{"id":10021121,"date":"2025-12-16T21:34:16","date_gmt":"2025-12-16T13:34:16","guid":{"rendered":"https:\/\/itmax.cn\/?p=10021121"},"modified":"2025-12-16T21:34:16","modified_gmt":"2025-12-16T13:34:16","slug":"junit-5-%e4%b8%ad%e7%9a%84-classtemplate-%e5%ae%9e%e6%88%98%e6%8c%87%e5%8d%97","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10021121","title":{"rendered":"JUnit 5 \u4e2d\u7684 @ClassTemplate \u5b9e\u6218\u6307\u5357"},"content":{"rendered":"

\u5f53\u4f60\u5728\u672c\u5730\u3001\u6d4b\u8bd5\u73af\u5883\u548c CI \u4e2d\u8dd1\u540c\u4e00\u7ec4\u6d4b\u8bd5\u65f6\uff0c\u662f\u5426\u9047\u5230\u8fc7\u8fd9\u6837\u7684\u56f0\u60d1\uff1a\u540c\u4e00\u6bb5\u4e1a\u52a1\u903b\u8f91\u5728\u4e0d\u540c\u914d\u7f6e\u3001\u4e0d\u540c Locale \u4e0b\u7684\u8868\u73b0\u4e0d\u5c3d\u76f8\u540c\uff0c\u4f46\u4f60\u53c8\u4e0d\u60f3\u4e3a\u6bcf\u79cd\u573a\u666f\u590d\u5236\u4e00\u5806\u51e0\u4e4e\u4e00\u6837\u7684\u6d4b\u8bd5\u7c7b\uff1f\u5982\u679c\u628a\u6240\u6709\u5206\u652f\u903b\u8f91\u90fd\u585e\u8fdb\u4e00\u4e2a\u6d4b\u8bd5\u65b9\u6cd5\u91cc\uff0c\u53c8\u4f1a\u8ba9\u6d4b\u8bd5\u53d8\u5f97\u81c3\u80bf\u96be\u4ee5\u7ef4\u62a4\u3002\u6709\u6ca1\u6709\u4e00\u79cd\u65b9\u5f0f\uff0c\u53ef\u4ee5\u8ba9\u6d4b\u8bd5\u4ee3\u7801\u4fdd\u6301\u7b80\u6d01\uff0c\u5374\u80fd\u4f18\u96c5\u5730\u5728\u591a\u79cd\u201c\u73af\u5883\u5207\u9762\u201d\u4e0b\u91cd\u590d\u6267\u884c\u6574\u5957\u6d4b\u8bd5\uff1f\u8fd9\u6b63\u662f JUnit 5 \u4e2d @ClassTemplate<\/code> \u60f3\u8981\u89e3\u51b3\u7684\u95ee\u9898\u3002\u672c\u6587\u5c31\u4ece\u8fd9\u4e2a\u73b0\u5b9e\u573a\u666f\u51fa\u53d1\uff0c\u5e26\u4f60\u6df1\u5165\u7406\u89e3 Class Template \u7684\u6267\u884c\u673a\u5236\u3001\u6269\u5c55\u70b9\u8bbe\u8ba1\u4ee5\u53ca\u4e00\u4e2a\u5b9e\u7528\u7684\u591a Locale \u793a\u4f8b\u3002<\/p>\n

1. \u5f15\u8a00<\/h2>\n

\u6709\u4e9b\u6d4b\u8bd5\u9700\u8981\u5728\u4e0d\u540c\u7684\u73af\u5883\u4e2d\u8fd0\u884c\u3002@ClassTemplate<\/code> \u6ce8\u89e3\u53ef\u4ee5\u5e2e\u6211\u4eec\u505a\u5230\u8fd9\u4e00\u70b9\uff1a\u5b83\u4f1a\u8ba9\u6574\u4e2a\u6d4b\u8bd5\u7c7b\u5728\u591a\u79cd\u4e0d\u540c\u914d\u7f6e\u4e0b\u88ab\u91cd\u590d\u6267\u884c\u3002<\/p>\n

