import org.springframework.boot.autoconfigure.template.TemplateAvailabilityProvider; //导入依赖的package包/类
@Override
public ConditionOutcome getMatchOutcome(ConditionContext context,
		AnnotatedTypeMetadata metadata) {
	List<TemplateAvailabilityProvider> availabilityProviders = SpringFactoriesLoader
			.loadFactories(TemplateAvailabilityProvider.class,
					context.getClassLoader());

	for (TemplateAvailabilityProvider availabilityProvider : availabilityProviders) {
		if (availabilityProvider.isTemplateAvailable("error",
				context.getEnvironment(), context.getClassLoader(),
				context.getResourceLoader())) {
			return ConditionOutcome.noMatch("Template from "
					+ availabilityProvider + " found for error view");
		}
	}

	return ConditionOutcome.match("No error template view detected");
}
 

import org.springframework.boot.autoconfigure.template.TemplateAvailabilityProvider; //导入依赖的package包/类
private ModelAndView resolve(String viewName, Map<String, Object> model) {
	String errorViewName = "error/" + viewName;
	TemplateAvailabilityProvider provider = this.templateAvailabilityProviders
			.getProvider(errorViewName, this.applicationContext);
	if (provider != null) {
		return new ModelAndView(errorViewName, model);
	}
	return resolveResource(errorViewName, model);
}
 

import org.springframework.boot.autoconfigure.template.TemplateAvailabilityProvider; //导入依赖的package包/类
@Override
public ConditionOutcome getMatchOutcome(ConditionContext context,
		AnnotatedTypeMetadata metadata) {
	TemplateAvailabilityProviders providers = new TemplateAvailabilityProviders(
			context.getClassLoader());
	TemplateAvailabilityProvider provider = providers.getProvider("error",
			context.getEnvironment(), context.getClassLoader(),
			context.getResourceLoader());
	if (provider != null) {
		return ConditionOutcome
				.noMatch("Template from " + provider + " found for error view");
	}
	return ConditionOutcome.match("No error template view detected");
}
 

import org.springframework.boot.autoconfigure.template.TemplateAvailabilityProvider; //导入依赖的package包/类
TestTemplateAvailabilityProviders(TemplateAvailabilityProvider provider) {
	super(Collections.singletonList(provider));
}