{"id":10006910,"date":"2022-11-24T17:14:31","date_gmt":"2022-11-24T09:14:31","guid":{"rendered":"https:\/\/ityet.com\/?p=10006910"},"modified":"2022-11-24T17:14:31","modified_gmt":"2022-11-24T09:14:31","slug":"%e5%b7%a5%e4%bd%9c%e4%b8%ad%e5%b8%b8%e7%94%a8%e7%9a%84%e8%ae%be%e8%ae%a1%e6%a8%a1%e5%bc%8f-%e9%80%82%e9%85%8d%e5%99%a8%e6%a8%a1%e5%bc%8f","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10006910","title":{"rendered":"\u5de5\u4f5c\u4e2d\u5e38\u7528\u7684\u8bbe\u8ba1\u6a21\u5f0f&#8211;\u9002\u914d\u5668\u6a21\u5f0f"},"content":{"rendered":"<blockquote><p>\u4e00\u822c\u505a\u4e1a\u52a1\u5f00\u53d1\uff0c\u4e0d\u592a\u5bb9\u6613\u6709\u5927\u91cf\u4f7f\u7528\u8bbe\u8ba1\u6a21\u5f0f\u7684\u573a\u666f\u3002\u8fd9\u91cc\u603b\u7ed3\u4e00\u4e0b\u5728\u4e1a\u52a1\u5f00\u53d1\u4e2d\u4f7f\u7528\u8f83\u4e3a\u9891\u7e41\u7684\u8bbe\u8ba1\u6a21\u5f0f\u3002\u5f53\u7136\u8bed\u8a00\u4e3aJava\uff0c\u57fa\u4e8eSpring\u6846\u67b6\u3002<\/p><\/blockquote>\n<h3>1 \u9002\u914d\u5668\u6a21\u5f0f(Adapter Pattern)<\/h3>\n<p>\u5df2\u5b58\u5728\u7684\u63a5\u53e3\u3001\u670d\u52a1\uff0c\u8ddf\u6211\u4eec\u6240\u9700\u3001\u76ee\u7684\u63a5\u53e3\u4e0d\u517c\u5bb9\u65f6\uff0c\u6211\u4eec\u9700\u8981\u901a\u8fc7\u4e00\u5b9a\u7684\u65b9\u6cd5\u5c06\u4e8c\u8005\u8fdb\u884c\u517c\u5bb9\u9002\u914d\u3002\u4e00\u4e2a\u5e38\u89c1\u7684\u4f8b\u5b50\uff0c\u5bb6\u7528\u7535\u6e90(\u56fd\u6807)220V\uff0c\u800c\u624b\u673a\u6807\u51c6\u8f93\u5165\u4e00\u822c\u4e3a5V\uff0c\u6b64\u65f6\u6211\u4eec\u4fbf\u9700\u8981\u4e00\u4e2a\u9002\u914d\u5668\u6765\u5c06220V\u8f6c\u6362\u4e3a5V\u4f7f\u7528\u3002<\/p>\n<p>\u9002\u914d\u5668\u6a21\u5f0f\u4e00\u822c\u67093\u4e2a\u89d2\u8272\uff1a<\/p>\n<ul>\n<li>Target: \u76ee\u6807\u63a5\u53e3<\/li>\n<li>Adaptee: \u9700\u8981\u8fdb\u884c\u9002\u914d\u7684\u7c7b(\u53d7\u6539\u9020\u8005)<\/li>\n<li>Adapter: \u9002\u914d\u5668(\u5c06Adaptee\u8f6c\u4e3aTarget)<\/li>\n<\/ul>\n<p>\u8fd9\u4e2a\u51fa\u73b0\u7684\u573a\u666f\u5176\u5b9e\u633a\u591a\uff0c\u4f46\u5b9e\u9645\u5b8c\u5168\u6309\u7167\u9002\u914d\u5668\u6a21\u5f0f\u7f16\u5199\u4ee3\u7801\u7684\u573a\u666f\u53ef\u80fd\u5e76\u4e0d\u591a\u3002\u7b80\u5355\u4e1a\u52a1\u573a\u666f\uff0c\u76f4\u63a5\u5c31\u5c06\u9002\u914d\u3001\u517c\u5bb9\u4ee3\u7801\u6df7\u6742\u5728\u4e1a\u52a1\u4ee3\u7801\u4e2d\u4e86\u3002\u5e76\u6ca1\u6709\u5c06\u5176\u6458\u51fa\u6765\u5904\u7406\u3002\u5927\u90e8\u5206\u4e1a\u52a1\u4ee3\u7801\uff0c\u53ef\u80fd\u540e\u7eed\u5e76\u4e0d\u4f1a\u518d\u505a\u6269\u5c55\u4e4b\u7c7b\uff0c\u8fc7\u5ea6\u8bbe\u8ba1\u53cd\u800c\u4f1a\u964d\u4f4e\u53ef\u8bfb\u6027\u5e76\u589e\u52a0\u4ee3\u7801\u7684\u590d\u6742\u6027\u3002<\/p>\n<p>\u9002\u914d\u5668\u6a21\u5f0f\u4e00\u822c\u5206\u4e3a<code>\u7c7b\u9002\u914d\u5668<\/code>\u548c<code>\u5bf9\u8c61\u9002\u914d\u5668<\/code>\u3002<br \/>\u7c7b\u9002\u914d\u5668\u7684\u8bdd\uff0c\u4f7f\u7528\u7ee7\u627f\u65b9\u5f0f\u5b9e\u73b0\uff1a<code>class Adapter extends Adaptee implements Target<\/code>\uff1b\u800c\u5bf9\u8c61\u9002\u914d\u5668\u7684\u8bdd\uff0c\u5219\u4f7f\u7528\u7ec4\u5408\u65b9\u5f0f\u5b9e\u73b0\u3002\u8fd9\u79cd\u60c5\u51b5\u66f4\u7075\u6d3b\u4e00\u4e9b\u3002\u6bd5\u7adf\u5927\u5bb6\u90fd\u63a8\u8350\u591a\u7528\u7ec4\u5408\u5c11\u7528\u7ee7\u627f\u3002<\/p>\n<p>\u5728\u5b66\u751f\u53d1\u751f\u7ea6\u8bfe\u5b8c\u8bfe\u7b49\u4e8b\u4ef6\u65f6\uff0c\u6211\u4eec\u9700\u8981\u5c06\u90e8\u5206\u6570\u636e\u540c\u6b65\u5230\u5916\u90e8CRM\u7cfb\u7edf\u4e2d\u3002\u8bfe\u7a0b\u7684\u8bdd\uff0c\u6309\u73ed\u7ea7\u7c7b\u578b\u5206\u4e3a\uff1a1v1\uff0c\u5c0f\u73ed\u8bfe\u3001\u5927\u73ed\u8bfe\u3002\u4e0d\u540c\u7684\u73ed\u7ea7\u7c7b\u578b\u8bfe\u7a0b\u6570\u636e\u6709\u6240\u4e0d\u540c\u3002\u4e8b\u4ef6\u4e0a\u62a5\u65f6\uff0c\u5e76\u4e0d\u662f\u5168\u91cf\u6570\u636e\uff0c\u6709\u4e9b\u6570\u636e\u9700\u8981\u6d88\u8d39\u8005\u6309\u9700\u67e5\u8be2\u3002\u5982\u8bfe\u7a0b\u8bfe\u7a0b\u7f16\u53f7\u3001\u540d\u79f0\u3001\u9884\u7ea6\u4e0a\u8bfe\u65f6\u95f4\u7b49\u3002<\/p>\n<p>\u4e0d\u540c\u73ed\u7ea7\u7c7b\u578b\u7684\u8bfe\u7a0b\u7531\u4e09\u4e2a\u4e0d\u540c\u7684FeignClient(Adaptee)\u63d0\u4f9b\u670d\u52a1\uff0c\u800c\u6211\u4eec\u60f3\u8981\u7684\u5c31\u662f\u67e5\u8be2\u8bfe\u7a0b\u76f8\u5173\u4fe1\u606f(Target)\u3002<\/p>\n<p>\u4e3a\u4e86\u6a21\u62df\u670d\u52a1\u63d0\u4f9b\u8005\uff0c\u6211\u4eecMock\u5982\u4e0b\u670d\u52a1\u3002<\/p>\n<pre><code class=\"Java\">@Data\n@Builder\npublic class OneClass {\n    \/\/ \u8bfe\u7a0b\u7f16\u53f7\n    private String lessonNo;\n    \/\/ \u8bfe\u7a0b\u540d\u79f0\n    private String lessonName;\n\n    \/\/ \u5176\u4ed6\u4fe1\u606f\n    private String one;\n}\n\n@Data\n@Builder\npublic class SmallClass {\n    \/\/ \u8bfe\u7a0b\u7f16\u53f7\n    private String lessonNo;\n    \/\/ \u8bfe\u7a0b\u540d\u79f0\n    private String lessonName;\n\n    \/\/ \u5176\u4ed6\u4fe1\u606f\n    private String small;\n}\n\n@Data\n@Builder\npublic class BigClass {\n    \/\/ \u8bfe\u7a0b\u7f16\u53f7\n    private String lessonNo;\n    \/\/ \u8bfe\u7a0b\u540d\u79f0\n    private String lessonName;\n\n    \/\/ \u5176\u4ed6\u4fe1\u606f\n    private String big;\n}\n\npublic interface RemoteClassClient {\n\n    default