{"id":2971,"date":"2023-07-14T17:28:05","date_gmt":"2023-07-14T09:28:05","guid":{"rendered":"https:\/\/xinchewhd.com.cn\/?p=2971"},"modified":"2023-07-14T17:43:55","modified_gmt":"2023-07-14T09:43:55","slug":"6-%e7%a7%8d%e6%96%b9%e5%bc%8f%e8%af%bb%e5%8f%96-springboot-%e7%9a%84%e9%85%8d%e7%bd%ae%ef%bc%88%e5%8e%9f%e7%90%86%e5%ae%9e%e6%88%98%ef%bc%89","status":"publish","type":"post","link":"https:\/\/xinchewhd.com.cn\/index.php\/spring-boot\/6-%e7%a7%8d%e6%96%b9%e5%bc%8f%e8%af%bb%e5%8f%96-springboot-%e7%9a%84%e9%85%8d%e7%bd%ae%ef%bc%88%e5%8e%9f%e7%90%86%e5%ae%9e%e6%88%98%ef%bc%89\/","title":{"rendered":"6 \u79cd\u65b9\u5f0f\u8bfb\u53d6 Springboot \u7684\u914d\u7f6e\uff08\u539f\u7406+\u5b9e\u6218\uff09"},"content":{"rendered":"
\n

<\/p>\n

\n \u4ece\u914d\u7f6e\u6587\u4ef6\u4e2d\u83b7\u53d6\u5c5e\u6027\u5e94\u8be5\u662f<\/span>SpringBoot<\/code>\u5f00\u53d1\u4e2d\u6700\u4e3a\u5e38\u7528\u7684\u529f\u80fd\u4e4b\u4e00\uff0c\u4f46\u5c31\u662f\u8fd9\u4e48\u5e38\u7528\u7684\u529f\u80fd\uff0c\u4ecd\u7136\u6709\u5f88\u591a\u5f00\u53d1\u8005\u5728\u8fd9\u4e2a\u65b9\u9762\u8e29\u5751\u3002<\/span>
\n <\/section>\n

<\/strong><\/p>\n

\u6211\u6574\u7406\u4e86\u51e0\u79cd\u83b7\u53d6\u914d\u7f6e\u5c5e\u6027\u7684\u65b9\u5f0f\uff0c\u76ee\u7684\u4e0d\u4ec5\u662f\u8981\u8ba9\u5927\u5bb6\u5b66\u4f1a\u5982\u4f55\u4f7f\u7528\uff0c\u66f4\u91cd\u8981\u7684\u662f\u5f04\u6e05\u914d\u7f6e\u52a0\u8f7d\u3001\u8bfb\u53d6\u7684\u5e95\u5c42\u539f\u7406<\/strong>\uff0c\u4e00\u65e6\u51fa\u73b0\u95ee\u9898\u53ef\u4ee5\u5206\u6790\u51fa\u5176\u75c7\u7ed3\u6240\u5728\uff0c\u800c\u4e0d\u662f\u4e00\u62a5\u9519\u53d6\u4e0d\u5230\u5c5e\u6027\uff0c\u65e0\u5934\u82cd\u8747\u822c\u7684\u91cd\u542f\u9879\u76ee\uff0c\u5728\u53e5\u53e5\u5367\u69fd<\/strong>\u4e2d\u9010\u6e10\u6293\u72c2\uff5e<\/p>\n

\n

\u4ee5\u4e0b\u793a\u4f8b\u6e90\u7801 Springboot \u7248\u672c\u5747\u4e3a 2.7.6<\/p>\n<\/blockquote>\n

\u4e0b\u8fb9\u6211\u4eec\u4e00\u4e00\u8fc7\u4e0b\u8fd9\u51e0\u79cd\u73a9\u6cd5\u548c\u539f\u7406\uff0c\u770b\u770b\u6709\u54ea\u4e9b\u662f\u4f60\u6ca1\u7528\u8fc7\u7684\uff01\u8bdd\u4e0d\u591a\u8bf4\uff0c\u5f00\u59cb\u641e\uff5e<\/p>\n

