Spring boot 打成jar之后获取ftl

private static Template getTemplate(String fileName) throws IOException{
    Configuration configuration = new Configuration();
	configuration.setClassForTemplateLoading(当前类.class, "/templates/");
	configuration.setDefaultEncoding("UTF-8");
	return configuration.getTemplate(fileName);
}

此方法可以获取resources/templates 中的ftl模板文件