SpringBoot常用配置简介1. SpringBoot中几个常用的配置的简单介绍

• 一个简单的Spring.factories

  [Java] 纯文本查看 复制代码

   # Bootstrap components[/align] org.springframework.cloud.bootstrap.BootstrapConfiguration=\
   org.springframework.cloud.config.server.bootstrap.ConfigServerBootstrapConfiguration
  
   # Application listeners
   org.springframework.context.ApplicationListener=\
   org.springframework.cloud.config.server.bootstrap.ConfigServerBootstrapApplicationListener      
   # Autoconfiguration
   org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
   org.springframework.cloud.config.server.config.EncryptionAutoConfiguration,\
   org.springframework.cloud.config.server.config.SingleEncryptorAutoConfiguration

• BootstrapConfiguration简介
  Spring.factories中的配置项， org.springframework.cloud.bootstrap.BootstrapConfiguration，会在Spring启动之前的准备上下文阶段将其加入到容器中。我们在介绍 @Configuration配置解析一文中曾详细解释Configuration中的解析。BootstrapConfiguration是在刷新（refresh）阶段将class作为预选的配置类@Configuration注入到容器中的，在@Configuration配置解析阶段会解析此class。
• 加载BootstrapConfiguration配置的类
• [Java] 纯文本查看 复制代码

  List<String> names = SpringFactoriesLoader
                  .loadFactoryNames(BootstrapConfiguration.class, classLoader);
          for (String name : StringUtils.commaDelimitedListToStringArray(
                  environment.getProperty("spring.cloud.bootstrap.sources", ""))) {
              names.add(name);
          }
          // TODO: is it possible or sensible to share a ResourceLoader?
          SpringApplicationBuilder builder = new SpringApplicationBuilder()
                  .profiles(environment.getActiveProfiles()).bannerMode(Mode.OFF)
                  .environment(bootstrapEnvironment)
                  .properties("spring.application.name:" + configName)
                  .registerShutdownHook(false).logStartupInfo(false).web(false);
          List<Class<?>> sources = new ArrayList<>();
          for (String name : names) {
              Class<?> cls = ClassUtils.resolveClassName(name, null);
              try {
                  cls.getDeclaredAnnotations();
              }
              catch (Exception e) {
                  continue;
              }
              sources.add(cls);
          }
          builder.sources(sources.toArray(new Class[sources.size()]));
          AnnotationAwareOrderComparator.sort(sources);
          final ConfigurableApplicationContext context = builder.run();

• 加载BootstrapConfiguration配置的类
• [Java] 纯文本查看 复制代码

  private void prepareContext(ConfigurableApplicationContext context,ConfigurableEnvironment environment, SpringApplicationRunListeners listeners,ApplicationArguments applicationArguments, Banner printedBanner) {
          context.setEnvironment(environment);
          postProcessApplicationContext(context);
          applyInitializers(context);
          listeners.contextPrepared(context);
          if (this.logStartupInfo) {
              logStartupInfo(context.getParent() == null);
              logStartupProfileInfo(context);
          }
      // Add boot specific singleton beans
          context.getBeanFactory().registerSingleton("springApplicationArguments",
                  applicationArguments);
          if (printedBanner != null) {
              context.getBeanFactory().registerSingleton("springBootBanner", printedBanner);
          }
  
          // Load the sources
          Set<Object> sources = getSources();//获取需要加载的class源
          Assert.notEmpty(sources, "Sources must not be empty");
          load(context, sources.toArray(new Object[sources.size()]));//加载class
          listeners.contextLoaded(context);
        }

• ApplicationListener简介
  org.springframework.context.ApplicationListener会在SpringBoot中几个典型事件产生后调用onApplicationEvent方法。详见Spring事件发布系统。
• Autoconfiguration简介
  org.springframework.boot.autoconfigure.EnableAutoConfiguration是SpringBoot中最常见配置，用于自动配置。只要有@EnableAutoConfiguration注解，该配置的所有类都会自动加载到Spring容器中。
  
