配置
Mirror
With Repositories you specify from which locations you want to download certain artifacts, such as dependencies and maven-plugins. Repositories can be declared inside a project, which means that if you have your own custom repositories, those sharing your project easily get the right settings out of the box. **However, you may want to use an alternative mirror for a particular repository without changing the project files.但是，您可能希望对特定存储库使用替代镜像而不更改项目文件。
Some reasons to use a mirror are:
使用镜子的一些原因是：
- There is a synchronized mirror on the internet that is geographically closer and faster
网上有一个同步镜像，地理位置更近，速度更快 - You want to replace a particular repository with your own internal repository which you have greater control over
您希望将特定存储库替换为您自己的内部存储库，您可以更好地控制该内部存储库 - You want to run a repository manager to provide a local cache to a mirror and need to use its URL instead
您想要运行存储库管理器来为镜像提供本地缓存，并且需要使用其 URL
To configure a mirror of a given repository, you provide it in your settings file (${user.home}/.m2/settings.xml), giving the new repository its own id and url, and specify the mirrorOf setting that is the ID of the repository you are using a mirror of. For example, the ID of the main Maven Central repository included by default is central, so to use the different mirror instance, you would configure the following:
1. <settings>
2. ...
3. <mirrors>
4. <mirror>
5. <id>other-mirror</id>
6. <name>Other Mirror Repository</name>
7. <url>https://other-mirror.repo.other-company.com/maven2</url>
8. <mirrorOf>central</mirrorOf>
9. </mirror>
10. </mirrors>
11. ...
12. </settings>
Note that there can be at most one mirror for a given repository. In other words, you cannot map a single repository to a group of mirrors that all define the same <mirrorOf> value. Maven will not aggregate the mirrors but simply picks the first match. If you want to provide a combined view of several repositories, use a repository manager instead.
The settings descriptor documentation can be found on the Maven Local Settings Model Website.
Note: The official Maven repository is at https://repo.maven.apache.org/maven2 hosted by the Sonatype Company and is distributed worldwide via CDN.
A list of known mirrors is available in the Repository Metadata. These mirrors may not have the same contents and we don’t support them in any way.
常见问题
问题一：Not a readable JAR artifact
删掉相关的 JAR 包，重新编译。