23.3 Customizing SpringApplication

如果默认的SpringApplication不符合你的口味，你可以创建一个本地实例（不使用SpringApplication.run 静态方法）并对它进行自定义。例如，想要关闭banner你可以这样写：

public static void main(String[] args) {
    SpringApplication app = new SpringApplication(MySpringConfiguration.class);
    app.setBannerMode(Banner.Mode.OFF);
    app.run(args);
}

传递给SpringApplication的构造器参数将作为spring beans的配置源，多数情况下，它们是一些@Configuration类的引用，但也可能是XML配置（org.springframework.core.io.Resource）或要扫描包（java.lang.Package）的引用。 SpringApplications can read beans from a variety of different sources. It is generally recommended that a single @Configuration class is used to bootstrap your application, however, any of the following sources can also be used:

• Class- A Java class to be loaded by AnnotatedBeanDefinitionReader
• Resource - An XML resource to be loaded by XmlBeanDefinitionReader, or a groovy script to be loaded by GroovyBeanDefinitionReader
• Package - A Java package to be scanned by ClassPathBeanDefinitionScanner
• CharSequence - A class name, resource handle or package name to loaded as appropriate. If the CharSequence cannot be resolved to class and does not resolve to a Resource that exists it will be considered a Package. -----来自(Spring Boot Docs 1.5.7.RELEASE API) - Spring IO

你也可以使用application.properties文件来配置SpringApplication，具体参考24. 外部配置（Externalized Configuration），访问SpringApplication Javadoc可获取完整的配置选项列表。