OneClass getOne() {\n        return OneClass.builder().lessonNo(&quot;one&quot;).lessonName(&quot;1V1&quot;).build();\n    }\n\n    default SmallClass getSmall() {\n        return SmallClass.builder().lessonNo(&quot;small&quot;).lessonName(&quot;\u5c0f\u73ed\u8bfe&quot;).build();\n    }\n\n    default BigClass getBig() {\n        return BigClass.builder().lessonNo(&quot;big&quot;).lessonName(&quot;\u5927\u73ed\u8bfe&quot;).build();\n    }\n}\n\npublic class RemoteClassClientImpl implements RemoteClassClient {\n}<\/code><\/pre>\n<p>\u8be5\u670d\u52a1\u7edf\u4e00\u7531<code>RemoteClassClient<\/code>\u5bf9\u5916\u63d0\u4f9b\u5404\u4e2a\u73ed\u7ea7\u7c7b\u578b\u7684\u67e5\u8be2\u670d\u52a1\u3002<\/p>\n<blockquote><p>ClassService (Target\u76ee\u6807\u63a5\u53e3\u3001\u53ca\u76ee\u6807\u5bf9\u8c61)<\/p><\/blockquote>\n<pre><code class=\"java\">\/**\n * \u8bfe\u7a0b\u4fe1\u606f\n *\/\n@Data\n@Builder\npublic class ClassInfoBO {\n    \/\/ \u8bfe\u7a0b\u7c7b\u578b 1:1v1 2:small 3:big\n    private String type;\n\n    \/\/ \u73ed\u7ea7ID\n    private String classId;\n    \/\/ \u8bfe\u7a0b\u7f16\u53f7\n    private String lessonNo;\n    \/\/ \u8bfe\u7a0b\u540d\u79f0\n    private String lessonName;\n}\n\n\/**\n * \u76ee\u6807\u63a5\u53e3\n *\/\npublic interface ClassService {\n\n    boolean match(String classType);\n\n    ClassInfoBO getClassInfo(String classId);\n}<\/code><\/pre>\n<p>\u4e0b\u9762\u6211\u4eec\u5c31\u9700\u8981\u51e0\u4e2a\u9002\u914d\u5668\u6765\u5b8c\u6210\u9002\u914d\u3002<\/p>\n<h4>1.1 \u5bf9\u8c61\u9002\u914d\u5668<\/h4>\n<blockquote><p>OneClassAdapter<\/p><\/blockquote>\n<pre><code class=\"java\">\/**\n * 1v1\u9002\u914d\u5668\n *\/\n@Component\n@RequiredArgsConstructor\npublic class OneClassAdapter implements ClassService {\n    private static final String TYPE = &quot;1&quot;;\n\n    private final RemoteClassClient classClient;\n\n    @Override\n    public boolean match(String classType) {\n        return TYPE.equals(classType);\n    }\n\n    @Override\n    public ClassInfoBO getClassInfo(String classId) {\n        final OneClass one = classClient.getOne();\n        return ClassInfoBO.builder()\n                .type(&quot;1&quot;)\n                .classId(classId)\n                .lessonNo(one.getLessonNo()).lessonName(one.getLessonName())\n                .build();\n    }\n}<\/code><\/pre>\n<blockquote><p>SmallClassAdapter<\/p><\/blockquote>\n<pre><code>\/**\n * \u5c0f\u73ed\u8bfe\u9002\u914d\u5668\n *\/\n@Component\n@RequiredArgsConstructor\npublic class SmallClassAdapter implements ClassService {\n    private