在Spring Boot中，可以通过@ConfigurationProperties注解来读取自定义的YAML配置文件。首先在application.properties或application.yml文件中配置自定义的YAML文件的路径，例如：
custom: property1: value1 property2: value2然后创建一个Java类来映射这些配置，例如：
import org.springframework.boot.context.properties.ConfigurationProperties;import org.springframework.context.annotation.Configuration;@Configuration@ConfigurationProperties(prefix = "custom")public class CustomProperties { private String property1; private String property2; // getters and setters}在Spring Boot的启动类中引入@EnableConfigurationProperties注解并将 CustomProperties类作为参数传入，例如：
import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;import org.springframework.boot.context.properties.EnableConfigurationProperties;@SpringBootApplication@EnableConfigurationProperties(CustomProperties.class)public class MyApp { public static void main(String[] args) { SpringApplication.run(MyApp.class, args); }}这样就可以在其他组件中注入CustomProperties类，并访问其中的配置属性，例如：
import org.springframework.beans.factory.annotation.Autowired;import org.springframework.web.bind.annotation.GetMapping;import org.springframework.web.bind.annotation.RestController;@RestControllerpublic class MyController { @Autowired private CustomProperties customProperties; @GetMapping("/custom") public String getCustomProperties() { return customProperties.getProperty1() + ", " + customProperties.getProperty2(); }}