\u5728\u8fd9\u7bc7\u6559\u7a0b\u4e2d\uff0c\u6211\u4eec\u4f1a\u5148\u8ba8\u8bba\u4e3a\u4ec0\u4e48\u4f1a\u6709\u201c\u7c7b\u6a21\u677f\uff08Class Template\uff09\u201d\u8fd9\u79cd\u673a\u5236\uff0c\u4ee5\u53ca JUnit \u662f\u5982\u4f55\u6267\u884c\u5b83\u4eec\u7684\uff1b\u63a5\u7740\u4f1a\u770b\u770b\u5b83\u5728\u6574\u4f53\u6267\u884c\u6a21\u578b\u4e2d\u7684\u4f4d\u7f6e\uff1b\u6700\u540e\uff0c\u6211\u4eec\u4f1a\u62c6\u89e3\u7c7b\u6a21\u677f\u7684\u7ed3\u6784\u3001\u80cc\u540e\u7684\u63d0\u4f9b\u8005\uff08provider\uff09\uff0c\u5e76\u901a\u8fc7\u4e00\u4e2a\u793a\u4f8b\uff0c\u5728\u4e0d\u590d\u5236\u4efb\u4f55\u6d4b\u8bd5\u4ee3\u7801\u7684\u524d\u63d0\u4e0b\uff0c\u8ba9\u540c\u4e00\u4e2a\u6d4b\u8bd5\u7c7b\u5728\u591a\u4e2a Locale \u73af\u5883\u4e0b\u8fd0\u884c\u3002<\/p>\n

2. \u4ec0\u4e48\u662f @ClassTemplate<\/code><\/h2>\n

\u7b80\u5355\u56de\u987e\u4e00\u4e0b\uff0c@ClassTemplate<\/code> \u4f1a\u628a\u4e00\u4e2a\u6d4b\u8bd5\u7c7b\u53d8\u6210\u201c\u6a21\u677f\u7c7b\u201d\uff0c\u8ba9\u5b83\u6309\u7167\u4e0d\u540c\u7684\u8c03\u7528\u4e0a\u4e0b\u6587\uff08invocation context\uff09\u591a\u6b21\u6267\u884c\u3002\u63d0\u4f9b\u8005\u8d1f\u8d23\u63d0\u4f9b\u8fd9\u4e9b\u4e0a\u4e0b\u6587\uff0c\u6bcf\u4e00\u4e2a\u4e0a\u4e0b\u6587\u90fd\u4f1a\u89e6\u53d1\u4e00\u6b21\u72ec\u7acb\u7684\u6267\u884c\uff0c\u62e5\u6709\u5404\u81ea\u7684\u751f\u547d\u5468\u671f\u548c\u6269\u5c55\u3002<\/p>\n

\u5728\u5b9e\u8df5\u4e2d\uff0c\u8fd9\u8ba9\u6211\u4eec\u53ef\u4ee5\u5728\u4e0d\u540c\u73af\u5883\u6216\u914d\u7f6e\u4e0b\u591a\u6b21\u8fd0\u884c\u540c\u4e00\u4e2a\u6d4b\u8bd5\u7c7b\uff0c\u540c\u65f6\u4fdd\u6301\u6d4b\u8bd5\u4ee3\u7801\u672c\u8eab\u7684\u7b80\u5355\u6027<\/strong>\u3002\u6211\u4eec\u53ef\u4ee5\u6539\u53d8\u8fd0\u884c\u65f6\u7684\u73af\u5883\u914d\u7f6e\uff0c\u800c\u4e0d\u7528\u590d\u5236\u6d4b\u8bd5\u7c7b\uff0c\u6216\u8005\u5728\u5355\u4e2a\u6d4b\u8bd5\u65b9\u6cd5\u91cc\u52a0\u5165\u590d\u6742\u7684\u5206\u652f\u903b\u8f91\u3002<\/p>\n