  没有智能的代码，源码面前了无秘密
  

转载：http://www.cnblogs.com/dragonfei ... utm_medium=referral

SpringBoot常用配置简介1. SpringBoot中几个常用的配置的简单介绍

• 一个简单的Spring.factories

  [Java] 纯文本查看 复制代码

   # Bootstrap components[/align] org.springframework.cloud.bootstrap.BootstrapConfiguration=\
   org.springframework.cloud.config.server.bootstrap.ConfigServerBootstrapConfiguration
  
   # Application listeners
   org.springframework.context.ApplicationListener=\
   org.springframework.cloud.config.server.bootstrap.ConfigServerBootstrapApplicationListener      
   # Autoconfiguration
   org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
   org.springframework.cloud.config.server.config.EncryptionAutoConfiguration,\
   org.springframework.cloud.config.server.config.SingleEncryptorAutoConfiguration

• BootstrapConfiguration简介
  Spring.factories中的配置项， org.springframework.cloud.bootstrap.BootstrapConfiguration，会在Spring启动之前的准备上下文阶段将其加入到容器中。我们在介绍 @Configuration配置解析一文中曾详细解释Configuration中的解析。BootstrapConfiguration是在刷新（refresh）阶段将class作为预选的配置类@Configuration注入到容器中的，在@Configuration配置解析阶段会解析此class。
• 加载BootstrapConfiguration配置的类
• [Java] 纯文本查看 复制代码

  List<String> names = SpringFactoriesLoader
                  .loadFactoryNames(BootstrapConfiguration.class, classLoader);
          for (String name : StringUtils.commaDelimitedListToStringArray(
                  environment.getProperty("spring.cloud.bootstrap.sources", ""))) {
              names.add(name);
          }
          // TODO: is it possible or sensible to share a ResourceLoader?
          SpringApplicationBuilder builder = new SpringApplicationBuilder()
                  .profiles(environment.getActiveProfiles()).bannerMode(Mode.OFF)
                  .environment(bootstrapEnvironment)
                  .properties("spring.application.name:" + configName)
                  .registerShutdownHook(false).logStartupInfo(false).web(false);
          List<Class<?>> sources = new ArrayList<>();
          for (String name : names) {
              Class<?> cls = ClassUtils.resolveClassName(name, null);
              try {
                  cls.getDeclaredAnnotations();
              }
              catch (Exception e) {
                  continue;
              }
              sources.add(cls);
          }
          builder.sources(sources.toArray(new Class[sources.size()]));
          AnnotationAwareOrderComparator.sort(sources);
          final ConfigurableApplicationContext context = builder.run();

• 加载BootstrapConfiguration配置的类
• [Java] 纯文本查看 复制代码

  private void prepareContext(ConfigurableApplicationContext context,ConfigurableEnvironment environment, SpringApplicationRunListeners listeners,ApplicationArguments applicationArguments, Banner printedBanner) {
          context.setEnvironment(environment);
          postProcessApplicationContext(context);
          applyInitializers(context);
          listeners.contextPrepared(context);
          if (this.logStartupInfo) {
              logStartupInfo(context.getParent() == null);
              logStartupProfileInfo(context);
          }
      // Add boot specific singleton beans
          context.getBeanFactory().registerSingleton("springApplicationArguments",
                  applicationArguments);
          if (printedBanner != null) {
              context.getBeanFactory().registerSingleton("springBootBanner", printedBanner);
          }
  
          // Load the sources
          Set<Object> sources = getSources();//获取需要加载的class源
          Assert.notEmpty(sources, "Sources must not be empty");
          load(context, sources.toArray(new Object[sources.size()]));//加载class
          listeners.contextLoaded(context);
        }

• ApplicationListener简介
  org.springframework.context.ApplicationListener会在SpringBoot中几个典型事件产生后调用onApplicationEvent方法。详见Spring事件发布系统。
• Autoconfiguration简介
  org.springframework.boot.autoconfigure.EnableAutoConfiguration是SpringBoot中最常见配置，用于自动配置。只要有@EnableAutoConfiguration注解，该配置的所有类都会自动加载到Spring容器中。
  
  没有智能的代码，源码面前了无秘密
  

转载：http://www.cnblogs.com/dragonfei ... utm_medium=referral