Problema ao realizar o comando de gerar projeto | Maven: Build do zero a web

Olá,

Tentei realizar o comando de gerar projeto da seguinte maneira:

mvn archetype:generate -DartifactId=produtos -DgroupId=br.com.alura.maven -DinteractiveMode=false -DarchetypeArtifactId=maven-archetype-quickstart

As variáveis de ambiente JAVA_HOME e PATH estão com os caminhos necessários, mas recebo diversos erros na hora de realizar o download (Já tentei com a versão mais atual do Maven, a 3.5.4, e com a versão usada na aula, 3.3.9, mas ambas apresentam as mesmas mensagens):

[INFO] Scanning for projects...                                                                                                                                         
Downloading: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-clean-plugin/2.5/maven-clean-plugin-2.5.pom                                            
[WARNING] Failed to retrieve plugin descriptor for org.apache.maven.plugins:maven-clean-plugin:2.5: Plugin org.apache.maven.plugins:maven-clean-plugin:2.5 or one of its
 dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-clean-plugin:jar:2.5                                         
Downloading: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-install-plugin/2.4/maven-install-plugin-2.4.pom                                        
[WARNING] Failed to retrieve plugin descriptor for org.apache.maven.plugins:maven-install-plugin:2.4: Plugin org.apache.maven.plugins:maven-install-plugin:2.4 or one of
 its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-install-plugin:jar:2.4                                   
Downloading: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-deploy-plugin/2.7/maven-deploy-plugin-2.7.pom                                          
[WARNING] Failed to retrieve plugin descriptor for org.apache.maven.plugins:maven-deploy-plugin:2.7: Plugin org.apache.maven.plugins:maven-deploy-plugin:2.7 or one of i
ts dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-deploy-plugin:jar:2.7                                      
Downloading: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-site-plugin/3.3/maven-site-plugin-3.3.pom                                              
[WARNING] Failed to retrieve plugin descriptor for org.apache.maven.plugins:maven-site-plugin:3.3: Plugin org.apache.maven.plugins:maven-site-plugin:3.3 or one of its d
ependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-site-plugin:jar:3.3                                            
Downloading: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-antrun-plugin/1.3/maven-antrun-plugin-1.3.pom                                          
[WARNING] Failed to retrieve plugin descriptor for org.apache.maven.plugins:maven-antrun-plugin:1.3: Plugin org.apache.maven.plugins:maven-antrun-plugin:1.3 or one of i
ts dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-antrun-plugin:jar:1.3                                      
Downloading: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-assembly-plugin/2.2-beta-5/maven-assembly-plugin-2.2-beta-5.pom                        
[WARNING] Failed to retrieve plugin descriptor for org.apache.maven.plugins:maven-assembly-plugin:2.2-beta-5: Plugin org.apache.maven.plugins:maven-assembly-plugin:2.2-
beta-5 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-assembly-plugin:jar:2.2-beta-5           
Downloading: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-dependency-plugin/2.8/maven-dependency-plugin-2.8.pom                                  
[WARNING] Failed to retrieve plugin descriptor for org.apache.maven.plugins:maven-dependency-plugin:2.8: Plugin org.apache.maven.plugins:maven-dependency-plugin:2.8 or 
one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-dependency-plugin:jar:2.8

Oi Bruno,

Geralmente esse erro em específico indica que o Maven não conseguiu baixar as dependências na internet.

Provavelmente você deve ter um proxy que utiliza para navegar na internet e o Maven não está configurado para utilizar proxy.

Faça o seguinte, acesse o diretório do maven(Pasta oculta .m2 que fica na pasta do seu usuário) e crie lá um arquivo xml chamado settings.xml com o seguinte conteudo:

<settings>
  <proxies>
   <proxy>
      <id>meu-proxy</id>
      <active>true</active>
      <protocol>http</protocol>
      <host>hostname</host>
      <port>8080</port>
      <username>seuUsuario</username>
      <password>suaSenha</password>
      <nonProxyHosts>www.google.com|*exemplo.com</nonProxyHosts>
    </proxy>
  </proxies>
</settings>

Veja se resolve.