{"id":10006297,"date":"2022-08-24T04:33:05","date_gmt":"2022-08-23T20:33:05","guid":{"rendered":"https:\/\/ityet.com\/?p=10006297"},"modified":"2022-08-24T04:33:05","modified_gmt":"2022-08-23T20:33:05","slug":"spring%e6%8e%a5%e5%8f%a3%e5%a4%9a%e5%ae%9e%e7%8e%b0%e7%b1%bb%ef%bc%8c%e8%af%a5%e4%be%9d%e8%b5%96%e6%b3%a8%e5%85%a5%e5%93%aa%e4%b8%80%e4%b8%aa%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10006297","title":{"rendered":"spring\u63a5\u53e3\u591a\u5b9e\u73b0\u7c7b\uff0c\u8be5\u4f9d\u8d56\u6ce8\u5165\u54ea\u4e00\u4e2a\uff1f"},"content":{"rendered":"<h2>\u4e00\u3001\u95ee\u9898\u7684\u63cf\u8ff0<\/h2>\n<p>\u5728\u5b9e\u9645\u7684\u7cfb\u7edf\u5e94\u7528\u5f00\u53d1\u4e2d\u6211\u7ecf\u5e38\u4f1a\u9047\u5230\u8fd9\u6837\u7684\u4e00\u7c7b\u9700\u6c42\uff0c\u76f8\u4fe1\u5927\u5bb6\u5728\u5de5\u4f5c\u4e2d\u4e5f\u4f1a\u7ecf\u5e38\u9047\u5230\uff1a<\/p>\n<ul>\n<li>\u540c\u4e00\u4e2a\u7cfb\u7edf\u5728\u591a\u4e2a\u7701\u4efd\u90e8\u7f72\u3002<\/li>\n<li>\u4e00\u4e2a\u4e1a\u52a1\u5728\u5317\u4eac\u662f\u4e00\u79cd\u5b9e\u73b0\u65b9\u5f0f\uff0c\u662f\u57fa\u4e8e\u5317\u4eac\u7528\u6237\u7684\u9700\u6c42\u3002<\/li>\n<li>\u540c\u6837\u7684\u4e1a\u52a1\u5728\u4e0a\u6d77\u662f\u53e6\u5916\u4e00\u79cd\u5b9e\u73b0\u65b9\u5f0f\uff0c\u4e0e\u5317\u4eac\u7684\u5b9e\u73b0\u65b9\u5f0f\u5927\u540c\u5c0f\u5f02<\/li>\n<\/ul>\n<p>\u9047\u5230\u8fd9\u6837\u7684\u9700\u6c42\uff0c\u6211\u4eec\u901a\u5e38\u4f1a\u5b9a\u4e49\u4e00\u4e2a\u4e1a\u52a1\u5b9e\u73b0\u7684\u63a5\u53e3\uff0c\u6bd4\u5982\uff1a<\/p>\n<pre><code class=\"java\">public interface IDemoService {\n  public void doSomething();\n}<\/code><\/pre>\n<p>\u5728\u5317\u4eac\u73af\u5883\u4e0b\u8fd9\u6837\u5b9e\u73b0\uff0c\u6bd4\u5982\uff1a<\/p>\n<pre><code class=\"java\">@Component\npublic class DemoServiceBeijing implements IDemoService {\n  @Override\n  public void doSomething() {System.out.println(&quot;\u5317\u4eac\u7684\u4e1a\u52a1\u5b9e\u73b0&quot;);}\n}<\/code><\/pre>\n<p>\u5728\u4e0a\u6d77\u73af\u5883\u4e0b\u8fd9\u6837\u5b9e\u73b0\uff0c\u6bd4\u5982\uff1a<\/p>\n<pre><code class=\"java\">@Component\npublic class DemoServiceShanghai implements IDemoService {\n  @Override\n  public void doSomething() {System.out.println(&quot;\u4e0a\u6d77\u7684\u4e1a\u52a1\u5b9e\u73b0&quot;);}\n}<\/code><\/pre>\n<p>\u7136\u540e\u6211\u4eec\u5199\u4e00\u4e2a\u6a21\u62df\u4e1a\u52a1\u6d4b\u8bd5\u7528\u4f8b<\/p>\n<pre><code class=\"java\">@SpringBootTest\nclass DemoApplicationTests {\n    \/\/\u8fd9\u91cc\u6ce8\u5165\u7684demoService\u662fDemoServiceShanghai\uff0c\u8fd8\u662fDemoServiceBeijing\uff1f\n    @Resource\n    