application使用@符合问题：'@' that cannot start any token. (Do not use @ for indentation)

在application配置文件中使用@出现异常：

Exception in thread "main" while scanning for the next token
found character '@' that cannot start any token. (Do not use @ for indentation)
 in 'reader', line 4, column 11:
        name: @project.artifactId@

代码：

info:
  app:
    name: @project.artifactId@
    encoding: @project.build.sourceEncoding@
    java:
      source: @java.version@
      target: @java.version@

解决方案，用单引号或双引号将@@之间的内容包起来：

info:
  app:
    name: "@project.artifactId@"
    encoding: '@project.build.sourceEncoding@'
    java:
      source: '@java.version@'
      target: '@java.version@'