SpringBoot整合FreeMarker 报错 FTL stack trace ("~" means nesting-related): - Failed at: ${ctx}

解决： 在application.yml配置文件 中加上classic_compatible配置
 #    freemarker
freemarker:
  suffix: .ftl
  content-type: text/html
  charset: UTF-8
  template-loader-path: classpath:/views/
  settings:
    classic_compatible: true