<\/span>\u4e00\u3001Environment<\/span> <\/span><\/h2>\n

\u4f7f\u7528 Environment \u65b9\u5f0f\u6765\u83b7\u53d6\u914d\u7f6e\u5c5e\u6027\u503c\u975e\u5e38\u7b80\u5355\uff0c\u53ea\u8981\u6ce8\u5165Environment\u7c7b\u8c03\u7528\u5176\u65b9\u6cd5getProperty(\u5c5e\u6027key)<\/code>\u5373\u53ef\uff0c\u4f46\u77e5\u5176\u7136\u77e5\u5176\u6240\u4ee5\u7136\uff0c\u7b80\u5355\u4e86\u89e3\u4e0b\u5b83\u7684\u539f\u7406\uff0c\u56e0\u4e3a\u540e\u7eed\u7684\u51e0\u79cd\u83b7\u53d6\u914d\u7f6e\u7684\u65b9\u6cd5\u90fd\u548c\u5b83\u606f\u606f\u76f8\u5173\u3002<\/p>\n

<\/span>@Slf<\/span>4j
@SpringBootTest<\/span>
public<\/span> class<\/span> EnvironmentTest<\/span> <\/span>{

    @Resource<\/span>
    private<\/span> Environment env;

    @Test<\/span>
    public<\/span> void<\/span> var1Test<\/span>()<\/span> <\/span>{
        String var1 = env.getProperty(\"env101.var1\"<\/span>);
        log.info(\"Environment \u914d\u7f6e\u83b7\u53d6 {}\"<\/span>, var1);
    }
}
<\/code><\/pre>\n
<\/span>1\u3001\u4ec0\u4e48\u662f Environment\uff1f<\/span><\/h3>\n
Environment \u662f springboot \u6838\u5fc3\u7684\u73af\u5883\u914d\u7f6e\u63a5\u53e3\uff0c\u5b83\u63d0\u4f9b\u4e86\u7b80\u5355\u7684\u65b9\u6cd5\u6765\u8bbf\u95ee\u5e94\u7528\u7a0b\u5e8f\u5c5e\u6027\uff0c\u5305\u62ec\u7cfb\u7edf\u5c5e\u6027\u3001\u64cd\u4f5c\u7cfb\u7edf\u73af\u5883\u53d8\u91cf\u3001\u547d\u4ee4\u884c\u53c2\u6570\u3001\u548c\u5e94\u7528\u7a0b\u5e8f\u914d\u7f6e\u6587\u4ef6\u4e2d\u5b9a\u4e49\u7684\u5c5e\u6027\u7b49\u7b49\u3002<\/p>\n
<\/span>2\u3001\u914d\u7f6e\u521d\u59cb\u5316<\/span><\/h3>\n
Springboot \u7a0b\u5e8f\u542f\u52a8\u52a0\u8f7d\u6d41\u7a0b\u91cc\uff0c\u4f1a\u6267\u884cSpringApplication.run<\/code>\u4e2d\u7684prepareEnvironment()<\/code>\u65b9\u6cd5\u8fdb\u884c\u914d\u7f6e\u7684\u521d\u59cb\u5316\uff0c\u90a3\u521d\u59cb\u5316\u8fc7\u7a0b\u6bcf\u4e00\u6b65\u90fd\u505a\u4e86\u4ec0\u4e48\u5462\uff1f<\/p>\n
<\/span>private<\/span> ConfigurableEnvironment prepareEnvironment<\/span>(SpringApplicationRunListeners listeners,
   DefaultBootstrapContext bootstrapContext, ApplicationArguments applicationArguments)<\/span> <\/span>{
      \/** 
      * 1\u3001\u521b\u5efa ConfigurableEnvironment \u5bf9\u8c61\uff1a\u9996\u5148\u8c03\u7528 getOrCreateEnvironment() \u65b9\u6cd5\u83b7\u53d6\u6216\u521b\u5efa
