{"id":1070,"date":"2024-05-25T16:53:34","date_gmt":"2024-05-25T08:53:34","guid":{"rendered":"http:\/\/www.spiceandwolf.com.cn\/?p=1070"},"modified":"2024-09-15T10:06:51","modified_gmt":"2024-09-15T02:06:51","slug":"design-pattern-template-method-pattern","status":"publish","type":"post","link":"http:\/\/www.spiceandwolf.com.cn\/index.php\/design-pattern-template-method-pattern\/","title":{"rendered":"\u8bbe\u8ba1\u6a21\u5f0f-\u6a21\u7248\u65b9\u6cd5\u6a21\u5f0f"},"content":{"rendered":"\n<p>\u6a21\u7248\u65b9\u6cd5\u6a21\u5f0f\u5728\u4e00\u4e2a\u65b9\u6cd5\u4e2d\u5b9a\u4e49\u4e00\u4e2a\u7b97\u6cd5\u7684\u9aa8\u67b6\uff0c\u800c\u5c06\u4e00\u4e9b\u6b65\u9aa4\u5ef6\u8fdf\u5230\u5b50\u7c7b\u4e2d\u3002\u6a21\u7248\u65b9\u6cd5\u4f7f\u5f97\u5b50\u7c7b\u53ef\u4ee5\u5728\u4e0d\u6539\u53d8\u7b97\u6cd5\u7ed3\u6784\u7684\u60c5\u51b5\u4e0b\uff0c\u91cd\u65b0\u5b9a\u4e49\u7b97\u6cd5\u4e2d\u7684\u67d0\u4e9b\u6b65\u9aa4\u3002<\/p>\n\n\n\n<p>\u6211\u4eec\u4ee5\u5496\u5561\u548c\u8336\u4e3a\u4f8b\uff0c\u4e3e\u4f8b\u5982\u4f55\u5c06\u5496\u5561\u548c\u8336\u7684\u51b2\u6ce1\u4ee3\u7801\u6574\u5408\u5230\u4e00\u4e2a\u6a21\u7248\u65b9\u6cd5\u4e2d\u3002<\/p>\n\n\n\n<p>\u9996\u5148\u8fd9\u662f\u5496\u5561\u548c\u8336\u7684\u539f\u672c\u5b9e\u73b0\u65b9\u5f0f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public class Coffee {\n    public void prepareRecipe() {\n        boilWafer();\n        brewCoffeeGrinds();\n        pourInCup();\n        addSugarAndMilk();\n    }\n\n    public void boilWafer() {\n        System.out.println(\"Boiling wafer\");\n    }\n\n    public void brewCoffeeGrinds() {\n        System.out.println(\"Dripping Coffee through filter\");\n    }\n\n    public void pourInCup() {\n        System.out.println(\"Pouring into cup\");\n    }\n\n    public void addSugarAndMilk() {\n        System.out.println(\"Adding Sugar and Milk\");\n    }\n}<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>public class Tea {\n    public void prepareRecipe() {\n        boilWafer();\n        steepTeaBag();\n        pourInCup();\n        addLemon();\n    }\n\n    public void boilWafer() {\n        System.out.println(\"Boiling wafer\");\n    }\n\n    public void steepTeaBag() {\n        System.out.println(\"Steeping the tea\");\n    }\n\n    public void addLemon() {\n        System.out.println(\"Adding Lemon\");\n    }\n\n    public void pourInCup() {\n        System.out.println(\"Pouring into cup\");\n    }\n}<\/code><\/pre>\n\n\n\n<p>\u53ef\u4ee5\u770b\u51fa\u5496\u5561\u548c\u8336\u7684\u51b2\u6ce1\u65b9\u5f0f\u90fd\u662f\u7c7b\u4f3c\u7684\uff0c\u7b2c\u4e00\u6b65\u90fd\u662f\u70e7\u5f00\u6c34\uff0c\u7136\u540e\u51b2\u6ce1\u6599\u5305\uff0c\u7d27\u63a5\u7740\u5c06\u996e\u54c1\u5012\u5165\u676f\u4e2d\uff0c\u6700\u540e\u52a0\u5165\u8c03\u6599\u3002\u6240\u4ee5\u6211\u4eec\u5c06\u8fd9\u4e2a\u5171\u6027\u7684\u51b2\u6ce1\u6d41\u7a0b\u62bd\u8c61\u6210\u6a21\u7248\uff0c\u5f62\u6210\u7b2c\u4e8c\u7248\u8bbe\u8ba1\u65b9\u6848\uff1a<\/p>\n\n\n\n<p>\u9996\u5148\u7f16\u5199\u51fa\u51b2\u6ce1\u996e\u6599\u7684\u6a21\u7248\u65b9\u6cd5\u4ee3\u7801\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public abstract class CaffeineBeverage {\n    final void prepareRecipe() {\n        boilWafer();\n        brew();\n        pourInCup();\n        addCondiments();\n    }\n\n    abstract void brew();\n\n    abstract void addCondiments();\n\n    void boilWafer() {\n        System.out.println(\"Boiling wafer\");\n    }\n\n    void pourInCup() {\n        System.out.println(\"Pouring into cup\");\n    }\n}<\/code><\/pre>\n\n\n\n<p>\u7136\u540e\u6240\u6709\u7c7b\u4f3c\u7684\u996e\u54c1\u90fd\u5b9e\u73b0\u6a21\u7248\u65b9\u6cd5\u7684\u62bd\u8c61\u7c7b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public class Coffee extends CaffeineBeverage {\n    @Override\n    