springboot 在1.5版本以後，@ConfigurationProperties去除location引數，因此無法直接匯出yml配置檔案，

而properties配置檔案可以通過@PropertySource或者@ImportResource 來直接匯入，因此整理兩種匯入自定義yml檔案

1、使用YamlPropertiesFactoryBean來載入並設定到PropertySourcesPlaceholderConfigurer中

程式碼：

	@Bean
	public PropertySourcesPlaceholderConfigurer yaml() {
		PropertySourcesPlaceholderConfigurer configurer = new PropertySourcesPlaceholderConfigurer();
		YamlPropertiesFactoryBean yaml = new YamlPropertiesFactoryBean();
		yaml.setResources(new ClassPathResource("myconfig.yml"));
		configurer.setProperties(yaml.getObject());
		return configurer;
	}
 

2、使用@PropertySource，自定義factory

程式碼：

import java.io.IOException;

import org.springframework.boot.env.PropertySourcesLoader;
import org.springframework.core.env.PropertySource;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.EncodedResource;
import org.springframework.core.io.support.PropertySourceFactory;

public class YamlPropertySourceFactory implements PropertySourceFactory {

	@Override
	public PropertySource<?> createPropertySource(String name, EncodedResource resource) throws IOException {
		 return name != null ? new PropertySourcesLoader().load(resource.getResource(), name, null) : new PropertySourcesLoader().load(  
	                resource.getResource(), getNameForResource(resource.getResource()), null); 
	}
	
	private static String getNameForResource(Resource resource) {  
        String name = resource.getDescription();  
        if (!org.springframework.util.StringUtils.hasText(name)) {
            name = resource.getClass().getSimpleName() + "@" + System.identityHashCode(resource);  
        }  
        return name;  
    }  
}