多模块项目的 Maven 配置答案

【问题标题】：Maven configuration for Multi Module Project多模块项目的 Maven 配置
【发布时间】：2017-09-21 12:54:39
【问题描述】：

我正在使用 Spring Boot 创建一个多模块项目，该项目将有 3 个模块：moduleA、moduleB 和 moduleC。

我正在关注这个教程https://spring.io/guides/gs/multi-module/#scratch

在根目录中我创建了 3 个目录：moduleA、moduleB 和 moduleC

我已经运行mvn -N io.takari:maven:wrapper

在我运行 sudo ./mvnw 之后，结果如下：

MacBook-Pro-de-calzada:multi-module-project-example nunito$ sudo ./mvnw
/Users/nunito/Development/J2EE/workspace-sts-3.8.4.RELEASE/multi-module-project-example
[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.066 s
[INFO] Finished at: 2017-04-24T20:03:37+02:00
[INFO] Final Memory: 7M/245M
[INFO] ------------------------------------------------------------------------
[ERROR] No goals have been specified for this build. You must specify a valid lifecycle phase or a goal in the format <plugin-prefix>:<goal> or <plugin-group-id>:<plugin-artifact-id>[:<plugin-version>]:<goal>. Available lifecycle phases are: validate, initialize, generate-sources, process-sources, generate-resources, process-resources, compile, process-classes, generate-test-sources, process-test-sources, generate-test-resources, process-test-resources, test-compile, process-test-classes, test, prepare-package, package, pre-integration-test, integration-test, post-integration-test, verify, install, deploy, pre-clean, clean, post-clean, pre-site, site, post-site, site-deploy. -> [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/NoGoalSpecifiedException
MacBook-Pro-de-calzada:multi-module-project-example nunito$

并执行./mvnw clean install

/Users/calzada/Development/J2EE/workspace-sts-3.8.4.RELEASE/multi-module-project-example
[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.062 s
[INFO] Finished at: 2017-04-24T22:38:20+02:00
[INFO] Final Memory: 8M/309M
[INFO] ------------------------------------------------------------------------
[ERROR] The goal you specified requires a project to execute but there is no POM in this directory (/Users/calzada/Development/J2EE/workspace-sts-3.8.4.RELEASE/multi-module-project-example). Please verify you invoked Maven from the correct directory. -> [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/MissingProjectException
MacBook-Pro-de-calzada:multi-module-project-example nunito$

【问题讨论】：

mvn -N io.takari:maven:wrapper 是什么意思？

标签： spring maven spring-mvc spring-boot multi-module

【解决方案1】：

您需要有一个pom.xml 文件才能运行./mvnw clean install。

[错误] 您指定的目标需要执行项目，但此目录中没有 POM (/Users/calzada/Development/J2EE/workspace-sts-3.8.4.RELEASE/multi-module-project-example )。

查看教程中的多模块项目的 Maven 配置和库的 Maven 配置。在那里你会找到必要的pom.xml 文件。

【讨论】：

这是我的想法，但阅读指南后我将实现目标，然后添加 pom.xml 文件

【解决方案2】：

有两件事：

要运行任何 maven 项目，最基本的首要要求是您必须拥有 pom.xml。缺少此文件会引发错误：

[错误] 你指定的目标需要一个项目来执行，但那里此目录中没有 POM （/Users/calzada/Development/J2EE/workspace-sts-3.8.4.RELEASE/multi-module-project-example）。请确认您从正确的目录调用了 Maven。 -> [帮助 1]
教程https://spring.io/guides/gs/multi-module/#scratch中提到你应该有pom.xml文件，请参考本节▶Maven多模块项目配置

【讨论】：