2.1. Class Template \u5982\u4f55\u6267\u884c<\/h3>\n

\u4e00\u4e2a\u7c7b\u6a21\u677f\u7531\u4e24\u90e8\u5206\u7ec4\u6210\uff1a\u6a21\u677f\u7c7b\u672c\u8eab\uff0c\u4ee5\u53ca\u4e3a\u5176\u63d0\u4f9b\u8c03\u7528\u4e0a\u4e0b\u6587\u7684\u63d0\u4f9b\u8005<\/strong>\u3002\u6a21\u677f\u7c7b\u5728\u5916\u89c2\u4e0a\u5c31\u50cf\u4e00\u4e2a\u666e\u901a\u7684 JUnit \u6d4b\u8bd5\u7c7b\uff0c\u4f46 @ClassTemplate<\/code> \u6ce8\u89e3\u4f1a\u544a\u8bc9 JUnit \u4e0d\u8981\u76f4\u63a5\u8fd0\u884c\u5b83\uff0c\u800c\u662f\u7b49\u5f85\u63d0\u4f9b\u8005\u6765\u5b9a\u4e49\u8be5\u7c7b\u7684\u5177\u4f53\u6267\u884c\u65b9\u5f0f\u3002<\/p>\n

\u4e00\u65e6 JUnit \u8bc6\u522b\u51fa\u67d0\u4e2a\u7c7b\u662f\u7c7b\u6a21\u677f\uff0c\u63d0\u4f9b\u8005\u5c31\u4f1a\u8fd4\u56de\u4e00\u4e2a\u6216\u591a\u4e2a\u4e0a\u4e0b\u6587\uff0c\u6bcf\u4e2a\u4e0a\u4e0b\u6587\u90fd\u5b9a\u4e49\u4e86\u4e00\u6b21\u5b8c\u6574\u7684\u6267\u884c\u3002\u5bf9\u4e8e\u6bcf\u4e2a\u4e0a\u4e0b\u6587\uff0cJUnit \u90fd\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u6d4b\u8bd5\u5b9e\u4f8b\uff0c\u5e94\u7528\u5bf9\u5e94\u7684\u6269\u5c55\uff0c\u5e76\u6267\u884c\u751f\u547d\u5468\u671f\u65b9\u6cd5\u548c\u6d4b\u8bd5\u65b9\u6cd5<\/strong>\u3002\u8fd9\u6837\uff0c\u6d4b\u8bd5\u7c7b\u53ef\u4ee5\u4e13\u6ce8\u4e8e\u4e1a\u52a1\u903b\u8f91\u672c\u8eab\uff0c\u800c\u7531\u63d0\u4f9b\u8005\u6765\u5851\u9020\u8fd0\u884c\u65f6\u73af\u5883\u3002<\/p>\n

2.2. Class Template \u4e0e Method Template \u5bf9\u6bd4<\/h3>\n

\u5728\u7ee7\u7eed\u4e4b\u524d\uff0c\u503c\u5f97\u5148\u5bf9\u6bd4\u4e00\u4e0b\u7c7b\u6a21\u677f\u548c\u65b9\u6cd5\u6a21\u677f\uff08method template\uff09\u4e4b\u95f4\u7684\u533a\u522b\u3002\u4e24\u8005\u90fd\u652f\u6301\u91cd\u590d\u6267\u884c\uff0c\u4f46\u5173\u6ce8\u7684\u5c42\u7ea7\u4e0d\u540c\u3002\u65b9\u6cd5\u6a21\u677f\u4f1a\u5728\u4e0d\u540c\u8f93\u5165\u4e0b\u91cd\u590d\u6267\u884c\u540c\u4e00\u4e2a\u6d4b\u8bd5\u65b9\u6cd5<\/strong>\uff1b\u800c\u7c7b\u6a21\u677f\u5219\u4f1a\u91cd\u590d\u6267\u884c\u6574\u4e2a\u6d4b\u8bd5\u7c7b<\/strong>\uff0c\u5305\u62ec\u5b83\u7684\u751f\u547d\u5468\u671f\u56de\u8c03\u3001\u6269\u5c55\u4ee5\u53ca\u914d\u7f6e\u3002<\/p>\n

\u56e0\u6b64\uff0c\u5f53\u53d8\u5316\u70b9\u4e3b\u8981\u4f53\u73b0\u5728\u6574\u4f53\u73af\u5883\u5c42\u9762\u2014\u2014\u4f8b\u5982 Locale\u3001\u7279\u6027\u5f00\u5173\u6216\u7cfb\u7edf\u7ea7\u914d\u7f6e\u2014\u2014\u800c\u4e0d\u662f\u5355\u4e2a\u65b9\u6cd5\u53c2\u6570\u65f6\uff0c\u7c7b\u6a21\u677f\u4f1a\u66f4\u52a0\u5408\u9002<\/strong>\u3002<\/p>\n

