{"id":252,"date":"2024-12-30T20:29:45","date_gmt":"2024-12-30T20:29:45","guid":{"rendered":"https:\/\/www.isvmspace.com\/?p=252"},"modified":"2024-12-30T20:29:45","modified_gmt":"2024-12-30T20:29:45","slug":"%e8%ae%be%e8%ae%a1%e6%a8%a1%e5%bc%8f-%e5%b7%a5%e5%8e%82%e6%a8%a1%e5%bc%8f","status":"publish","type":"post","link":"https:\/\/www.isvmspace.com\/?p=252","title":{"rendered":"\u8bbe\u8ba1\u6a21\u5f0f-\u5de5\u5382\u6a21\u5f0f"},"content":{"rendered":"<h1>\u7b80\u5355\u5de5\u5382<\/h1>\n<h2>\u5b9a\u4e49<\/h2>\n<p>\u7b80\u5355\u5de5\u5382\u6a21\u5f0f(Simple Factory Pattern)\u56e0\u4e3a\u5185\u90e8\u4f7f\u7528\u9759\u6001\u65b9\u6cd5\u6839\u636e\u4e0d\u540c\u53c2\u6570\u6784\u9020\u4e0d\u540c\u4ea7\u54c1\u5bf9\u8c61\u5b9e\u4f8b\uff0c\u4e5f\u79f0\u9759\u6001\u5de5\u5382\u65b9\u6cd5\u6a21\u5f0f\u3002<br \/>\n\u5728\u7b80\u5355\u5de5\u5382\u6a21\u5f0f\u4e2d\uff0c\u53ef\u4ee5\u6839\u636e\u53c2\u6570\u7684\u4e0d\u540c\u8fd4\u56de\u4e0d\u540c\u5b9e\u4f8b\u3002\u7b80\u5355\u5de5\u5382\u6a21\u5f0f\u4e13\u95e8\u5b9a\u4e49\u4e00\u4e2a\u7c7b\u6765\u8d1f\u8d23\u521b\u5efa\u5176\u4ed6\u7c7b\u7684\u5b9e\u4f8b\uff0c\u88ab\u521b\u5efa\u7684\u5b9e\u4f8b\u901a\u5e38\u90fd\u5177\u6709\u5171\u540c\u7684\u7236\u7c7b\u3002<\/p>\n<pre><code class=\"language-txt line-numbers\">\u7b80\u5355\u5730\u8bf4\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\n<\/code><\/pre>\n<h2>demo<\/h2>\n<pre><code class=\"language-java line-numbers\">public class SimpleFactoryPattern {\n    public static void main(String[] args) {\n        Animal animal = AnimalFactory.createAnimal(\"0\");\n        animal.name();\n\n        animal = AnimalFactory.createAnimal(\"1\");\n        animal.name();\n    }\n}\n\ninterface Animal {\n    void name();\n}\n\nclass Dog implements Animal {\n\n    @Override\n    public void name() {\n        System.out.println(\"I'm dog.\");\n    }\n}\n\nclass Cat implements Animal {\n    @Override\n    public void name() {\n        System.out.println(\"I'm cat.\");\n    }\n}\n\nclass AnimalFactory {\n\n    public static Animal createAnimal(String type) {\n        if (\"0\".equals(type)) {\n            return new Dog();\n        } else if (\"1\".equals(type)) {\n            return new Cat();\n        }\n        return null;\n    }\n}\n<\/code><\/pre>\n<h2>\u4f18\u70b9<\/h2>\n<p>1\uff09\u5b9e\u73b0\u8d77\u6765\u975e\u5e38\u7b80\u5355\uff0c\u4e5f\u5145\u5206\u5229\u7528\u4e86\u591a\u6001\u673a\u5236<br \/>\n2\uff09\u89e3\u8026(\u4f7f\u8c03\u7528\u7aef\u4e0d\u518d\u521b\u5efa\u5bf9\u8c61\uff0c\u800c\u662f\u4ea4\u7ed9\u5de5\u5382\u53bb\u521b\u5efa)\uff0c\u5e76\u4e14\u5bf9\u5185\u90e8\u5b9e\u73b0\u5c4f\u853d(\u8c03\u7528\u7aef\u4e0d\u77e5\u9053\u5177\u4f53\u5b9e\u73b0)<\/p>\n<h2>\u7f3a\u70b9<\/h2>\n<p>\u8fdd\u53cd\u5f00\u95ed\u539f\u5219(\u5bf9\u6269\u5c55\u5f00\u653e\uff0c\u5bf9\u4fee\u6539\u5173\u95ed)\uff0c\u5982\u679c\u6709\u4e00\u4e2a\u65b0\u7684\u5bf9\u8c61\u8981\u6dfb\u52a0\uff0c\u90a3\u4e48\u5c31\u8981\u4fee\u6539\u5de5\u5382<\/p>\n<h1>\u5de5\u5382\u65b9\u6cd5<\/h1>\n<h2>\u5b9a\u4e49<\/h2>\n<p>\u5b9a\u4e49\u4e00\u4e2a\u521b\u5efa\u4ea7\u54c1\u5bf9\u8c61\u7684\u5de5\u5382\u63a5\u53e3\uff0c\u5c06\u4ea7\u54c1\u5bf9\u8c61\u7684\u5b9e\u9645\u521b\u5efa\u5de5\u4f5c\u63a8\u8fdf\u5230\u5177\u4f53\u5b50\u5de5\u5382\u7c7b\u5f53\u4e2d\u3002<\/p>\n<h2>demo<\/h2>\n<pre><code class=\"language-java line-numbers\">public class Demo {\n\n    public static void main(String[] args) {\n        AnimalFactory animalFactory = new DogFactory();\n        Animal animal = animalFactory.createAnimal();\n        animal.name();\n\n        animalFactory = new CatFactory();\n        animal = animalFactory.createAnimal();\n        animal.name();\n    }\n}\n\n\ninterface Animal {\n    void name();\n}\n\nclass Dog implements Animal {\n\n    @Override\n    public void name() {\n        System.out.println(\"I'Demo dog.\");\n    }\n}\n\nclass Cat implements Animal {\n    @Override\n    public void name() {\n        System.out.println(\"I'Demo cat.\");\n    }\n}\n\ninterface AnimalFactory {\n    Animal createAnimal();\n}\n\nclass DogFactory implements AnimalFactory{\n\n    @Override\n    public Animal createAnimal() {\n        return new Dog();\n    }\n}\n\nclass CatFactory implements AnimalFactory {\n\n    @Override\n    public Animal createAnimal() {\n        return new Cat();\n    }\n}\n<\/code><\/pre>\n<h2>\u4f18\u70b9<\/h2>\n<p>1\uff09\u7528\u6237\u53ea\u9700\u8981\u77e5\u9053\u5177\u4f53\u5de5\u5382\u7684\u540d\u79f0\u5c31\u53ef\u5f97\u5230\u6240\u8981\u7684\u4ea7\u54c1\uff0c\u65e0\u987b\u77e5\u9053\u4ea7\u54c1\u7684\u5177\u4f53\u521b\u5efa\u8fc7\u7a0b\uff1b<br \/>\n2\uff09\u5728\u7cfb\u7edf\u589e\u52a0\u65b0\u7684\u4ea7\u54c1\u65f6\u53ea\u9700\u8981\u6dfb\u52a0\u5177\u4f53\u4ea7\u54c1\u7c7b\u548c\u5bf9\u5e94\u7684\u5177\u4f53\u5de5\u5382\u7c7b\uff0c\u65e0\u987b\u5bf9\u539f\u5de5\u5382\u8fdb\u884c\u4efb\u4f55\u4fee\u6539\uff0c\u6ee1\u8db3\u5f00\u95ed\u539f\u5219\uff1b<\/p>\n<h2>\u7f3a\u70b9<\/h2>\n<p>1\uff09\u6bcf\u589e\u52a0\u4e00\u4e2a\u4ea7\u54c1\u5c31\u8981\u589e\u52a0\u4e00\u4e2a\u5177\u4f53\u4ea7\u54c1\u7c7b\u548c\u4e00\u4e2a\u5bf9\u5e94\u7684\u5177\u4f53\u5de5\u5382\u7c7b\uff0c\u8fd9\u589e\u52a0\u4e86\u7cfb\u7edf\u7684\u590d\u6742\u5ea6\u3002<\/p>\n<h2>\u9002\u7528\u573a\u666f<\/h2>\n<p>1\uff09\u5f53\u4e00\u4e2a\u7c7b\u4e0d\u77e5\u9053\u5b83\u6240\u9700\u8981\u521b\u5efa\u7684\u5bf9\u8c61\u7684\u7c7b\u7684\u65f6\u5019<br \/>\n2\uff09\u5f53\u4e00\u4e2a\u7c7b\u5e0c\u671b\u53c8\u5b83\u7684\u5b50\u7c7b\u6765\u6307\u5b9a\u5b83\u521b\u5efa\u7684\u5bf9\u8c61\u7684\u65f6\u5019<br \/>\n3\uff09\u5f53\u7c7b\u5c06\u521b\u5efa\u5bf9\u8c61\u7684\u804c\u8d23\u59d4\u6258\u7ed9\u591a\u4e2a\u5e2e\u52a9\u5b50\u7c7b\u4e2d\u7684\u67d0\u4e00\u4e2a\uff0c\u5e76\u4e14\u4f60\u5e0c\u671b\u5c06\u54ea\u4e00\u4e2a\u5e2e\u52a9\u5b50\u7c7b\u662f\u4ee3\u7406\u8005\u8fd9\u4e00\u4fe1\u606f\u5c40\u90e8\u5316\u7684\u65f6\u5019<\/p>\n<h2>\u6848\u4f8b<\/h2>\n<p>Spring\u6709\u4e24\u4e2a\u6838\u5fc3\u63a5\u53e3\uff1aBeanFactory\u548cApplicationContext\uff0c\u5176\u4e2dApplicationContext\u662fBeanFactory\u7684\u5b50\u63a5\u53e3\uff0c\u4ed6\u4eec\u90fd\u53ef\u4ee3\u8868Spring\u5bb9\u5668\uff0cSpring\u5bb9\u5668\u662f\u751f\u6210Bean\u5b9e\u4f8b\u7684\u5de5\u5382\uff0c\u5e76\u4e14\u7ba1\u7406\u5bb9\u5668\u4e2d\u7684Bean<\/p>\n<p>BeanFactory\u63a5\u53e3\u5305\u542b\u4e86getBean\u65b9\u6cd5<\/p>\n<p>Object getBean(String name)\uff1a\u8fd4\u56deSprin\u5bb9\u5668\u4e2did\u4e3aname\u7684Bean\u5b9e\u4f8b\u3002<\/p>\n<p>\u8c03\u7528\u8005\u53ea\u9700\u4f7f\u7528getBean()\u65b9\u6cd5\u5373\u53ef\u83b7\u5f97\u6307\u5b9aBean\u7684\u5f15\u7528\uff0c\u65e0\u987b\u5173\u5fc3Bean\u7684\u5b9e\u4f8b\u5316\u8fc7\u7a0b\u3002\u5373Bean\u5b9e\u4f8b\u7684\u521b\u5efa\u8fc7\u7a0b\u5b8c\u5168\u900f\u660e\u3002<br \/>\n\u5728\u4f7f\u7528BeanFactory\u63a5\u53e3\u65f6\uff0c\u4e00\u822c\u90fd\u662f\u4f7f\u7528\u8fd9\u4e2a\u5b9e\u73b0\u7c7b\uff1aorg.springframework.beans.factory.xml.XmlBeanFactory\u3002\u7136\u800cApplicationContext\u4f5c\u4e3aBeanFactory\u7684\u5b50\u63a5\u53e3\uff0c\u4f7f\u7528\u5b83\u4f5c\u4e3aSpring\u5bb9\u5668\u4f1a\u66f4\u52a0\u65b9\u4fbf\u3002\u5b83\u7684\u5b9e\u73b0\u7c7b\u6709\uff1aFileSystemXmlApplicationContext\u3001ClassPathXmlApplicationContext\u3001AnnotationConfigApplicationContext\u3002<\/p>\n<h1>\u62bd\u8c61\u5de5\u5382<\/h1>\n<h2>\u5b9a\u4e49<\/h2>\n<p>\u63d0\u4f9b\u4e86\u4e00\u4e2a\u521b\u5efa\u4e00\u7cfb\u5217\u76f8\u5173\u6216\u76f8\u4e92\u4f9d\u8d56\u5bf9\u8c61\u7684\u63a5\u53e3\uff0c\u800c\u65e0\u9700\u6307\u5b9a\u4ed6\u4eec\u5177\u4f53\u7684\u7c7b\u3002<\/p>\n<p>\u62bd\u8c61\u5de5\u5382\u6a21\u5f0f\u662f\u5de5\u5382\u65b9\u6cd5\u6a21\u5f0f\u7684\u5347\u7ea7\u7248\u672c\uff0c\u5de5\u5382\u65b9\u6cd5\u6a21\u5f0f\u53ea\u751f\u4ea7\u4e00\u4e2a\u7b49\u7ea7\u7684\u4ea7\u54c1\uff0c\u800c\u62bd\u8c61\u5de5\u5382\u6a21\u5f0f\u53ef\u751f\u4ea7\u591a\u4e2a\u7b49\u7ea7\u7684\u4ea7\u54c1\u3002<\/p>\n<pre><code class=\"language-java line-numbers\">public class Demo {\n    public static void main(String[] args) {\n        AnimalFactory animalFactory = new SparrowFactory();\n\n        Species species = animalFactory.createSpecies();\n        species.name();\n\n        LifeStyle lifeStyle = animalFactory.createLifeStyle();\n        lifeStyle.style();\n\n    }\n}\n\n\n\/\/ \u751f\u6d3b\u65b9\u5f0f\ninterface LifeStyle {\n    void style();\n}\n\n\/\/ \u6c34\u91cc\u751f\u6d3b\nclass Water implements LifeStyle {\n\n\n    @Override\n    public void style() {\n        System.out.println(\"\u751f\u6d3b\u5728\u6c34\u91cc\");\n    }\n}\n\n\/\/ \u9646\u5730\u751f\u6d3b\nclass Terrestrial implements LifeStyle {\n    @Override\n    public void style() {\n        System.out.println(\"\u9646\u5730\u751f\u6d3b\");\n    }\n}\n\n\/\/ \u7269\u79cd\ninterface Species {\n    void name();\n}\n\nclass Bird implements Species {\n    @Override\n    public void name() {\n        System.out.println(\"\u6211\u662f\u9e1f\u7c7b!\");\n    }\n}\n\nclass Fish implements Species {\n    @Override\n    public void name() {\n        System.out.println(\"\u6211\u662f\u9c7c\u7c7b!\");\n    }\n}\n\n\/\/ \u52a8\u7269\u5de5\u5382\ninterface AnimalFactory {\n    LifeStyle createLifeStyle();\n\n    Species createSpecies();\n}\n\n\/\/ \u9ebb\u96c0\nclass SparrowFactory implements AnimalFactory{\n\n    @Override\n    public LifeStyle createLifeStyle() {\n        return new Terrestrial();\n    }\n\n    @Override\n    public Species createSpecies() {\n        return new Bird();\n    }\n}\n\n\/\/ \u9ca4\u9c7c\nclass CarpFactory implements AnimalFactory{\n    @Override\n    public LifeStyle createLifeStyle() {\n        return new Water();\n    }\n\n    @Override\n    public Species createSpecies() {\n        return new Fish();\n    }\n}\n<\/code><\/pre>\n<h2>\u4f18\u70b9\uff1a<\/h2>\n<p>1)\u5177\u5907\u548c\u5de5\u5382\u65b9\u6cd5\u6a21\u5f0f\u4e00\u6837\u7684\u4f18\u70b9<br 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[&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17],"tags":[],"_links":{"self":[{"href":"https:\/\/www.isvmspace.com\/index.php?rest_route=\/wp\/v2\/posts\/252"}],"collection":[{"href":"https:\/\/www.isvmspace.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.isvmspace.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.isvmspace.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.isvmspace.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=252"}],"version-history":[{"count":1,"href":"https:\/\/www.isvmspace.com\/index.php?rest_route=\/wp\/v2\/posts\/252\/revisions"}],"predecessor-version":[{"id":253,"href":"https:\/\/www.isvmspace.com\/index.php?rest_route=\/wp\/v2\/posts\/252\/revisions\/253"}],"wp:attachment":[{"href":"https:\/\/www.isvmspace.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=252"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.isvmspace.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=252"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.isvmspace.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=252"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}