@SpringBootApplication

* @author Chris Beams* @since 3.0* @see Configuration* @see ImportSelector* @see ImportResource*/
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface Import {/*** The @{@link Configuration}, {@link ImportSelector} and/or* {@link ImportBeanDefinitionRegistrar} classes to import.*/Class<?>[] value();
}

protected List<String> getCandidateConfigurations(AnnotationMetadata metadata,AnnotationAttributes attributes) {List<String> configurations = SpringFactoriesLoader.loadFactoryNames(getSpringFactoriesLoaderFactoryClass(), getBeanClassLoader());Assert.notEmpty(configurations,"No auto configuration classes found in META-INF/spring.factories. If you "+ "are using a custom packaging, make sure that file is correct.");return configurations;}

public static List<String> loadFactoryNames(Class<?> factoryClass, ClassLoader classLoader) {String factoryClassName = factoryClass.getName();try {Enumeration<URL> urls = (classLoader != null ? classLoader.getResources(FACTORIES_RESOURCE_LOCATION) :ClassLoader.getSystemResources(FACTORIES_RESOURCE_LOCATION));List<String> result = new ArrayList<String>();while (urls.hasMoreElements()) {URL url = urls.nextElement();Properties properties = PropertiesLoaderUtils.loadProperties(new UrlResource(url));String propertyValue = properties.getProperty(factoryClassName);for (String factoryName : StringUtils.commaDelimitedListToStringArray(propertyValue)) {result.add(factoryName.trim());}}return result;}catch (IOException ex) {throw new IllegalArgumentException("Unable to load factories from location [" +FACTORIES_RESOURCE_LOCATION + "]", ex);}}

public static final String FACTORIES_RESOURCE_LOCATION = "META-INF/spring.factories";

@Configuration
@ConditionalOnClass({ Servlet.class, StandardServletMultipartResolver.class,MultipartConfigElement.class })
@ConditionalOnProperty(prefix = "spring.http.multipart", name = "enabled", matchIfMissing = true)
@EnableConfigurationProperties(MultipartProperties.class)

@ConfigurationProperties(prefix = "spring.http.multipart", ignoreUnknownFields = false)
public class MultipartProperties {