3. \u8c03\u7528\u4e0a\u4e0b\u6587\u63d0\u4f9b\u8005<\/h2>\n

\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u770b\u770b\u201c\u8c03\u7528\u4e0a\u4e0b\u6587\u63d0\u4f9b\u8005\uff08invocation context provider\uff09\u201d\u3002\u8fd9\u4e2a\u6269\u5c55\u8d1f\u8d23\u4e3a\u7c7b\u6a21\u677f\u63d0\u4f9b\u6267\u884c\u4e0a\u4e0b\u6587<\/strong>\u3002\u5b83\u9700\u8981\u5b9e\u73b0 ClassTemplateInvocationContextProvider<\/code> \u63a5\u53e3\uff0c\u8be5\u63a5\u53e3\u5b9a\u4e49\u4e86\u4e24\u4e2a\u6838\u5fc3\u65b9\u6cd5\uff0c\u7528\u6765\u51b3\u5b9a\u63d0\u4f9b\u8005\u5982\u4f55\u53c2\u4e0e\u6d4b\u8bd5\u6267\u884c\u3002<\/p>\n

\u4e0b\u9762\u6211\u4eec\u5206\u522b\u6765\u770b\u3002<\/p>\n

3.1. supportsClassTemplate()<\/code> \u65b9\u6cd5<\/h3>\n

\u5728 JUnit \u4f7f\u7528\u67d0\u4e2a\u63d0\u4f9b\u8005\u4e4b\u524d\uff0c\u5b83\u4f1a\u5148\u68c0\u67e5\u8be5\u63d0\u4f9b\u8005\u662f\u5426\u9002\u7528\u4e8e\u5f53\u524d\u6b63\u5728\u53d1\u73b0\u7684\u6d4b\u8bd5\u7c7b\u3002\u8fd9\u4e2a\u68c0\u67e5\u5c31\u662f\u901a\u8fc7 supportsClassTemplate()<\/code> \u65b9\u6cd5\u5b8c\u6210\u7684\uff1a<\/p>\n

