解析Maven的settings.xml文件

一、镜像问题

1、为什么需要配置maven国内镜像？

• 在不配置镜像的情况下,maven默认会使用中央库.--https://repo.maven.apache.org/maven2
• maven中央库在国外,有时候访问会很慢,尤其是下载较大的依赖的时候,有时候速度会很慢,甚至会出现无法下载的情况。
• 为了解决依赖下载速度的问题,需要配置maven国内镜像。

2、配置国内maven镜像（阿里云镜像）

<mirrors>
  <!-- mirror
   | Specifies a repository mirror site to use instead of a given repository. The repository that
   | this mirror serves has an ID that matches the mirrorOf element of this mirror. IDs are used
   | for inheritance and direct lookup purposes, and must be unique across the set of mirrors.
   |
 -->
 <mirror>
    <id>alimaven</id>
    <name>aliyun maven</name>
    <url>http://maven.aliyun.com/nexus/content/groups/public/</url>
    <mirrorOf>central</mirrorOf>
  </mirror>
</mirrors>  

3、OSC MAVEN仓库目前已停止提供服务。

以下地址已访问不了：

http://maven.oschina.net/content/groups/public

http://maven.oschina.net/content/repositories/thirdparty/

<?xml version="1.0"?>
<settings>
<localRepository>D:\repository</localRepository><!--需要改成自己的maven的本地仓库地址-->
    <mirrors>
        <mirror>
            <id>alimaven</id>
            <name>aliyun maven</name>
            <url>http://maven.aliyun.com/nexus/content/groups/public/</url>
            <mirrorOf>central</mirrorOf>
        </mirror>
    </mirrors>
  <profiles>
    <profile>
       <id>nexus</id>
        <repositories>
            <repository>
                <id>nexus</id>
                <name>local private nexus</name>
                <url>http://maven.oschina.net/content/groups/public/</url>
                <releases>
                    <enabled>true</enabled>
                </releases>
                <snapshots>
                    <enabled>false</enabled>
                </snapshots>
            </repository>
        </repositories>  

        <pluginRepositories>
            <pluginRepository>
            <id>nexus</id>
            <name>local private nexus</name>
            <url>http://maven.oschina.net/content/groups/public/</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
            </pluginRepository>
        </pluginRepositories>
    </profile></profiles>
</settings>