在Eclipse中创建一个Maven项目抱怨“无法解析原型” [英] Create a Maven project in Eclipse complains "Could not resolve archetype"

问题描述

我完全是Maven的新手。
我想用Eclipse Juno EE与原型webapp创建一个Maven项目。我安装了Maven Integration for Eclipse WTP（孵化），我还安装了Maven Integration for Eclipse（在Eclipse Marketplace的已安装选项卡上）。
当我尝试从 File-> New_> Maven Project 创建新的项目时，我获取错误：

 
无法从任何已配置的存储库解析原型org.apache.maven.archetypes：maven-archetype-webapp：RELEASE。 
无法解析工件org.apache.maven.archetypes：maven-archetype-webapp：pom：RELEASE 
无法解析org.apache.maven.archetypes的版本：maven-archetype-webapp：pom： RELEASE：无法在本地（C：\Documents and Settings\PEP35KD\m2\repository）中找到元数据org.apache.maven.archetypes：maven-archetype-webapp / maven-metadata.xml 
无法解析org.apache.maven.archetypes的版本：maven-archetype-webapp：pom：RELEASE：找不到本地的元数据org.apache.maven.archetypes：maven-archetype-webapp / maven-metadata.xml（C ：\Documents and Settings\PEP35KD\.m2\repository）
 

它适用于各种原型。
我正在使用代理，我在C：\Documents和Settings\PEP35KD.m2\下创建文件settings.xml，其中包含：

 <代理> 
<代理> 
< id> myId< / id> 
< active> true< / active> 
< protocol> http< / protocol> 
< username> rete\pep35kd< / username> 
< password> XXXX< / password> 
< host> XXXX< / host> 
< port> 8080< / port> 
< nonProxyHosts> localhost< / nonProxyHosts> 
< / proxy> 
< /代理> 
  

请注意，似乎我无法使用命令行中的mvn命令（命令未找到）。我从来没有安装过Maven，我认为这个插件就够了，这是否是一个正确的假设？

更新问题绝对与代理相关。通过：

• 在本地PC上安装Maven;


• 从Eclipse安装Maven Eclipse
  市场;


• 设置Maven将目录安装到本地PC Maven目录，而不是默认的Embedded Maven，

一切都符合预期。我不明白为什么，但是防火墙可能会阻止Maven服务器的流量。

解决方案

我通过以下解决方案来解决这个问题其他StackOverflow问题

我有同样的问题。我通过将maven原型目录添加到eclipse来修复它。步骤如下：

1. 打开窗口>首选项


2. 打开Maven>原型


3. 点击添加远程目录，并添加以下内容：
   
   
   
   
   • 目录文件： http://repo1.maven.org/maven2/archetype-catalog.xml
   
   
   • 说明：maven目录
   
   

I am totally a newbie with Maven. I want to create a Maven project with Eclipse Juno EE with archetype "webapp". I installed "Maven Integration for Eclipse WTP (incubation)" and I also have installed "Maven Integration for Eclipse" (found it on Installed tab of Eclipse Marketplace). When I try to create new Project from File->New_>Maven Project, I obtain error:

Could not resolve archetype org.apache.maven.archetypes:maven-archetype-webapp:RELEASE from any of the configured repositories.
Could not resolve artifact org.apache.maven.archetypes:maven-archetype-webapp:pom:RELEASE
Failed to resolve version for org.apache.maven.archetypes:maven-archetype-webapp:pom:RELEASE: Could not find metadata org.apache.maven.archetypes:maven-archetype-webapp/maven-metadata.xml in local (C:\Documents and Settings\PEP35KD\.m2\repository)
Failed to resolve version for org.apache.maven.archetypes:maven-archetype-webapp:pom:RELEASE: Could not find metadata org.apache.maven.archetypes:maven-archetype-webapp/maven-metadata.xml in local (C:\Documents and Settings\PEP35KD\.m2\repository)

It happens for all kinds of archetype. I am using a proxy, and I create file settings.xml under C:\Documents and Settings\PEP35KD.m2\ with this content:

<proxies>
    <proxy>
        <id>myId</id>
        <active>true</active>
        <protocol>http</protocol>
        <username>rete\pep35kd</username>
        <password>XXXX</password>
        <host>XXXX</host>
        <port>8080</port>
        <nonProxyHosts>localhost</nonProxyHosts>
    </proxy>
</proxies>

Please, consider that it seems that I cannot use mvn command from command line (command not found). I never installed Maven itself, I thinked that plugin is just enough: is it a correct assumption?

UPDATE Problem is definitely related to proxy. By:

• Installing Maven on local PC;
• Installing Maven Eclipse from Eclipse Market Place;
• Setting Maven Install directory to local PC Maven dir, instead of default Embedded Maven,

everything works as expected. I cannot really understand why, but probably firewall is blocking traffic with Maven servers.

解决方案

I fixed this problem by following the solution to this other StackOverflow question

I had the same problem. I fixed it by adding the maven archetype catalog to eclipse. Steps are provided below:

1. Open Window > Preferences
2. Open Maven > Archetypes
3. Click 'Add Remote Catalog' and add the following:
   • Catalog File: http://repo1.maven.org/maven2/archetype-catalog.xml
   • Description: maven catalog

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