{"id":2158,"date":"2022-03-25T17:03:34","date_gmt":"2022-03-25T09:03:34","guid":{"rendered":"http:\/\/47.101.202.111\/?p=2158"},"modified":"2023-04-04T23:12:18","modified_gmt":"2023-04-04T15:12:18","slug":"%e6%b7%b1%e5%85%a5%e6%b5%85%e5%87%ba%e5%b7%a5%e5%8e%82%e6%a8%a1%e5%bc%8f","status":"publish","type":"post","link":"http:\/\/139.196.114.170\/?p=2158","title":{"rendered":"\u6df1\u5165\u6d45\u51fa\u5de5\u5382\u6a21\u5f0f"},"content":{"rendered":"

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public class Client {\n    public static void main(String[] args) {\n        Product product = SimpleFactory.getBean(RequestString.PRODUCT_TYPE_A);\n        product.processProduct();\n    }\n}<\/code><\/pre>\n
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\npublic class SimpleFactory {\n    public static Product getBean(String type) {\n        if (RequestString.PRODUCT_TYPE_A.equals(type)) {\n            return new ProductA();\n        } else if (RequestString.PRODUCT_TYPE_B.equals(type)) {\n            return new ProductB();\n        } else return null;\n    }\n}\n\npublic class RequestString {\n    public static String PRODUCT_TYPE_A = \"A\";\n    public static String PRODUCT_TYPE_B = \"B\";\n}\n<\/pre>\n
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\npublic abstract class Product {\n    public abstract void processProduct();\n    public Product() {}\n}\n\npublic class ProductA extends Product{\n    @Override\n    public void processProduct() {\n        System.out.println(\"process ProductA method\");\n    }\n}\n\npublic class ProductB extends Product{\n    @Override\n    public void processProduct() {\n        System.out.println(\"process ProductB method\");\n    }\n}\n<\/pre>\n
\"simple-factory-uml\"<\/p>\n
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\u5de5\u5382\u6a21\u5f0f<\/h3>\n
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\npublic abstract class Factory {\n    public Product getProduct(String type) {\n        Product product = factoryMethod(type);\n        product.processProduct();\n        return product;\n    }\n\n    public abstract Product factoryMethod (String type) {}\n}\n\npublic class ProductAFactory extends Factory {\n    @Override\n    public Product factoryMethod (String type) {\n        if (RequestString.PRODUCT_TYPE_ONE.equals(type)) {\n            return new ProductA1();\n        } else if (RequestString.PRODUCT_TYPE_TWO.equals(type)) {\n            return new ProductA2();\n        } else return null;\n    }\n}\n\npublic class ProductBFactory extends Factory {\n    @Override\n    public Product factoryMethod (String type) {\n        if (RequestString.PRODUCT_TYPE_ONE.equals(type)) {\n            return new ProductB1();\n        } else if (RequestString.PRODUCT_TYPE_TWO.equals(type)) {\n            return new ProductB2();\n        } else return null;\n    }\n}\n\npublic abstract class Product {\n    public abstract void processProduct();\n    public Product() {}\n}\n\npublic class ProductA1 extends Product{\n    @Override\n    public void processProduct() {\n        System.out.println(\"process A1\");\n    }\n}\n\npublic class ProductA2 extends Product{\n    @Override\n    public void processProduct() {\n        System.out.println(\"process A2\");\n    }\n}\n\npublic class ProductB1 extends Product{\n    @Override\n    public void processProduct() {\n        System.out.println(\"process B1\");\n    }\n}\n\npublic class ProductB2 extends Product{\n    @Override\n    public void processProduct() {\n        System.out.println(\"process B2\");\n    }\n}\n\npublic class RequestString {\n    public static String PRODUCT_TYPE_ONE = \"1\";\n    public static String PRODUCT_TYPE_TWO = \"2\";\n}\n\npublic class Client {\n    public static void main(String[] args) {\n        Factory factory = new ProductBFactory();\n        Product product = factory.getProduct(RequestString.PRODUCT_TYPE_ONE);\n    }\n}\n<\/pre>\n
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\u4e00\u4e2a\u5de5\u5382\u751f\u4ea7\u4e00\u79cd\u4ea7\u54c1\u7684\u5404\u4e2a\u7ec4\u4ef6<\/p>\n
\npublic interface Factory {\n    public ComponentOne factoryMethodPartOne();\n    public ComponentTwo factoryMethodPartTwo();\n}\n\npublic class ProductAFactory implements Factory {\n    @Override\n    public ComponentOne factoryMethodPartOne() {\n        return new AComponentOne();\n    }\n    @Override\n    public ComponentTwo factoryMethodPartTwo() {\n        return new AComponentTwo();\n    }\n}\n\npublic class ProductBFactory implements Factory {\n    @Override\n    public ComponentOne factoryMethodPartOne() {\n        return new BComponentOne();\n    }\n    @Override\n    public ComponentTwo factoryMethodPartTwo() {\n        return new BComponentTwo();\n    }\n}\n\npublic abstract class Product {\n    ComponentOne c1;\n    ComponentTwo c2;\n    public abstract void processProduct();\n    public Product(Factory factory) {\n        c1 = factory.factoryMethodPartOne();\n        c2 = factory.factoryMethodPartTwo();\n    }\n}\n\npublic class ProductA extends Product{\n    @Override\n    public void processProduct() {\n        System.out.println(\"process A1\");\n    }\n}\n\npublic class ProductB extends Product{\n    @Override\n    public void processProduct() {\n        System.out.println(\"process A2\");\n    }\n}\n\npublic class Client {\n    public static void main(String[] args) {\n        Factory factory = new ProductAFactory();\n        Product product = new ProductA(factory);\n        product.processProduct();\n    }\n}\n<\/pre>\n","protected":false},"excerpt":{"rendered":"
\u4f7f\u7528\u573a\u666f\u53ca\u89e3\u51b3\u95ee\u9898 \u521b\u5efa\u5bf9\u8c61\u7684\u4e1a\u52a1\u53d1\u751f\u6539\u53d8\u65f6\uff0c\u6240\u6709\u5305\u542b\u8be5\u4e1a\u52a1\u7684\u65b9\u6cd5\u90fd\u8981\u53bb\u7ef4\u62a4\u4ee3\u7801 \u5de5\u5382\u6a21\u5f0f\u672c\u8d28\u662f \u5c01\u88c5\u4e86\u521b\u5efa\u5bf9 … <\/p>\n
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