IDemoService demoService;  \n    @Test\n    void testDemoService() {\n        demoService.doSomething();\n    }\n}<\/code><\/pre>\n<p>\u5f53\u6211\u4eec\u6267\u884c\u8fd9\u4e2a\u6d4b\u8bd5\u7528\u4f8b\u7684\u65f6\u5019\u4e00\u5b9a\u4f1a\u62a5\u9519\uff0c\u56e0\u4e3aSpring\u53d1\u73b0\u4e86\u4e24\u4e2aIDemoService\u7684\u5b9e\u73b0\u7c7b\u3002\u5b83\u4e0d\u77e5\u9053\u53bb\u5b9e\u4f8b\u5316\u54ea\u4e00\u4e2a\u5b9e\u73b0\u7c7b\uff0c\u6765\u4f5c\u4e3aIDemoService\u7684\u5b9e\u9645\u4e1a\u52a1\u5904\u7406bean\u3002\u5f53\u7136\u6211\u4eec\u671f\u671b\u7684\u72b6\u6001\u662f\uff1a<\/p>\n<ul>\n<li>\u5728\u5317\u4eac\u90e8\u7f72\u7cfb\u7edf\u7684\u65f6\u5019\uff0c\u4f7f\u7528DemoServiceBeijing\u4f5c\u4e3aIDemoService\u7684\u5b9e\u73b0\u7c7b\u5b8c\u6210\u4f9d\u8d56\u6ce8\u5165<\/li>\n<li>\u5728\u4e0a\u6d77\u90e8\u7f72\u7cfb\u7edf\u7684\u65f6\u5019\uff0c\u4f7f\u7528DemoServiceShanghai\u4f5c\u4e3aIDemoService\u7684\u5b9e\u73b0\u7c7b\u5b8c\u6210\u4f9d\u8d56\u6ce8\u5165<\/li>\n<\/ul>\n<h2>\u4e8c\u3001\u76f8\u5bf9\u4f4e\u7ea7\u89e3\u51b3\u65b9\u6848<\/h2>\n<p>\u9762\u5bf9\u4e0a\u9762\u7684\u9700\u6c42\uff0c\u5148\u8bf4\u51e0\u4e2a\u76f8\u5bf9\u4f4e\u7ea7\u7684\u89e3\u51b3\u65b9\u6848\uff0c\u8fd9\u51e0\u4e2a\u65b9\u6848\u867d\u7136\u53ef\u4ee5\u5b9e\u73b0\u6211\u4eec\u671f\u671b\u7684\u72b6\u6001\uff0c\u4f46\u662f\u5bf9\u8fd0\u7ef4\u4e0d\u591f\u53cb\u597d\u3002<\/p>\n<h3>2.1. \u65b9\u6848\u4e00\uff1a\u4f7f\u7528<code>@Primary<\/code>\u6ce8\u89e3<\/h3>\n<p>\u5047\u5982\u5728\u5317\u4eac\u90e8\u7f72\u7cfb\u7edf\u7684\u65f6\u5019\uff0c\u5728DemoServiceBeijing\u7684\u7c7b\u4e0a\u9762\u52a0\u4e0a<code>@Primary<\/code>,\u8be5\u6ce8\u89e3\u7684\u4f5c\u7528\u5c31\u662f\u5f3a\u8feb\u4ece\u591a\u4e2a\u5b9e\u73b0\u7c7b\u91cc\u9762\u9009\u4e00\u4e2a\u5b9e\u73b0\u7c7b\uff0c\u5982\u679cSpring\u4e0d\u77e5\u9053\u9009\u54ea\u4e00\u4e2a\uff0c\u6211\u4eec\u544a\u8bc9\u5b83\u4e00\u4e2a\u9ed8\u8ba4\u7684\u3002<\/p>\n<pre><code class=\"java\">@Primary\n@Component\npublic class DemoServiceBeijing implements IDemoService {<\/code><\/pre>\n<h3>2.2.  \u65b9\u6848\u4e8c\uff1a\u4f7f\u7528<code>@Resource<\/code>\u6ce8\u89e3<\/h3>\n<p>\u56e0\u4e3aResource\u6ce8\u89e3\u9ed8\u8ba4\u4f7f\u7528\u540d\u79f0\u8fdb\u884c\u4f9d\u8d56\u6ce8\u5165\uff0c\u6240\u4ee5\u53d8\u91cf\u540d\u660e\u786e\u53eb\u505ademoServiceBeijing\uff08\u9996\u5b57\u6bcd\u5c0f\u5199\uff09\uff0c\u4f7f\u7528\u7684\u5c31\u662fDemoServiceBeijing\u5b9e\u73b0\u7c7b\u3002<\/p>\n<pre><code class=\"java\">@Resource\nIDemoService demoServiceBeijing;  \/\/\u8fd9\u91cc\u7684\u53d8\u91cf\u540d\u79f0\u6307\u5b9a\u4e86bean\u540d\u79f0\n\/\/IDemoService demoService;  \u88ab\u66ff\u6362\u6389<\/code><\/pre>\n<p>\u6216\u8005<\/p>\n<pre><code class=\"java\">@Resource(name = &quot;demoServiceBeijing&quot;)  \/\/\u4f7f\u7528resource\u6ce8\u89e3\u660e\u786e\u6307\u5b9a\u540d\u79f0\nIDemoService demoService;<\/code><\/pre>\n<h3>2.3.