      * ConfigurableEnvironment \u5bf9\u8c61\uff0c\u8be5\u5bf9\u8c61\u7528\u4e8e\u5b58\u50a8\u73af\u5883\u53c2\u6570\u3002\u5982\u679c\u5df2\u7ecf\u5b58\u5728 ConfigurableEnvironment \u5bf9\u8c61\uff0c\u5219\u76f4\u63a5\u4f7f\u7528\u5b83\uff1b\u5426\u5219\uff0c\u6839\u636e\u7528\u6237\u7684\u914d\u7f6e\u548c\u9ed8\u8ba4\u914d\u7f6e\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u3002
      *\/<\/span>
      ConfigurableEnvironment environment = getOrCreateEnvironment();
      \/**
      * 2\u3001\u89e3\u6790\u5e76\u52a0\u8f7d\u7528\u6237\u6307\u5b9a\u7684\u914d\u7f6e\u6587\u4ef6\uff0c\u5c06\u5176\u4f5c\u4e3a PropertySource \u6dfb\u52a0\u5230\u73af\u5883\u5bf9\u8c61\u4e2d\u3002\u8be5\u65b9\u6cd5\u9ed8\u8ba4\u4f1a\u89e3\u6790 application.properties \u548c application.yml \u6587\u4ef6\uff0c\u5e76\u5c06\u5176\u6dfb\u52a0\u5230 ConfigurableEnvironment \u5bf9\u8c61\u4e2d\u3002
      * PropertySource \u6216 PropertySourcesPlaceholderConfigurer \u52a0\u8f7d\u5e94\u7528\u7a0b\u5e8f\u7684\u5b9a\u5236\u5316\u914d\u7f6e\u3002
      *\/<\/span>
      configureEnvironment(environment, applicationArguments.getSourceArgs());
      \/\/ 3\u3001\u52a0\u8f7d\u6240\u6709\u7684\u7cfb\u7edf\u5c5e\u6027\uff0c\u5e76\u5c06\u5b83\u4eec\u6dfb\u52a0\u5230 ConfigurableEnvironment \u5bf9\u8c61\u4e2d<\/span>
      ConfigurationPropertySources.attach(environment);
      \/\/ 4\u3001\u901a\u77e5\u76d1\u542c\u5668\u73af\u5883\u53c2\u6570\u5df2\u7ecf\u51c6\u5907\u5c31\u7eea<\/span>
      listeners.environmentPrepared(bootstrapContext, environment);
      \/**
      *  5\u3001\u5c06\u9ed8\u8ba4\u7684\u5c5e\u6027\u6e90\u4e2d\u7684\u6240\u6709\u5c5e\u6027\u503c\u79fb\u5230\u73af\u5883\u5bf9\u8c61\u7684\u961f\u5217\u672b\u5c3e\uff0c
      \u8fd9\u6837\u7528\u6237\u81ea\u5b9a\u4e49\u7684\u5c5e\u6027\u503c\u5c31\u53ef\u4ee5\u8986\u76d6\u9ed8\u8ba4\u7684\u5c5e\u6027\u503c\u3002\u8fd9\u662f\u4e3a\u4e86\u907f\u514d\u7528\u6237\u65e0\u610f\u4e2d\u8986\u76d6\u4e86 Spring Boot \u6240\u63d0\u4f9b\u7684\u9ed8\u8ba4\u5c5e\u6027\u3002
      *\/<\/span>
      DefaultPropertiesPropertySource.moveToEnd(environment);
      Assert.state(!environment.containsProperty(\"spring.main.environment-prefix\"<\/span>),
          \"Environment prefix cannot be set via properties.\"<\/span>);
      \/\/ 6\u3001\u5c06 Spring Boot \u5e94\u7528\u7a0b\u5e8f\u7684\u5c5e\u6027\u7ed1\u5b9a\u5230\u73af\u5883\u5bf9\u8c61\u4e0a\uff0c\u4ee5\u4fbf\u80fd\u591f\u6b63\u786e\u5730\u8bfb\u53d6\u548c\u4f7f\u7528\u8fd9\u4e9b\u914d\u7f6e\u5c5e\u6027<\/span>
