{"id":868,"date":"2023-03-09T21:37:13","date_gmt":"2023-03-09T13:37:13","guid":{"rendered":"https:\/\/www.appblog.cn\/?p=868"},"modified":"2023-04-29T16:44:28","modified_gmt":"2023-04-29T08:44:28","slug":"spring-boot-initialize-resources-when-project-starts","status":"publish","type":"post","link":"https:\/\/www.appblog.cn\/index.php\/2023\/03\/09\/spring-boot-initialize-resources-when-project-starts\/","title":{"rendered":"Spring Boot\u9879\u76ee\u542f\u52a8\u65f6\u521d\u59cb\u5316\u8d44\u6e90"},"content":{"rendered":"

\u5728\u6211\u4eec\u5b9e\u9645\u5de5\u4f5c\u4e2d\uff0c\u603b\u4f1a\u9047\u5230\u8fd9\u6837\u9700\u6c42\uff0c\u5728\u9879\u76ee\u542f\u52a8\u7684\u65f6\u5019\u9700\u8981\u505a\u4e00\u4e9b\u521d\u59cb\u5316\u7684\u64cd\u4f5c\uff0c\u6bd4\u5982\u521d\u59cb\u5316\u7ebf\u7a0b\u6c60\uff0c\u63d0\u524d\u52a0\u8f7d\u597d\u52a0\u5bc6\u8bc1\u4e66\u7b49\u3002CommandLineRunner<\/code>\u5c31\u662f\u4e13\u95e8\u89e3\u51b3\u9879\u76ee\u542f\u52a8\u521d\u59cb\u5316\u8d44\u6e90\u64cd\u4f5c\u3002<\/p>\n

CommandLineRunner\u57fa\u672c\u4f7f\u7528<\/h2>\n

<\/p>\n

CommandLineRunner<\/code>\u63a5\u53e3\u7684Component<\/code>\u4f1a\u5728\u6240\u6709Spring Beans<\/code>\u90fd\u521d\u59cb\u5316\u4e4b\u540e\uff0cSpringApplication.run()<\/code>\u4e4b\u524d\u6267\u884c\uff0c\u975e\u5e38\u9002\u5408\u5728\u5e94\u7528\u7a0b\u5e8f\u542f\u52a8\u4e4b\u521d\u8fdb\u884c\u4e00\u4e9b\u6570\u636e\u521d\u59cb\u5316\u7684\u5de5\u4f5c\u3002<\/p>\n

\u63a5\u4e0b\u6765\u6211\u4eec\u5c31\u8fd0\u7528\u6848\u4f8b\u6d4b\u8bd5\u5b83\u5982\u4f55\u4f7f\u7528\uff0c\u5728\u6d4b\u8bd5\u4e4b\u524d\u5728\u542f\u52a8\u7c7b\u52a0\u4e24\u884c\u6253\u5370\u63d0\u793a\uff0c\u65b9\u4fbf\u6211\u4eec\u8bc6\u522bCommandLineRunner<\/code>\u7684\u6267\u884c\u65f6\u673a\u3002<\/p>\n