void brew() {\n        System.out.println(\"Dripping Coffe through filter\");\n    }\n\n    @Override\n    void addCondiments() {\n        System.out.println(\"Adding Sugar and Milk\");\n    }\n}<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>public class Tea extends CaffeineBeverage {\n    @Override\n    void brew() {\n        System.out.println(\"Steeping the tea\");\n    }\n\n    @Override\n    void addCondiments() {\n        System.out.println(\"Adding Lemon\");\n    }\n}<\/code><\/pre>\n\n\n\n<p>\u4e0a\u9762\u4ee3\u7801\u5c31\u901a\u8fc7\u6a21\u7248\u65b9\u6cd5\u62bd\u8c61\u51fa\u4e86\u540c\u7c7b\u996e\u6599\u7684\u51b2\u6ce1\u6b65\u9aa4\uff0c\u8fd9\u6837\u5c31\u80fd\u6700\u5927\u9650\u5ea6\u4e0a\u590d\u7528\u91cd\u590d\u7684\u4ee3\u7801\uff0c\u901a\u8fc7\u5728\u5b50\u7c7b\u4e2d\u5b9e\u73b0\u7ec6\u8282\u533a\u522b\u6765\u51cf\u5c11\u4ee3\u7801\u7684\u8026\u5408\u6027\u3002<\/p>\n\n\n\n<p>\u6a21\u7248\u65b9\u6cd5\u7684\u7c7b\u56fe\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"739\" src=\"http:\/\/www.spiceandwolf.com.cn\/wp-content\/uploads\/2024\/05\/image-17-1024x739.png\" alt=\"\" class=\"wp-image-1071\" style=\"width:736px;height:auto\" srcset=\"http:\/\/www.spiceandwolf.com.cn\/wp-content\/uploads\/2024\/05\/image-17-1024x739.png 1024w, http:\/\/www.spiceandwolf.com.cn\/wp-content\/uploads\/2024\/05\/image-17-300x217.png 300w, http:\/\/www.spiceandwolf.com.cn\/wp-content\/uploads\/2024\/05\/image-17-768x554.png 768w, http:\/\/www.spiceandwolf.com.cn\/wp-content\/uploads\/2024\/05\/image-17-750x540.png 750w, http:\/\/www.spiceandwolf.com.cn\/wp-content\/uploads\/2024\/05\/image-17-110x80.png 110w, http:\/\/www.spiceandwolf.com.cn\/wp-content\/uploads\/2024\/05\/image-17.png 1230w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>\u6a21\u7248\u65b9\u6cd5\u7684\u4e00\u822c\u5b9e\u73b0\u5f62\u5f0f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public abstract class AbstractClass {\n    \n    public final void templateMethod() {\n        primitiveOperation1();\n        primitiveOperation2();\n        concreteOperation();\n    }\n    \n    public abstract void primitiveOperation1();\n    \n    public abstract void primitiveOperation2();\n    \n    public void concreteOperation() {\n        \n    }\n}<\/code><\/pre>\n\n\n\n<p>\u6211\u4eec\u53ef\u4ee5\u5728\u6a21\u7248\u65b9\u6cd5\u4e2d\u52a0\u5165\u4e00\u4e9b\u7528\u6cd5\u6765\u589e\u52a0\u6a21\u7248\u65b9\u6cd5\u6a21\u5f0f\u7684\u5f39\u6027\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public abstract class CaffeineBeverageWithHook {\n    final void prepareRecipe() {\n        boilWafer();\n        brew();\n        pourInCup();\n        if (customerWantsConditions()) {\n            addCondiments();\n        }\n    }\n\n    abstract void brew();\n\n    abstract void addCondiments();\n\n    void boilWafer() {\n        System.out.println(\"Boiling wafer\");\n    }\n\n    void pourInCup() {\n        System.out.println(\"Pouring into cup\");\n    }\n\n    boolean customerWantsConditions() {\n        return true;\n    }\n}<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>public class CoffeeWithHook extends CaffeineBeverageWithHook {\n    @Override\n    void brew() {\n        System.out.println(\"Dripping Coffe through filter\");\n    }\n\n    @Override\n    void addCondiments() {\n        System.out.println(\"Adding Sugar and Milk\");\n    }\n\n    @Override\n    public boolean customerWantsConditions() {\n        String answer = getUserInput();\n\n        if (answer.toLowerCase().startsWith(\"y\")) {\n            return true;\n        } else {\n            return false;\n        }\n    }\n\n    private String getUserInput() {\n        String answer = null;\n\n        System.out.println(\"Would you like milk and sugar with your coffee (y\/n)?