\u65b9\u6848\u4e09\uff1a\u4f7f\u7528<code>@Qualifier<\/code>\u6ce8\u89e3<\/h3>\n<p>\u4e0e\u4e0a\u6587\u540c\u6837\u7684\u9053\u7406\uff0c\u4f7f\u7528<code>@Qualifier<\/code>\u6ce8\u89e3\uff0c\u6307\u5b9abean\u7684\u540d\u79f0\u8fdb\u884c\u4f9d\u8d56\u6ce8\u5165<\/p>\n<pre><code class=\"java\">@Qualifier(&quot;demoServiceBeijing&quot;)  \/\/\u4f7f\u7528Qualifier\u6ce8\u89e3\u660e\u786e\u6307\u5b9a\u540d\u79f0\n@Resource\nIDemoService demoService;<\/code><\/pre>\n<p>\u4e0a\u9762\u6240\u63d0\u5230\u7684\u4e09\u4e2a\u65b9\u6848\u867d\u7136\u90fd\u53ef\u4ee5\u89e3\u51b3\uff1a\u5728\u4e0d\u540c\u7684\u90e8\u7f72\u73af\u5883\u4e0b\u4f7f\u7528\u4e0d\u540c\u7684\u63a5\u53e3\u5b9e\u73b0\u7c7b\u5b8c\u6210\u4f9d\u8d56\u6ce8\u5165\u7684\u95ee\u9898\u3002\u4f46\u662f\u8fd9\u6837\u4e0d\u597d\uff0c\u56e0\u4e3a\u4e00\u65e6\u6211\u4eec\u8981\u628a\u90e8\u7f72\u73af\u5883\u4ecebeijing\uff08\u5317\u4eac\uff09\u6362\u6210shanghai\uff08\u4e0a\u6d77\uff09\uff0c\u5c31\u9700\u8981\u628a\u4e0a\u9762\u7684\u6ce8\u89e3\u7684\u4f4d\u7f6e\u6216\u8005\u5185\u5bb9\u5168\u90fd\u4fee\u6539\u4e00\u904d\uff08\u6240\u6709\u7684\u5b9e\u73b0\u7c7b\u4ee3\u7801\u90fd\u8981\u4fee\u6539\uff09\u3002<\/p>\n<h2>\u4e09\u3001\u76f8\u5bf9\u9ad8\u7ea7\u7684\u89e3\u51b3\u65b9\u6848<\/h2>\n<p>\u6211\u4eec\u63d0\u51fa\u8fdb\u4e00\u6b65\u7684\u671f\u671b\uff1a\u5c31\u662f\u53ea\u4fee\u6539\u4e00\u4e2a\u914d\u7f6e\u5c31\u80fd\u5b8c\u6210\u90e8\u7f72\u73af\u5883\u5207\u6362\u7684\u64cd\u4f5c\u3002\u6bd4\u5982\uff1a<\/p>\n<pre><code class=\"yml\">deploy:\n  province: beijing<\/code><\/pre>\n<p>\u5f53\u6211\u4eec\u671f\u671b\u628a\u90e8\u7f72\u73af\u5883\u4ece\u5317\u4eac\u5207\u6362\u5230\u4e0a\u6d77\u7684\u65f6\u5019\uff0c\u53ea\u9700\u8981\u5c06\u4e0a\u6587\u914d\u7f6e\u4e2d\u7684beijing \u6539\u6210 shanghai \uff0c\u8fd9\u8be5\u600e\u4e48\u5b9e\u73b0\u5462\uff1f<\/p>\n<ul>\n<li>\u5728\u5317\u4eac\u7684\u5b9e\u73b0\u7c7b\u4e0a\u9762\u52a0\u4e0aConditionalOnProperty\u6ce8\u89e3\uff0chavingValue\u7684\u503c\u4e3abeijing<\/li>\n<\/ul>\n<pre><code class=\"java\">@Component\n@ConditionalOnProperty(value=&quot;deploy.province&quot;,havingValue = &quot;beijing&quot;)\npublic class DemoServiceBeijing implements IDemoService {<\/code><\/pre>\n<ul>\n<li>\u5728\u4e0a\u6d77\u7684\u5b9e\u73b0\u7c7b\u4e0a\u9762\u52a0\u4e0aConditionalOnProperty\u6ce8\u89e3\uff0chavingValue\u7684\u503c\u4e3ashanghai<\/li>\n<\/ul>\n<pre><code class=\"java\">@Component\n@ConditionalOnProperty(value=&quot;deploy.province&quot;,havingValue = &quot;shanghai&quot;)\npublic class DemoServiceShanghai implements IDemoService {<\/code><\/pre>\n<p><strong>ConditionalOnProperty\u6ce8\u89e3\u5728\u8fd9\u91cc\u7684\u4f5c\u7528\u5c31\u662f<\/strong>\uff1a\u8bfb\u53d6\u914d\u7f6e\u6587\u4ef6\u53d1\u73b0<code>deploy.province<\/code>,\u5e76\u5c06\u8be5\u914d\u7f6e\u7684\u503c\u4e0ehavingValue\u5339\u914d\uff0c\u5339\u914d\u4e0a\u54ea\u4e00\u4e2a\u5c31\u5b9e\u4f8b\u5316\u54ea\u4e00\u4e2a\u7c7b\u4f5c\u4e3a\u8be5\u63a5\u53e3\u7684\u5b9e\u73b0\u7c7bbean\u6ce8\u5165\u5230Spring\u5bb9\u5668\u4e2d\uff08\u5f53\u7136\u6ce8\u5165\u8fc7\u7a0b\u9700\u8981\u914d\u5408<code>@Component<\/code>\u6ce8\u89e3\u5b9e\u73b0\uff09\u3002<\/p>\n<p>\u6b22\u8fce\u5173\u6ce8\u6211\u7684\u516c\u544a\u53f7\uff1a\u5b57\u6bcd\u54e5\u6742\u8c08\uff0c\u56de\u590d003\u8d60\u9001\u4f5c\u8005\u4e13\u680f\u300adocker\u4fee\u70bc\u4e4b\u9053\u300b\u7684PDF\u7248\u672c\uff0c30\u4f59\u7bc7\u7cbe\u54c1docker\u6587\u7ae0\u3002\u5b57\u6bcd\u54e5\u535a\u5ba2\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=fsQqP62M%2BCoM18AIZY3nUQ%3D%3D.J57c3lVSseYo71O7LYZN4wDKmk%2F5gFYsYEBqz8QknGM%3D\" rel=\"nofollow\">zimug.com<\/a><\/p>\n<p><a href=\"https:\/\/segmentfault.com\/a\/1190000042366375\">https:\/\/segmentfault.com\/a\/1190000042366375<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3001\u95ee\u9898\u7684\u63cf\u8ff0 \u5728\u5b9e\u9645\u7684\u7cfb\u7edf\u5e94\u7528\u5f00\u53d1\u4e2d\u6211\u7ecf\u5e38\u4f1a\u9047\u5230\u8fd9\u6837\u7684\u4e00\u7c7b\u9700\u6c42\uff0c\u76f8\u4fe1\u5927\u5bb6\u5728\u5de5\u4f5c\u4e2d\u4e5f\u4f1a\u7ecf\u5e38\u9047\u5230\uff1a \u540c\u4e00\u4e2a\u7cfb\u7edf\u5728 [&hellip;]<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[],"tags":[],"class_list":["post-10006297","post","type-post","status-publish","format-standard","hentry"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10006297","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"}],"replies":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10006297"}],"version-history":[{"count":0,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10006297\/revisions"}],"wp:attachment":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10006297"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10006297"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10006297"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}