@SpringBootApplication\npublic class CommandLineRunnerApplication {\n    public static void main(String[] args) {\n        System.out.println("The service to start.");\n        SpringApplication.run(CommandLineRunnerApplication.class, args);\n        System.out.println("The service has started.");\n    }\n}<\/code><\/pre>\n
\u63a5\u4e0b\u6765\u6211\u4eec\u76f4\u63a5\u521b\u5efa\u4e00\u4e2a\u7c7b\u7ee7\u627fCommandLineRunner<\/code>\uff0c\u5e76\u5b9e\u73b0\u5b83\u7684run()<\/code>\u65b9\u6cd5<\/p>\n
@Component\npublic class Runner implements CommandLineRunner {\n    @Override\n    public void run(String... args) throws Exception {\n        System.out.println("The Runner start to initialize ...");\n    }\n}<\/code><\/pre>\n
\u5728run()<\/code>\u65b9\u6cd5\u4e2d\u6253\u5370\u4e86\u4e00\u4e9b\u53c2\u6570\u6765\u770b\u51fa\u5b83\u7684\u6267\u884c\u65f6\u673a\u3002\u5b8c\u6210\u4e4b\u540e\u542f\u52a8\u9879\u76ee\u8fdb\u884c\u6d4b\u8bd5\uff1a<\/p>\n
The service to start.\n\n  .   ____          _            __ _ _\n \/\\\\ \/ ___'_ __ _ _(_)_ __  __ _ \\ \\ \\ \\\n( ( )\\___ | '_ | '_| | '_ \\\/ _` | \\ \\ \\ \\\n \\\\\/  ___)| |_)| | | | | || (_| |  ) ) ) )\n  '  |____| .__|_| |_|_| |_\\__, | \/ \/ \/ \/\n =========|_|==============|___\/=\/_\/_\/_\/\n :: Spring Boot ::        (v2.1.3.RELEASE)\n\n...\n\nTomcat started on port(s): 8080 (http) with context path ''\nStarted CommandLineRunnerApplication in 2.952 seconds (JVM running for 4.556)\nThe Runner start to initialize ...\nThe service has started.<\/code><\/pre>\n
\u6839\u636e\u63a7\u5236\u53f0\u7684\u6253\u5370\u4fe1\u606f\u6211\u4eec\u53ef\u4ee5\u770b\u51faCommandLineRunner<\/code>\u4e2d\u7684\u65b9\u6cd5\u4f1a\u5728 Spring Boot \u5bb9\u5668\u52a0\u8f7d\u4e4b\u540e\u6267\u884c\uff0c\u6267\u884c\u5b8c\u6210\u540e\u9879\u76ee\u542f\u52a8\u5b8c\u6210\u3002<\/p>\n
CommandLineRunner\u6267\u884c\u987a\u5e8f<\/h2>\n
\u5982\u679c\u6211\u4eec\u5728\u542f\u52a8\u5bb9\u5668\u7684\u65f6\u5019\u9700\u8981\u521d\u59cb\u5316\u5f88\u591a\u8d44\u6e90\uff0c\u5e76\u4e14\u521d\u59cb\u5316\u8d44\u6e90\u76f8\u4e92\u4e4b\u95f4\u6709\u5e8f\uff0c\u90a3\u5982\u4f55\u4fdd\u8bc1\u4e0d\u540c\u7684CommandLineRunner<\/code>\u7684\u6267\u884c\u987a\u5e8f\u5462\uff1fSpring Boot \u4e5f\u7ed9\u51fa\u4e86\u89e3\u51b3\u65b9\u6848\u3002\u90a3\u5c31\u662f\u4f7f\u7528@Order<\/code>\u6ce8\u89e3\u3002<\/p>\n
\u6211\u4eec\u521b\u5efa\u4e24\u4e2aCommandLineRunner<\/code>\u7684\u5b9e\u73b0\u7c7b\u6765\u8fdb\u884c\u6d4b\u8bd5\uff1a<\/p>\n
\u7b2c\u4e00\u4e2a\u5b9e\u73b0\u7c7b\uff1a<\/p>\n
@Component\n@Order(1)\npublic class OrderRunner1 implements CommandLineRunner {\n    @Override\n    public void run(String... args) throws Exception {\n        System.out.println("The OrderRunner1 start to initialize ...");\n    }\n}<\/code><\/pre>\n
\u7b2c\u4e8c\u4e2a\u5b9e\u73b0\u7c7b\uff1a<\/p>\n
@Component\n@Order(2)\npublic class OrderRunner2 implements CommandLineRunner {\n    @Override\n    public void run(String... args) throws Exception {\n        System.out.println("The OrderRunner2 start to initialize ...");\n    }\n}<\/code><\/pre>\n
\u6dfb\u52a0\u5b8c\u6210\u4e4b\u540e\u91cd\u65b0\u542f\u52a8\uff0c\u89c2\u5bdf\u6267\u884c\u987a\u5e8f\uff1a<\/p>\n
The service to start.\n\n  .   ____          _            __ _ _\n \/\\\\ \/ ___'_ __ _ _(_)_ __  __ _ \\ \\ \\ \\\n( ( )\\___ | '_ | '_| | '_ \\\/ _` | \\ \\ \\ \\\n \\\\\/  ___)| |_)| | | | | || (_| |  ) ) ) )\n  '  |____| .__|_| |_|_| |_\\__, | \/ \/ \/ \/\n =========|_|==============|___\/=\/_\/_\/_\/\n :: Spring Boot ::        (v2.1.3.RELEASE)\n\nTomcat started on port(s): 8080 (http) with context path ''\nStarted CommandLineRunnerApplication in 3.119 seconds (JVM running for 4.554)\nThe OrderRunner1 start to initialize ...\nThe OrderRunner2 start to initialize ...\nThe Runner start to initialize ...\nThe service has started.<\/code><\/pre>\n
\u901a\u8fc7\u63a7\u5236\u53f0\u7684\u8f93\u51fa\u6211\u4eec\u53d1\u73b0\uff0c\u6dfb\u52a0@Order<\/code>\u6ce8\u89e3\u7684\u5b9e\u73b0\u7c7b\u6700\u5148\u6267\u884c\uff0c\u5e76\u4e14@Order()<\/code>\u91cc\u9762\u7684\u503c\u8d8a\u5c0f\u542f\u52a8\u8d8a\u65e9\u3002<\/p>\n
\u5728\u5b9e\u8df5\u4e2d\uff0c\u4f7f\u7528ApplicationRunner<\/code>\u4e5f\u53ef\u4ee5\u8fbe\u5230\u76f8\u540c\u7684\u76ee\u7684\uff0c\u4e24\u7740\u5dee\u522b\u4e0d\u5927\u3002\u770b\u6765\u4f7f\u7528 Spring Boot \u89e3\u51b3\u521d\u59cb\u5316\u8d44\u6e90\u7684\u95ee\u9898\u975e\u5e38\u7b80\u5355\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5728\u6211\u4eec\u5b9e\u9645\u5de5\u4f5c\u4e2d\uff0c\u603b\u4f1a\u9047\u5230\u8fd9\u6837\u9700\u6c42\uff0c\u5728\u9879\u76ee\u542f\u52a8\u7684\u65f6\u5019\u9700\u8981\u505a\u4e00\u4e9b\u521d\u59cb\u5316\u7684\u64cd\u4f5c\uff0c\u6bd4\u5982\u521d\u59cb\u5316\u7ebf\u7a0b\u6c60\uff0c\u63d0\u524d\u52a0\u8f7d\u597d\u52a0\u5bc6\u8bc1 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[41],"tags":[],"class_list":["post-868","post","type-post","status-publish","format-standard","hentry","category-spring-boot"],"_links":{"self":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/868","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/comments?post=868"}],"version-history":[{"count":0,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/868\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/media?parent=868"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/categories?post=868"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/tags?post=868"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}