{"id":1114,"date":"2023-03-12T20:00:14","date_gmt":"2023-03-12T12:00:14","guid":{"rendered":"https:\/\/www.appblog.cn\/?p=1114"},"modified":"2023-04-29T11:22:51","modified_gmt":"2023-04-29T03:22:51","slug":"design-pattern-factory-method-pattern","status":"publish","type":"post","link":"https:\/\/www.appblog.cn\/index.php\/2023\/03\/12\/design-pattern-factory-method-pattern\/","title":{"rendered":"\u8bbe\u8ba1\u6a21\u5f0f\uff085\uff09\u5de5\u5382\u65b9\u6cd5\u6a21\u5f0f"},"content":{"rendered":"

\u5b9a\u4e49<\/h2>\n

\u5b9a\u4e49\u4e00\u4e2a\u7528\u4e8e\u521b\u5efa\u5bf9\u8c61\u7684\u63a5\u53e3\uff0c\u8ba9\u5b50\u7c7b\u51b3\u5b9a\u5b9e\u4f8b\u5316\u90a3\u4e2a\u7c7b\u3002<\/p>\n

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\u5728\u4efb\u4f55\u9700\u751f\u6210\u590d\u6742\u5bf9\u8c61\u7684\u5730\u65b9\uff0c\u90fd\u53ef\u4ee5\u4f7f\u7528\u5de5\u5382\u65b9\u6cd5\u6a21\u5f0f\u3002\u590d\u6742\u5bf9\u8c61\u9002\u5408\u4f7f\u7528\u5de5\u5382\u6a21\u5f0f\uff0c\u7528new\u5c31\u53ef\u4ee5\u5b8c\u6210\u521b\u5efa\u7684\u5bf9\u8c61\u65e0\u9700\u4f7f\u7528\u5de5\u5382\u6a21\u5f0f\u3002<\/p>\n