@Override\npublic boolean supportsClassTemplate(ExtensionContext context) {\n    return context.getTestClass()\n        .map(aClass -> aClass.isAnnotationPresent(ClassTemplate.class))\n        .orElse(false);\n}<\/code><\/pre>\n
JUnit \u4f1a\u5bf9\u6bcf\u4e00\u4e2a\u5df2\u6ce8\u518c\u7684\u63d0\u4f9b\u8005\u8c03\u7528\u8fd9\u4e2a\u65b9\u6cd5\u3002\u53ea\u6709\u8fd4\u56de true<\/code> \u7684\u63d0\u4f9b\u8005\u624d\u4f1a\u5bf9\u5f53\u524d\u7c7b\u6a21\u677f\u751f\u6548\u3002\u901a\u8fc7\u8fd9\u79cd\u673a\u5236\uff0cJUnit \u53ef\u4ee5\u907f\u514d\u63d0\u4f9b\u8005\u88ab\u610f\u5916\u6fc0\u6d3b\uff0c\u907f\u514d\u5728\u65e0\u5173\u6d4b\u8bd5\u4e0a\u8fd0\u884c\u6269\u5c55\uff0c\u540c\u65f6\u4e5f\u5141\u8bb8\u591a\u4e2a\u63d0\u4f9b\u8005\u5e76\u5b58\u800c\u4e92\u4e0d\u5e72\u6270<\/strong>\u3002<\/p>\n
3.2. provideClassTemplateInvocationContexts()<\/code> \u65b9\u6cd5<\/h3>\n
\u4e00\u65e6\u67d0\u4e2a\u63d0\u4f9b\u8005\u88ab\u6fc0\u6d3b\uff0cJUnit \u5c31\u4f1a\u8c03\u7528 provideClassTemplateInvocationContexts()<\/code>\uff0c\u4ee5\u83b7\u53d6\u63cf\u8ff0\u6a21\u677f\u6267\u884c\u65b9\u5f0f\u7684\u4e0a\u4e0b\u6587\uff1a<\/p>\n
@Override\npublic Stream<ClassTemplateInvocationContext> provideClassTemplateInvocationContexts(ExtensionContext context) {\n    return Stream.of(invocationContext("A"), invocationContext("B"));\n}<\/code><\/pre>\n
\u6bcf\u4e00\u4e2a\u4e0a\u4e0b\u6587\u90fd\u4ee3\u8868\u4e86\u4e00\u6b21\u5bf9\u6d4b\u8bd5\u7c7b\u7684\u5b8c\u6574\u6267\u884c<\/strong>\u3002\u5355\u4e2a\u63d0\u4f9b\u8005\u53ef\u4ee5\u63d0\u4f9b\u4e00\u4e2a\u6216\u591a\u4e2a\u4e0a\u4e0b\u6587\uff1b\u5982\u679c\u540c\u65f6\u6709\u591a\u4e2a\u63d0\u4f9b\u8005\u5904\u4e8e\u6fc0\u6d3b\u72b6\u6001\uff0cJUnit \u4f1a\u628a\u5b83\u4eec\u63d0\u4f9b\u7684\u6d41\u62fc\u63a5\u8d77\u6765\u3002\u6bcf\u4e2a\u4e0a\u4e0b\u6587\u90fd\u53ef\u4ee5\u6dfb\u52a0\u81ea\u5df1\u7684\u6269\u5c55\u6216\u914d\u7f6e\uff0c\u4ece\u800c\u8ba9\u63d0\u4f9b\u8005\u53ef\u4ee5\u5bf9\u8be5\u6b21\u6267\u884c\u7684\u73af\u5883\u8fdb\u884c\u7cbe\u7ec6\u63a7\u5236\u3002<\/p>\n
\u4ece\u8fd9\u91cc\u5f00\u59cb\uff0cJUnit \u4f1a\u4e3a\u6bcf\u4e2a\u4e0a\u4e0b\u6587\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u6d4b\u8bd5\u7c7b\u5b9e\u4f8b\uff0c\u5e94\u7528\u5bf9\u5e94\u7684\u6269\u5c55\uff0c\u5e76\u5b8c\u6574\u8fd0\u884c\u751f\u547d\u5468\u671f\u65b9\u6cd5\u548c\u6d4b\u8bd5\u65b9\u6cd5\u5404\u4e00\u6b21<\/strong>\u3002<\/p>\n
4. \u5b9e\u7528\u793a\u4f8b<\/h2>\n
\u4e3a\u4e86\u66f4\u76f4\u89c2\u5730\u7406\u89e3\u8fd9\u4e9b\u6982\u5ff5\uff0c\u6211\u4eec\u6765\u6784\u9020\u4e00\u4e2a\u793a\u4f8b\uff1a\u7f16\u5199\u4e00\u4e2a\u6d4b\u8bd5\uff0c\u7528\u6765\u9a8c\u8bc1\u5728\u591a\u4e2a JVM Locale \u4e0b\u7684\u65e5\u671f\u683c\u5f0f\u5316\u903b\u8f91\u3002\u7531\u4e8e Locale \u4f1a\u5f71\u54cd\u6574\u4e2a\u6267\u884c\u73af\u5883\uff0c\u8fd9\u7c7b\u9700\u6c42\u975e\u5e38\u9002\u5408\u7528\u7c7b\u6a21\u677f\u6765\u5b9e\u73b0\u3002\u6211\u4eec\u53ea\u4fdd\u7559\u4e00\u4e2a<\/strong>\u6d4b\u8bd5\u7c7b\uff0c\u7136\u540e\u8ba9\u63d0\u4f9b\u8005\u5728\u4e0d\u540c\u914d\u7f6e\u4e0b\u591a\u6b21\u6267\u884c\u5b83\u3002<\/p>\n