static final String TYPE = &quot;2&quot;;\n\n    private final RemoteClassClient classClient;\n\n    @Override\n    public boolean match(String classType) {\n        return TYPE.equals(classType);\n    }\n\n    @Override\n    public ClassInfoBO getClassInfo(String classId) {\n        final SmallClass small = classClient.getSmall();\n        return ClassInfoBO.builder()\n                .type(&quot;2&quot;)\n                .classId(classId)\n                .lessonNo(small.getLessonNo()).lessonName(small.getLessonName())\n                .build();\n    }\n}<\/code><\/pre>\n<blockquote><p>BigClassAdapter<\/p><\/blockquote>\n<pre><code class=\"java\">\/**\n * \u5927\u73ed\u8bfe\u9002\u914d\u5668\n *\/\n@Component\n@RequiredArgsConstructor\npublic class BigClassAdapter implements ClassService {\n    private static final String TYPE = &quot;3&quot;;\n\n    private final RemoteClassClient classClient;\n\n    @Override\n    public boolean match(String classType) {\n        return TYPE.equals(classType);\n    }\n\n    @Override\n    public ClassInfoBO getClassInfo(String classId) {\n        final BigClass big = classClient.getBig();\n        return ClassInfoBO.builder()\n                .type(&quot;3&quot;)\n                .classId(classId)\n                .lessonNo(big.getLessonNo()).lessonName(big.getLessonName())\n                .build();\n    }\n}<\/code><\/pre>\n<p>\u81f3\u6b64\uff0c\u9002\u914d\u5668\u5b8c\u6210\u3002\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u573a\u666f\u9009\u62e9\u4e0d\u540c\u7684\u9002\u914d\u5668\uff0c\u53bb\u9002\u914d\u5f53\u524d\u7684\u573a\u666f\u3002\u518d\u6765\u4e2a\u9002\u914d\u5668\u5de5\u5382\u7c7b\u3002<\/p>\n<blockquote><p>ClassAdapterFactory<\/p><\/blockquote>\n<pre><code class=\"java\">\/**\n * \u8bfe\u7a0b\u4fe1\u606f\u9002\u914d\u5668\u5de5\u5382\n *\/\n@Service\n@RequiredArgsConstructor\npublic class ClassAdapterFactory {\n    private final List&lt;ClassService&gt; classServiceList;\n\n    ClassService getAdapter(String classType) {\n        return classServiceList.stream()\n                .filter(cs -&gt; cs.match(classType)).findFirst()\n                .orElse(null);\n    }\n}<\/code><\/pre>\n<h4>1.2 \u7c7b\u9002\u914d\u5668<\/h4>\n<p>\u4ec5\u4ee5\u5176\u4e00\u4e3e\u4f8b\u3002\u8fd9\u79cd\u9002\u914d\u5668\u4e0d\u5982\u5bf9\u8c61\u9002\u914d\u5668\u7075\u6d3b\u3002<\/p>\n<pre><code class=\"java\">\/**\n * \u5c0f\u73ed\u8bfe\u9002\u914d\u5668(\u7c7b\u9002\u914d\u5668)\n *\/\n@Component\npublic class SmallClassAdapter2 extends RemoteClassClientImpl implements ClassService {\n    private static final String TYPE = &quot;2&quot;;\n\n    @Override\n    public boolean match(String classType) {\n        return TYPE.equals(classType);\n    }\n\n    @Override\n    public ClassInfoBO getClassInfo(String classId) {\n        final SmallClass small = super.getSmall();\n        return ClassInfoBO.builder()\n                .type(&quot;2&quot;)\n                .classId(classId)\n                .lessonNo(small.getLessonNo()).lessonName(small.getLessonName())\n                .build();\n    }\n}<\/code><\/pre>\n<p>\u53ef\u4ee5\u770b\u5230\uff0c\u6211\u4eec\u901a\u8fc7<code>\u7ee7\u627f<\/code>\u7684\u65b9\u5f0f\uff0c\u4f7f<code>SmallClassAdapter2<\/code>\u5177\u5907\u4e86<code>RemoteClassClientImpl<\/code>\u67e5\u8be2\u8bfe\u7a0b\u4fe1\u606f\u7684\u80fd\u529b\u3002\u8ddf<code>SmallClassAdapter<\/code>\u4e5f\u6ca1\u6709\u5565\u592a\u5927\u533a\u522b\u3002<\/p>\n<h4>1.3 \u5355\u6d4b<\/h4>\n<pre><code class=\"java\">@SpringBootTest\nclass ClassServiceTest {\n\n    @Autowired\n    private ClassAdapterFactory adapterFactory;\n\n    @Test\n    void testOne() {\n        String classType = &quot;1&quot;;\n        String classId = &quot;11111111&quot;;\n        Optional.ofNullable(adapterFactory.getAdapter(classType)).ifPresent(ad -&gt; {\n            final ClassInfoBO classInfo = ad.getClassInfo(classId);\n            assertEquals(&quot;one&quot;, classInfo.getLessonNo());\n        });\n    }\n\n    @Test\n    void testSmall() {\n        String classType = &quot;2&quot;;\n        String classId = &quot;22222222&quot;;\n        Optional.ofNullable(adapterFactory.getAdapter(classType)).ifPresent(ad -&gt; {\n            final ClassInfoBO classInfo = ad.getClassInfo(classId);\n            assertEquals(&quot;small&quot;, classInfo.getLessonNo());\n        });\n    }\n\n    @Test\n    void testBig() {\n        String classType = &quot;3&quot;;\n        String classId = &quot;33333333&quot;;\n        Optional.ofNullable(adapterFactory.getAdapter(classType)).ifPresent(ad -&gt; {\n            final ClassInfoBO classInfo = ad.getClassInfo(classId);\n            assertEquals(&quot;big&quot;, classInfo.getLessonNo());\n        });\n    }\n}<\/code><\/pre>\n<h3>2 \u601d\u8003<\/h3>\n<p>\u9002\u914d\u5668\u6a21\u5f0f\u80fd\u5e26\u6765\u4ec0\u4e48\uff1f<\/p>\n<ol>\n<li>\u611f\u89c9\u6700\u4e3b\u8981\u7684\u8fd8\u662f\u5e26\u4e86\u4e00\u79cd\u89e3\u51b3\u65b9\u6848(\ud83d\ude05\u5f53\u7136\u8bbe\u8ba1\u6a21\u5f0f\u672c\u6765\u5c31\u662f\u5982\u6b64)\u3002\u5176\u6b21\u662f\u5bf9\u67d0\u4e9b\u573a\u666f\u63d0\u4f9b\u4e86\u4e00\u79cd\u89c4\u8303\uff0c\u52a0\u5165\u6ca1\u6709\u8fd9\u4e2a\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u6211\u4eec\u4e5f\u80fd\u6709\u89e3\u51b3\u65b9\u6848\uff0c\u4f46\u5177\u4f53\u5b9e\u73b0\u53ef\u80fd\u5343\u5947\u767e\u602a(\ud83d\ude05\u5f53\u7136\u8bbe\u8ba1\u6a21\u5f0f\u672c\u6765\u5c31\u662f\u4ece\u5343\u5947\u767e\u602a\u4e2d\u63d0\u70bc\u51fa\u6765\u7684)\u3002<\/li>\n<li>\u8bbe\u8ba1\u6a21\u5f0f\u4e0d\u662f\u94f6\u5f39\u3002\u907f\u514d\u6ee5\u7528\u3002<\/li>\n<\/ol>\n<p>\u8ddf\u7b56\u7565\u6a21\u5f0f\u6709\u5565\u533a\u522b\uff1f<\/p>\n<ol>\n<li>\u5355\u4ece\u5b9e\u73b0\u65b9\u5f0f(\u5957\u8def)\u6765\u8bf4\u3002\u4e0d\u80fd\u8bf4\u6beb\u65e0\u533a\u522b\uff0c\u7b80\u76f4\u5c31\u662f\u4e00\u6a21\u4e00\u6837\u3002<\/li>\n<li>\u7ec6\u60f3\u4e00\u4e0b\uff0c<code>Adaptee<\/code>\u5728\u7b56\u7565\u6a21\u5f0f\u4e2d\uff0c\u5e76\u4e0d\u662f\u5fc5\u7136\u5b58\u5728\u7684\u3002\u5b83\u7684\u76ee\u7684\u662f\u4e0d\u540c\u7b56\u7565\u7684\u5177\u4f53\u5b9e\u73b0\u548c\u8c03\u7528\u5206\u5f00\u3002\u800c\u9002\u914d\u5668\u6a21\u5f0f\u7684\u91cd\u70b9\u5728\u4e8e<code>Adaptee -&gt; Target<\/code>\u7684\u9002\u914d\u3002<\/li>\n<\/ol>\n<hr>\n<p>\u5c01\u9762\u56fe\u6765\u6e90: <a href=\"https:\/\/link.segmentfault.com\/?enc=JfMG8dRU3sNY2WjvxDzuTg%3D%3D.ieDPzOFXepjJT7fScVbNzgqdAIKmnCdo3EVl2SUrAhqAj89A55zXkzWKkn3tu%2Fs230jvuVYNy4kkvZxVRAJGGw%3D%3D\" rel=\"nofollow\">https:\/\/refactoring.guru\/desi&#8230;<\/a><\/p>\n<p><a href=\"https:\/\/segmentfault.com\/a\/1190000042888202\">https:\/\/segmentfault.com\/a\/1190000042888202<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u822c\u505a\u4e1a\u52a1\u5f00\u53d1\uff0c\u4e0d\u592a\u5bb9\u6613\u6709\u5927\u91cf\u4f7f\u7528\u8bbe\u8ba1\u6a21\u5f0f\u7684\u573a\u666f\u3002\u8fd9\u91cc\u603b\u7ed3\u4e00\u4e0b\u5728\u4e1a\u52a1\u5f00\u53d1\u4e2d\u4f7f\u7528\u8f83\u4e3a\u9891\u7e41\u7684\u8bbe\u8ba1\u6a21\u5f0f\u3002\u5f53\u7136\u8bed\u8a00\u4e3aJ [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-10006910","post","type-post","status-publish","format-standard","hentry","category-share"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10006910","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10006910"}],"version-history":[{"count":0,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10006910\/revisions"}],"wp:attachment":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10006910"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10006910"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10006910"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}