IDEA创建SpringBoot项目，application.yml文件没有自动提示

import org.springframework.beans.factory.config.YamlPropertiesFactoryBean;
import org.springframework.core.env.PropertiesPropertySource;
import org.springframework.core.env.PropertySource;
import org.springframework.core.io.support.DefaultPropertySourceFactory;
import org.springframework.core.io.support.EncodedResource;

import java.io.IOException;
import java.util.Properties;

public class YmlConfigFactory  extends DefaultPropertySourceFactory {
    @Override
    public PropertySource<?> createPropertySource(String name, EncodedResource resource) throws IOException {
        String sourceName = name != null ? name : resource.getResource().getFilename();
        if (!resource.getResource().exists()) {
            //不存在就返回一个空的把
            return new PropertiesPropertySource(sourceName, new Properties());
        }
        if (sourceName.endsWith(".yml") || sourceName.endsWith(".yaml")) {
            //yml这里手动加进去
            YamlPropertiesFactoryBean factory = new YamlPropertiesFactoryBean();
            factory.setResources(resource.getResource());
            factory.afterPropertiesSet();
            Properties propertiesFromYaml = factory.getObject();
            return new PropertiesPropertySource(sourceName, propertiesFromYaml);
        }
        return super.createPropertySource(name, resource);
    }
}