4.1. \u65e5\u671f\u683c\u5f0f\u5316\u903b\u8f91<\/h3>\n
\u9996\u5148\uff0c\u4ece\u4e00\u4e2a\u5c0f\u5de5\u5177\u7c7b\u5f00\u59cb\uff0c\u5b83\u4f7f\u7528\u5f53\u524d JVM \u9ed8\u8ba4 Locale \u6765\u683c\u5f0f\u5316\u65e5\u671f\u3002\u53ea\u8981\u9ed8\u8ba4 Locale \u53d1\u751f\u53d8\u5316\uff0c\u5b83\u7684\u8f93\u51fa\u5c31\u4f1a\u968f\u4e4b\u6539\u53d8\uff1a<\/p>\n
class DateFormatter {\n\n    public String format(LocalDate date) {\n        DateTimeFormatter formatter = DateTimeFormatter.ofLocalizedDate(FormatStyle.LONG)\n            .withLocale(Locale.getDefault());\n\n        return date.format(formatter);\n    }\n}<\/code><\/pre>\n
\u6709\u4e86\u8fd9\u4e2a\u7c7b\u4e4b\u540e\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u5728\u591a\u79cd\u4e0d\u540c\u7684\u914d\u7f6e\u4e0b\u9a8c\u8bc1\u5b83\u7684\u884c\u4e3a\uff0c\u800c\u8fd9\u4e9b\u914d\u7f6e\u90fd\u7531\u7c7b\u6a21\u677f\u6765\u63d0\u4f9b\u3002<\/p>\n
4.2. \u63d0\u4f9b\u8005\u4e0e\u6269\u5c55<\/h3>\n
\u4e3a\u4e86\u652f\u6491\u4e0a\u8ff0\u9700\u6c42\uff0c\u6211\u4eec\u9996\u5148\u9700\u8981\u4e00\u4e2a\u6269\u5c55\uff0c\u7528\u6765\u5728\u5355\u6b21\u6267\u884c\u671f\u95f4\u8bbe\u7f6e\u9ed8\u8ba4 Locale\uff1a<\/p>\n
class LocaleExtension implements BeforeEachCallback, AfterEachCallback {\n\n    private final Locale locale;\n    private Locale previous;\n\n    @Override\n    public void beforeEach(ExtensionContext context) {\n        previous = Locale.getDefault();\n        Locale.setDefault(locale);\n    }\n\n    @Override\n    public void afterEach(ExtensionContext context) {\n        Locale.setDefault(previous);\n    }\n}<\/code><\/pre>\n
\u8fd9\u4e2a\u6269\u5c55\u4f1a\u5728\u6bcf\u6b21\u6d4b\u8bd5\u4e4b\u524d\u6682\u65f6\u66ff\u6362 JVM \u7684\u9ed8\u8ba4 Locale\uff0c\u5e76\u5728\u6d4b\u8bd5\u7ed3\u675f\u540e\u6062\u590d\u539f\u6709\u503c\u3002\u5728\u4e0d\u540c\u6267\u884c\u4e4b\u95f4\u552f\u4e00\u53d8\u5316\u7684\uff0c\u5c31\u662f\u4f20\u5165\u8be5\u6269\u5c55\u7684 Locale<\/code> \u5b9e\u4f8b\u3002<\/strong><\/p>\n
\u63a5\u4e0b\u6765\uff0c\u63d0\u4f9b\u8005\u4f1a\u901a\u8fc7 provideClassTemplateInvocationContexts()<\/code> \u65b9\u6cd5\u6765\u63d0\u4f9b\u4e0d\u540c\u7684\u4e0a\u4e0b\u6587\u3002\u6bcf\u4e2a\u4e0a\u4e0b\u6587\u90fd\u7531 invocationContext()<\/code> \u65b9\u6cd5\u521b\u5efa\uff0c\u8be5\u65b9\u6cd5\u901a\u8fc7 getDisplayName()<\/code> \u6307\u5b9a\u663e\u793a\u540d\uff0c\u5e76\u901a\u8fc7 getAdditionalExtensions()<\/code> \u5b89\u88c5\u5bf9\u5e94\u7684 LocaleExtension<\/code>\uff1a<\/p>\n
