u66f4\u4e3a\u7075\u6d3b\u3002 \u7f3a\u70b9\uff1a\u591a\u5c42\u88c5\u9970\u6bd4\u8f83\u590d\u6742\u3002 \u6211\u4eec [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[131],"tags":[],"_links":{"self":[{"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/1945"}],"collection":[{"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1945"}],"version-history":[{"count":14,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/1945\/revisions"}],"predecessor-version":[{"id":1962,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/1945\/revisions\/1962"}],"wp:attachment":[{"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1945"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1945"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1945"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}