springboot加载配置文件路径:src下为classpath,src同级目录为file。
@SpringBootApplication @PropertySource(value = {"file:config/application.yml","file:config/application-dev.yml", "file:config/application-pro.yml","file:config/application-pro.yml"}) public class Application { static { System.setProperty("log4j.configurationFile", "file:config/log4j2.xml"); } public static void main(String[] args) { SpringApplicationBuilder builder = new SpringApplicationBuilder(); builder.sources(Application.class);//将读取的所有配置载入SpringApplication中 builder.build().run(args); // SpringApplication.run(Application.class, args); } }
springboot的applition启动时,会扫描配置的包路径下的注解,当注解使用了配置文件中的属性值,那么则要求SpringApplication对象的sources属性必须包含此属性key。
查看SpringApplicationBuilder源码:
public SpringApplication build(String... args) { this.configureAsChildIfNecessary(args); this.application.setSources(this.sources);//spring配置文件参数设置给application对象 return this.application; }
另外main函数中可以写成:
SpringApplication.run(Application.class, args);
SpringApplication源码:
public static ConfigurableApplicationContext run(Object source, String... args) { return run(new Object[]{source}, args); } public static ConfigurableApplicationContext run(Object[] sources, String[] args) { return (new SpringApplication(sources)).run(args); } public static void main(String[] args) throws Exception { run(new Object[0], args); }