      bindToSpringApplication(environment);
      \/\/ 7\u3001\u5982\u679c\u6ca1\u6709\u81ea\u5b9a\u4e49\u7684\u73af\u5883\u7c7b\u578b\uff0c\u5219\u4f7f\u7528 EnvironmentConverter \u7c7b\u578b\u5c06\u73af\u5883\u5bf9\u8c61\u8f6c\u6362\u4e3a\u6807\u51c6\u7684\u73af\u5883\u7c7b\u578b\uff0c\u5e76\u6dfb\u52a0\u5230 ConfigurableEnvironment \u5bf9\u8c61\u4e2d\u3002<\/span>
      if<\/span> (!this<\/span>.isCustomEnvironment) {
        EnvironmentConverter environmentConverter = new<\/span> EnvironmentConverter(getClassLoader());
        environment = environmentConverter.convertEnvironmentIfNecessary(environment, deduceEnvironmentClass());
      }
      \/\/ 8\u3001\u518d\u6b21\u52a0\u8f7d\u7cfb\u7edf\u914d\u7f6e\uff0c\u4ee5\u9632\u6b62\u88ab\u5176\u4ed6\u914d\u7f6e\u8986\u76d6<\/span>
      ConfigurationPropertySources.attach(environment);
      return<\/span> environment;
}
<\/code><\/pre>\n
\u770b\u770b\u5b83\u7684\u914d\u7f6e\u52a0\u8f7d\u6d41\u7a0b\u6b65\u9aa4\uff1a<\/p>\n
    \n
  • \n
    \n    \u521b\u5efa \u73af\u5883\u5bf9\u8c61<\/strong> ConfigurableEnvironment<\/code> \u7528\u4e8e\u5b58\u50a8\u73af\u5883\u53c2\u6570\uff1b
    \n   <\/section>\n<\/li>\n
  • \n
    \n    configureEnvironment<\/code> \u65b9\u6cd5\u52a0\u8f7d\u9ed8\u8ba4\u7684 application.properties<\/code> \u548c application.yml<\/code> \u914d\u7f6e\u6587\u4ef6\uff1b\u4ee5\u53ca\u7528\u6237\u6307\u5b9a\u7684\u914d\u7f6e\u6587\u4ef6\uff0c\u5c06\u5176\u5c01\u88c5\u4e3a PropertySource<\/strong> \u6dfb\u52a0\u5230\u73af\u5883\u5bf9\u8c61\u4e2d\uff1b
    \n   <\/section>\n<\/li>\n
  • \n
    \n    attach()<\/code>\uff1a \u52a0\u8f7d\u6240\u6709\u7684\u7cfb\u7edf\u5c5e\u6027\uff0c\u5e76\u5c06\u5b83\u4eec\u6dfb\u52a0\u5230\u73af\u5883\u5bf9\u8c61\u4e2d\uff1b
    \n   <\/section>\n<\/li>\n
  • \n
    \n    listeners.environmentPrepared()<\/code>\uff1a \u53d1\u9001\u73af\u5883\u53c2\u6570\u914d\u7f6e\u5df2\u7ecf\u51c6\u5907\u5c31\u7eea\u7684\u76d1\u542c\u901a\u77e5\uff1b
    \n   <\/section>\n<\/li>\n
  • \n
    \n    moveToEnd()<\/code>\uff1a \u5c06 \u7cfb\u7edf\u9ed8\u8ba4<\/strong> \u7684\u5c5e\u6027\u6e90\u4e2d\u7684\u6240\u6709\u5c5e\u6027\u503c\u79fb\u5230\u73af\u5883\u5bf9\u8c61\u7684\u961f\u5217\u672b\u5c3e\uff0c\u8fd9\u6837\u7528\u6237\u81ea\u5b9a\u4e49\u7684\u5c5e\u6027\u503c\u5c31\u53ef\u4ee5\u8986\u76d6\u9ed8\u8ba4\u7684\u5c5e\u6027\u503c\u3002