class DateLocaleClassTemplateProvider implements ClassTemplateInvocationContextProvider {\n\n    @Override\n    public Stream<ClassTemplateInvocationContext> provideClassTemplateInvocationContexts(ExtensionContext context) {\n        return Stream.of(Locale.US, Locale.GERMANY, Locale.ITALY, Locale.JAPAN)\n            .map(this::invocationContext);\n    }\n\n    private ClassTemplateInvocationContext invocationContext(Locale locale) {\n        return new ClassTemplateInvocationContext() {\n\n            @Override\n            public String getDisplayName(int invocationIndex) {\n                return "Locale: " + locale.getDisplayName();\n            }\n\n            @Override\n            public List<Extension> getAdditionalExtensions() {\n                return List.of(new LocaleExtension(locale));\n            }\n        };\n    }\n}<\/code><\/pre>\n
\u901a\u8fc7\u8fd9\u6837\u7684\u914d\u7f6e\uff0c\u6211\u4eec\u5c31\u5f97\u5230\u4e86\u4e92\u4e0d\u76f8\u540c\u7684\u6267\u884c\u73af\u5883\uff0c\u6700\u7ec8\u4f1a\u5bf9\u540c\u4e00\u4e2a\u6d4b\u8bd5\u7c7b\u6267\u884c\u56db\u6b21\u6d4b\u8bd5\u3002<\/p>\n
4.3. Class Template \u6d4b\u8bd5<\/h3>\n
\u6b64\u65f6\uff0c\u7c7b\u6a21\u677f\u7684\u6574\u4f53\u914d\u7f6e\u5df2\u7ecf\u5c31\u4f4d\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u4e13\u6ce8\u4e8e\u7f16\u5199\u4e00\u4e2a\u6d4b\u8bd5\u65b9\u6cd5\u4e86\u3002JUnit \u4f1a\u901a\u8fc7\u524d\u9762\u914d\u7f6e\u597d\u7684\u63d0\u4f9b\u8005\uff0c\u4e3a\u6bcf\u4e2a\u4e0a\u4e0b\u6587\u6267\u884c\u4e00\u6b21\u8fd9\u4e2a\u65b9\u6cd5\uff1a<\/p>\n
private final DateFormatter formatter = new DateFormatter();\n\n@Test\nvoid givenDefaultLocale_whenFormattingDate_thenMatchesLocalizedOutput() {\n    LocalDate date = LocalDate.of(2025, 9, 30);\n\n    DateTimeFormatter expectedFormatter = DateTimeFormatter.ofLocalizedDate(FormatStyle.LONG)\n        .withLocale(Locale.getDefault());\n\n    String expected = date.format(expectedFormatter);\n    String formatted = formatter.format(date);\n\n    LOG.info("Locale: {}, Expected: {}, Formatted: {}", Locale.getDefault(), expected, formatted);\n\n    assertEquals(expected, formatted);\n}<\/code><\/pre>\n
\u5728\u6bcf\u6b21\u6267\u884c\u4e2d\uff0c\u6d4b\u8bd5\u90fd\u4f1a\u57fa\u4e8e\u5f53\u524d\u9ed8\u8ba4 Locale \u8ba1\u7b97\u9884\u671f\u503c\uff0c\u5e76\u4e0e DateFormatter<\/code> \u7684\u8f93\u51fa\u8fdb\u884c\u6bd4\u8f83\u3002\u7c7b\u6a21\u677f\u548c\u63d0\u4f9b\u8005\u8d1f\u8d23\u5728\u6bcf\u6b21\u6267\u884c\u4e4b\u95f4\u5207\u6362\u73af\u5883\u8bbe\u7f6e<\/strong>\uff0c\u56e0\u6b64\u6d4b\u8bd5\u4ee3\u7801\u672c\u8eab\u53ef\u4ee5\u4fdd\u6301\u7b80\u5355\u3001\u5e72\u51c0\uff0c\u4e0d\u9700\u8981\u4efb\u4f55\u5206\u652f\u903b\u8f91\u3002<\/p>\n
4.4. \u6d4b\u8bd5\u8f93\u51fa<\/h3>\n
\u6700\u540e\uff0c\u5f53\u6211\u4eec\u8fd0\u884c\u8fd9\u7ec4\u6d4b\u8bd5\u65f6\uff0c\u540c\u4e00\u4e2a\u6d4b\u8bd5\u7c7b\u4f1a\u5728\u6bcf\u4e2a Locale \u4e0b\u6267\u884c\u4e00\u6b21\uff0c\u800c\u6bcf\u6b21\u7684\u683c\u5f0f\u5316\u7ed3\u679c\u90fd\u4e0d\u76f8\u540c\uff1a<\/p>\n
