HEROKU使用-source 7或更高版本來啟用鑽石操作員

Question

我試圖部署在Java EE平台中構建的應用程序。 當我運行命令git push heroku master ，在部署完成時會生成許多錯誤。

主要的例外是： use -source 7 or higher to enable diamond operator 。

有人對此錯誤有想法嗎？ 波紋管是更多錯誤消息。 謝謝您的幫助。

[ERROR] -> [Help 1]
remote:        [ERROR] 
remote:        [ERROR] To see the full stack trace of the errors, re-run 
Maven with the -e switch.
remote:        [ERROR] Re-run Maven using the -X switch to enable full 
debug logging.
remote:        [ERROR] 
remote:        [ERROR] For more information about the errors and possible 
solutions, please read the following articles:
remote:        [ERROR] [Help 1]                         
http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
remote: 
remote:  !     ERROR: Failed to build app with Maven
remote:        We're sorry this build is failing! If you can't find the 
issue in application code,
remote:        please submit a ticket so we can help: 
https://help.heroku.com/
remote: 
remote:  !     Push rejected, failed to compile Java app.
remote: 
remote:  !     Push failed
remote: Verifying deploy...
remote: 
remote: !   Push rejected to wiidas-jee.

Answer 1

將以下插件和配置添加到pom.xml ：

<plugin>
    <artifactId>maven-compiler-plugin</artifactId>
    <configuration>
      <source>1.8</source>
      <target>1.8</target>
    </configuration>
</plugin>

然后運行：

$ git add pom.xml
$ git commit -m "pom.xml"
$ git push heroku master