    \n   <\/section>\n<\/li>\n
  • \n
    \n    bindToSpringApplication<\/code>\uff1a \u5e94\u7528\u7a0b\u5e8f\u7684\u5c5e\u6027\u7ed1\u5b9a\u5230 Bean \u5bf9\u8c61\u4e0a\uff1b
    \n   <\/section>\n<\/li>\n
  • \n
    \n    attach()<\/code>\uff1a \u518d\u6b21\u52a0\u8f7d\u7cfb\u7edf\u914d\u7f6e\uff0c\u4ee5\u9632\u6b62\u88ab\u5176\u4ed6\u914d\u7f6e\u8986\u76d6\uff1b
    \n   <\/section>\n<\/li>\n<\/ul>\n
    \u4e0a\u8fb9\u7684\u914d\u7f6e\u52a0\u8f7d\u6d41\u7a0b\u4e2d\uff0c\u5404\u79cd\u914d\u7f6e\u5c5e\u6027\u4f1a\u5c01\u88c5\u6210\u4e00\u4e2a\u4e2a\u62bd\u8c61\u7684\u6570\u636e\u7ed3\u6784 PropertySource<\/code>\u4e2d\uff0c\u8fd9\u4e2a\u6570\u636e\u7ed3\u6784\u4ee3\u7801\u683c\u5f0f\u5982\u4e0b\uff0ckey-value\u5f62\u5f0f\u3002<\/p>\n
    <\/span>
    public<\/span> abstract<\/span> class<\/span> PropertySource<\/span><T<\/span>> <\/span>{
        protected<\/span> final<\/span> String name; \/\/ \u5c5e\u6027\u6e90\u540d\u79f0<\/span>
        protected<\/span> final<\/span> T source; \/\/ \u5c5e\u6027\u6e90\u503c\uff08\u4e00\u4e2a\u6cdb\u578b\uff0c\u6bd4\u5982Map\uff0cProperty\uff09<\/span>
        public<\/span> String getName<\/span>()<\/span><\/span>;  \/\/ \u83b7\u53d6\u5c5e\u6027\u6e90\u7684\u540d\u5b57  <\/span>
        public<\/span> T getSource<\/span>()<\/span><\/span>; \/\/ \u83b7\u53d6\u5c5e\u6027\u6e90\u503c  <\/span>
        public<\/span> boolean<\/span> containsProperty<\/span>(String name)<\/span><\/span>;  \/\/\u662f\u5426\u5305\u542b\u67d0\u4e2a\u5c5e\u6027  <\/span>
        public<\/span> abstract<\/span> Object getProperty<\/span>(String name)<\/span><\/span>;   \/\/\u5f97\u5230\u5c5e\u6027\u540d\u5bf9\u5e94\u7684\u5c5e\u6027\u503c   <\/span>
    } 
    <\/code><\/pre>\n
    PropertySource<\/code> \u6709\u8bf8\u591a\u7684\u5b9e\u73b0\u7c7b\u7528\u4e8e\u7ba1\u7406\u5e94\u7528\u7a0b\u5e8f\u7684\u914d\u7f6e\u5c5e\u6027\u3002\u4e0d\u540c\u7684 PropertySource \u5b9e\u73b0\u7c7b\u53ef\u4ee5\u4ece\u4e0d\u540c\u7684\u6765\u6e90\u83b7\u53d6\u914d\u7f6e\u5c5e\u6027\uff0c\u4f8b\u5982\u6587\u4ef6\u3001\u73af\u5883\u53d8\u91cf\u3001\u547d\u4ee4\u884c\u53c2\u6570\u7b49\u3002\u5176\u4e2d\u6d89\u53ca\u5230\u7684\u4e00\u4e9b\u5b9e\u73b0\u7c7b\u6709\uff1a<\/p>\n
    \n