Locale: en_US, Expected: September 30, 2025, Formatted: September 30, 2025\nLocale: de_DE, Expected: 30. September 2025, Formatted: 30. September 2025\nLocale: it_IT, Expected: 30 settembre 2025, Formatted: 30 settembre 2025\nLocale: ja_JP, Expected: 2025\u5e749\u670830\u65e5, Formatted: 2025\u5e749\u670830\u65e5<\/code><\/pre>\n
\u53ef\u4ee5\u770b\u5230\uff0c\u6bcf\u4e00\u884c\u90fd\u5bf9\u5e94\u4e8e\u4e00\u4e2a\u8c03\u7528\u4e0a\u4e0b\u6587\u3002\u6d4b\u8bd5\u4ee3\u7801\u5728\u8fd9\u4e9b\u8fd0\u884c\u4e4b\u95f4\u5b8c\u5168\u6ca1\u6709\u53d8\u5316\uff1b\u53d8\u5316\u7684\u53ea\u662f\u7531\u63d0\u4f9b\u8005\u548c\u6269\u5c55\u914d\u7f6e\u51fa\u6765\u7684\u6267\u884c\u73af\u5883\u3002<\/p>\n
5. \u603b\u7ed3<\/h2>\n
\u5728\u672c\u6587\u4e2d\uff0c\u6211\u4eec\u4ece\u57fa\u7840\u6982\u5ff5\u51fa\u53d1\uff0c\u8fdb\u4e00\u6b65\u6df1\u5165\u4e86 @ClassTemplate<\/code> \u7684\u4f7f\u7528\u65b9\u5f0f\uff0c\u91cd\u70b9\u8003\u5bdf\u4e86\u63d0\u4f9b\u8005\u5982\u4f55\u4e3a\u5355\u4e2a\u6d4b\u8bd5\u7c7b\u63d0\u4f9b\u591a\u4e2a\u6267\u884c\u4e0a\u4e0b\u6587\u3002\u901a\u8fc7 Locale \u793a\u4f8b\uff0c\u6211\u4eec\u770b\u5230\u63d0\u4f9b\u8005\u548c\u6269\u5c55\u53ef\u4ee5\u5728\u4e0d\u4fee\u6539\u6d4b\u8bd5\u4ee3\u7801\u7684\u524d\u63d0\u4e0b\u7075\u6d3b\u5730\u5207\u6362\u6d4b\u8bd5\u73af\u5883\u3002\u8fd9\u4f7f\u5f97\u7c7b\u6a21\u677f\u6210\u4e3a\u5904\u7406\u5168\u5c40\u8bbe\u7f6e\u6216\u914d\u7f6e\u7ea7\u884c\u4e3a\u6d4b\u8bd5\u7684\u4e00\u79cd\u5e72\u51c0\u800c\u4f18\u96c5\u7684\u89e3\u51b3\u65b9\u6848<\/strong>\u3002\u611f\u8c22\u9605\u8bfb\uff0c\u5982\u679c\u60a8\u5bf9Java\u5185\u5bb9\u611f\u5174\u8da3\uff0c\u4e5f\u53ef\u4ee5\u5173\u6ce8\u6211\u7684Java\u4e13\u9898<\/a>\u5185\u5bb9\u3002<\/p>\n
https:\/\/segmentfault.com\/a\/1190000047479511<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
\u5f53\u4f60\u5728\u672c\u5730\u3001\u6d4b\u8bd5\u73af\u5883\u548c CI \u4e2d\u8dd1\u540c\u4e00\u7ec4\u6d4b\u8bd5\u65f6\uff0c\u662f\u5426\u9047\u5230\u8fc7\u8fd9\u6837\u7684\u56f0\u60d1\uff1a\u540c\u4e00\u6bb5\u4e1a\u52a1\u903b\u8f91\u5728\u4e0d\u540c\u914d\u7f6e\u3001\u4e0d\u540c Loca […]<\/p>\n","protected":false},"author":7,"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-10021121","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\/10021121","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\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10021121"}],"version-history":[{"count":0,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10021121\/revisions"}],"wp:attachment":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10021121"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10021121"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10021121"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}