\");\n\n        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));\n        try {\n            answer = in.readLine();\n        } catch (IOException ioe) {\n            System.err.println(\"IO error trying to read your answer\");\n        }\n        if (answer == null) {\n            return \"no\";\n        }\n        return answer;\n    }\n}<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>public class TeaWithHook extends CaffeineBeverageWithHook {\n    @Override\n    void brew() {\n        System.out.println(\"Steeping the tea\");\n    }\n\n    @Override\n    void addCondiments() {\n        System.out.println(\"Adding Lemon\");\n    }\n\n    @Override\n    public boolean customerWantsConditions() {\n        String answer = getUserInput();\n\n        if (answer.toLowerCase().startsWith(\"y\")) {\n            return true;\n        } else {\n            return false;\n        }\n    }\n\n    private String getUserInput() {\n        String answer = null;\n\n        System.out.println(\"Would you like lemon with your tea (y\/n)?\");\n\n        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));\n        try {\n            answer = in.readLine();\n        } catch (IOException ioe) {\n            System.err.println(\"IO error trying to read your answer\");\n        }\n        if (answer == null) {\n            return \"no\";\n        }\n        return answer;\n    }\n}<\/code><\/pre>\n\n\n\n<p>\u8fd9\u91cc\u4f7f\u7528\u4e86\u4e00\u4e2a\u8bbe\u8ba1\u539f\u5219\uff0c\u5373\u597d\u83b1\u575e\u539f\u5219\uff1a\u6211\u4eec\u5141\u8bb8\u4f4e\u5c42\u7ec4\u4ef6\u6302\u94a9\u9ad8\u5c42\u7ec4\u4ef6\uff0c\u4f46\u662f\u4e0d\u80fd\u8c03\u7528\u9ad8\u5c42\u7ec4\u4ef6\uff0c\u4f46\u662f\u9ad8\u5c42\u7ec4\u4ef6\u80fd\u8c03\u7528\u4f4e\u5c42\u7ec4\u4ef6\uff0c\u80fd\u51b3\u5b9a\u4ec0\u4e48\u65f6\u5019\u548c\u600e\u6837\u4f7f\u7528\u8fd9\u4e9b\u4f4e\u5c42\u7ec4\u4ef6\u3002\u8fd9\u4e2a\u539f\u5219\u4e3b\u8981\u60f3\u65b9\u6cd5\u4f9d\u8d56\u8150\u8d25\uff0c\u5373\u9ad8\u5c42\u7ec4\u4ef6\u548c\u4f4e\u5c42\u7ec4\u4ef6\u4e4b\u95f4\u590d\u6742\u7684\u4e92\u76f8\u4f9d\u8d56\u5173\u7cfb\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6a21\u7248\u65b9\u6cd5\u6a21\u5f0f\u5728\u4e00\u4e2a\u65b9\u6cd5\u4e2d\u5b9a\u4e49\u4e00\u4e2a\u7b97\u6cd5\u7684\u9aa8\u67b6\uff0c\u800c\u5c06\u4e00\u4e9b\u6b65\u9aa4\u5ef6\u8fdf\u5230\u5b50\u7c7b\u4e2d\u3002\u6a21\u7248\u65b9\u6cd5\u4f7f\u5f97\u5b50\u7c7b\u53ef\u4ee5\u5728\u4e0d\u6539\u53d8\u7b97\u6cd5\u7ed3\u6784\u7684\u60c5 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[25,80],"tags":[],"class_list":["post-1070","post","type-post","status-publish","format-standard","hentry","category-code","category-design-pattern"],"_links":{"self":[{"href":"http:\/\/www.spiceandwolf.com.cn\/index.php\/wp-json\/wp\/v2\/posts\/1070","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.spiceandwolf.com.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.spiceandwolf.com.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.spiceandwolf.com.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.spiceandwolf.com.cn\/index.php\/wp-json\/wp\/v2\/comments?post=1070"}],"version-history":[{"count":3,"href":"http:\/\/www.spiceandwolf.com.cn\/index.php\/wp-json\/wp\/v2\/posts\/1070\/revisions"}],"predecessor-version":[{"id":1766,"href":"http:\/\/www.spiceandwolf.com.cn\/index.php\/wp-json\/wp\/v2\/posts\/1070\/revisions\/1766"}],"wp:attachment":[{"href":"http:\/\/www.spiceandwolf.com.cn\/index.php\/wp-json\/wp\/v2\/media?parent=1070"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.spiceandwolf.com.cn\/index.php\/wp-json\/wp\/v2\/categories?post=1070"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.spiceandwolf.com.cn\/index.php\/wp-json\/wp\/v2\/tags?post=1070"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}