\u6a21\u5f0f\u7684\u7b80\u5355\u5b9e\u73b0<\/h2>\n

\u62bd\u8c61\u4ea7\u54c1\u7c7b\uff1a<\/p>\n

public abstract class Product {\n    \/**\n     * \u4ea7\u54c1\u7c7b\u7684\u62bd\u8c61\u65b9\u6cd5\n     * \u7531\u5177\u4f53\u7684\u4ea7\u54c1\u7c7b\u53bb\u5b9e\u73b0\n     * *\/\n    public abstract void method();\n}<\/code><\/pre>\n
\u5177\u4f53\u4ea7\u54c1\u7c7bA\uff1a<\/p>\n
public class ConcreteProductA extends Product {\n\n    @Override\n    public void method() {\n        System.out.println("\u6211\u662f\u4ea7\u54c1A");\n    }\n}<\/code><\/pre>\n
\u5177\u4f53\u4ea7\u54c1\u7c7bB\uff1a<\/p>\n
public class ConcreteProductB extends Product {\n\n    @Override\n    public void method() {\n        System.out.println("\u6211\u662f\u4ea7\u54c1B");\n    }\n}<\/code><\/pre>\n
\u62bd\u8c61\u5de5\u5382\u7c7b\uff1a<\/p>\n
public abstract class Factory {\n    \/**\n     * \u62bd\u8c61\u5de5\u5382\u65b9\u6cd5\n     * \u5177\u4f53\u7531\u5b50\u7c7b\u5b9e\u73b0\n     * \n     * @return \u5177\u4f53\u7684\u4ea7\u54c1\u5bf9\u8c61\n     * *\/\n    public abstract Product createProduct();\n}<\/code><\/pre>\n
\u5177\u4f53\u5de5\u5382\u7c7b\uff1a<\/p>\n
public class ConcreteFactory extends Factory {\n    \/**\n     * \u5177\u4f53\u5de5\u5382\u7c7b\n     * *\/\n    @Override\n    public Product createProduct() {\n        return new ConcreteProductA();\n    }\n}<\/code><\/pre>\n
\u8c03\u7528\uff1a<\/p>\n
public class Client {\n    public static void main(String[] args) {\n        Factory factory = new ConcreteFactory();\n        Product product = factory.createProduct();\n        product.method();\n    }\n}<\/code><\/pre>\n
\u7ed3\u679c\uff1a<\/p>\n
\u6211\u662f\u4ea7\u54c1A<\/code><\/pre>\n
\u5982\u679c\u60f3\u5f97\u5230ConcreteProductB\u7684\u5b9e\u4f8b\uff0c\u66f4\u6539ConcreteFactory\u903b\u8f91\uff1a<\/p>\n
public class ConcreteFactory extends Factory {\n    \/**\n     * \u5177\u4f53\u5de5\u5382\u7c7b\n     * *\/\n    @Override\n    public Product createProduct() {\n        \/\/return new ConcreteProductA();\n        return new ConcreteProductB();\n    }\n}<\/code><\/pre>\n
\u4e0a\u9762\u8fd9\u79cd\u65b9\u5f0f\u53ef\u80fd\u4e0d\u662f\u5f88\u7075\u6d3b\uff0c\u53ef\u4ee5\u5229\u7528\u53cd\u5c04\u5b9e\u73b0\uff0c\u5982\u4e0b\uff1a<\/p>\n
public abstract class Factory {\n    \/**\n     * \u62bd\u8c61\u5de5\u5382\u65b9\u6cd5\n     * \u5177\u4f53\u7531\u5b50\u7c7b\u5b9e\u73b0\n     * \n     * @param clz \u4ea7\u54c1\u5bf9\u8c61\u7c7b\u7c7b\u578b\n     * \n     * @return \u5177\u4f53\u7684\u4ea7\u54c1\u5bf9\u8c61\n     * *\/\n    public abstract <T extends Product> T createProduct(Class<T> clz);\n}<\/code><\/pre>\n
\u5177\u4f53\u5de5\u5382\u7c7b\u4fee\u6539\uff1a<\/p>\n
public class ConcreteFactory extends Factory {\n    \/**\n     * \u5177\u4f53\u5de5\u5382\u7c7b\n     * *\/\n    @SuppressWarnings("unchecked")\n    @Override\n    public <T extends Product> T createProduct(Class<T> clz) {\n        Product product = null;\n        try {\n            product = (Product) Class.forName(clz.getName()).newInstance();\n        } catch (Exception e) {\n            e.printStackTrace();\n        }\n        return (T)product;\n    }\n}<\/code><\/pre>\n
Client\u5b9e\u73b0\uff1a<\/p>\n
public class Client {\n    public static void main(String[] args) {\n        Factory factory = new ConcreteFactory();\n        Product product = factory.createProduct(ConcreteProductB.class);\n        product.method();\n    }\n}<\/code><\/pre>\n
\u5982\u679c\u6211\u4eec\u7684\u5de5\u5382\u53ea\u6709\u4e00\u4e2a\uff0c\u6211\u4eec\u53ef\u4ee5\u8fdb\u884c\u7b80\u5316\uff0c\u8fd9\u79cd\u65b9\u5f0f\u53c8\u79f0\u4e3a\u7b80\u5355\u5de5\u5382\u6a21\u5f0f\u6216\u8005\u9759\u6001\u5de5\u5382\u6a21\u5f0f\u3002\u5982\u4e0b\uff1a<\/p>\n
public class Factory {\n    \/**\n     * \u62bd\u8c61\u5de5\u5382\u65b9\u6cd5\n     * \u5177\u4f53\u7531\u5b50\u7c7b\u5b9e\u73b0\n     * \n     * @param clz \u4ea7\u54c1\u5bf9\u8c61\u7c7b\u7c7b\u578b\n     * \n     * @return \u5177\u4f53\u7684\u4ea7\u54c1\u5bf9\u8c61\n     * *\/\n    public static <T extends Product> T createProduct(Class<T> clz) {\n        Product product = null;\n        try {\n            product = (Product) Class.forName(clz.getName()).newInstance();\n        } catch (Exception e) {\n            e.printStackTrace();\n        }\n        return (T)product;\n    }\n}<\/code><\/pre>\n
Android\u6e90\u7801\u4e2d\u7684\u5de5\u5382\u65b9\u6cd5\u6a21\u5f0f<\/h2>\n
    \n
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    Activity\u7684\u5404\u79cd\u751f\u547d\u5468\u671f<\/p>\n<\/li>\n
  • \n
    ArrayList\u548cHashSet<\/p>\n<\/li>\n<\/ul>\n
    \u603b\u7ed3<\/h2>\n
    \u4f18\u70b9\uff1a<\/p>\n
    \uff081\uff09\u5de5\u5382\u65b9\u6cd5\u6a21\u5f0f\u5b8c\u5168\u7b26\u5408\u8bbe\u8ba1\u539f\u5219\uff0c\u964d\u4f4e\u4e86\u5bf9\u8c61\u4e4b\u95f4\u7684\u8026\u5408\u3002\u9ad8\u5c42\u6a21\u5757\u53ea\u9700\u8981\u77e5\u9053\u4ea7\u54c1\u7684\u62bd\u8c61\u7c7b\uff0c\u5176\u4ed6\u7684\u5b9e\u73b0\u90fd\u4e0d\u9700\u8981\u5173\u5fc3\u3002
    \n\uff082\uff09\u826f\u597d\u7684\u5c01\u88c5\u6027\uff0c\u4ee3\u7801\u7ed3\u6784\u6e05\u6670\u3002\u6269\u5c55\u6027\u597d\u3002<\/p>\n
    \u7f3a\u70b9\uff1a<\/p>\n
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    \u5b9a\u4e49 \u5b9a\u4e49\u4e00\u4e2a\u7528\u4e8e\u521b\u5efa\u5bf9\u8c61\u7684\u63a5\u53e3\uff0c\u8ba9\u5b50\u7c7b\u51b3\u5b9a\u5b9e\u4f8b\u5316\u90a3\u4e2a\u7c7b\u3002 \u4f7f\u7528\u573a\u666f \u5728\u4efb\u4f55\u9700\u751f\u6210\u590d\u6742\u5bf9\u8c61\u7684\u5730\u65b9\uff0c\u90fd\u53ef\u4ee5\u4f7f\u7528\u5de5 […]<\/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-1114","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\/1114","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=1114"}],"version-history":[{"count":0,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/1114\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/media?parent=1114"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/categories?post=1114"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/tags?post=1114"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}