如何使用Heroku&Maven和GitHub托管我的Telegram Bot（Java）？

Question

我的pom.xml文件：

  <modelVersion>4.0.0</modelVersion>
  <groupId>TelegramBOT</groupId>
  <artifactId>TelegramBOT</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <build>
    <sourceDirectory>src</sourceDirectory>
    <plugins>
      <plugin>
        <groupId>com.heroku.sdk</groupId>
        <artifactId>heroku-maven-plugin</artifactId>
        <version>3.0.2</version>
        <configuration>
          <release>13</release>
          <appName>TelegramBOT</appName>
          <processTypes>
          <web>java $JAVA_OPTS -cp target/classes:target/dependency/* Main</web>
          </processTypes>
        </configuration>
      </plugin>
    </plugins>
  </build>
  
  <dependencies>
  <!-- https://mvnrepository.com/artifact/org.telegram/telegrambots -->
<dependency>
    <groupId>org.telegram</groupId>
    <artifactId>telegrambots</artifactId>
    <version>4.9</version>
</dependency>
   
  </dependencies>
</project>

这是pom.xml的构建，但我无法在Heroku中托管...它显示一个错误

       [INFO] -------------------------------------------------------------
       [INFO] ------------------------------------------------------------------------
       [INFO] BUILD FAILURE
       [INFO] ------------------------------------------------------------------------
       [INFO] Total time:  10.182 s
       [INFO] Finished at: 2020-06-28T11:59:51Z
       [INFO] ------------------------------------------------------------------------
       [ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project TelegramBOT: Compilation failure: Compilation failure: 
       [ERROR] /tmp/build_07ca4d72478d669dcc1d1150921b9882/src/com/TelegramBot/EraserHead/GameHandler.java:[17,60] diamond operator is not supported in -source 1.5
       [ERROR]   (use -source 7 or higher to enable diamond operator)
       [ERROR] /tmp/build_07ca4d72478d669dcc1d1150921b9882/src/com/TelegramBot/EraserHead/ImageGuess.java:[23,60] diamond operator is not supported in -source 1.5
       [ERROR]   (use -source 7 or higher to enable diamond operator)
       [ERROR] -> [Help 1]
       [ERROR] 
       [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
       [ERROR] Re-run Maven using the -X switch to enable full debug logging.
       [ERROR] 
       [ERROR] For more information about the errors and possible solutions, please read the following articles:
       [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
 !     ERROR: Failed to build app with Maven
       We're sorry this build is failing! If you can't find the issue in application code,
       please submit a ticket so we can help: https://help.heroku.com/
 !     Push rejected, failed to compile Java app.
 !     Push failed

这是Heroku控制台....

但在Eclipse Console中，它说构建成功！我不知道该怎么做...我真的需要创建Procfile吗？？？请帮帮忙...如果你需要看到我程序的源代码，它就在我的GitHub帐户里:https://GitHub.com/saikat0326/saikat-telegram-bot预先感谢...

Answer 1

看起来Maven编译器插件使用的是Java 5（默认情况下应该使用Java 6)，因此您会得到构建错误Diamond operator is not supported in-Source 1.5

Heroku支持各种Java版本（参见支持的Java版本），您应该可以在POM文件中设置目标版本

<properties>
<maven.compiler.source>1.7</maven.compiler.source>
<maven.compiler.target>1.7</maven.compiler.target>