今天从github检出maven管理的Mina项目时出现以下问题，写篇文章记录一下，希望能够遇到相同问题的网友，一点帮助。
1.首先从github中找到项目的地址：
https://github.com/apache/mina.git
2.用eclipse检查的Mina的Maven项目时pom.xml文件出现以下问题：
a.
Failure to transfer org.apache.maven.plugins:maven-surefire-plugin:pom:2.12.4
from https://repo.maven.apache.org/maven2 was cached in the local repository,
resolution will not be reattempted until the update interval of central has
elapsed or updates are forced. Original error: Could not transfer artifact
org.apache.maven.plugins:maven-surefire-plugin:pom:2.12.4 from/to central
(https://repo.maven.apache.org/maven2): The operation was cancelled.
问题：无法下载maven-surefire-plugin-2.12.4.jar
b.
CoreException: Could not get the value for parameter compilerId for plugin execution default-compile:
PluginResolutionException: Plugin org.apache.maven.plugins:maven-compiler-plugin:3.1 or
one of its dependencies could not be resolved:
The following artifacts could not be resolved:
com.google.collections
:google-collections:jar:1.0,
junit:junit:jar:3.8.2:
Failure to transfer com.google.collections:google-collections:jar:1.0
from https://repo.maven.apache.org/maven2 was cached in the local repository,
resolution will not be reattempted until the update interval of central has elapsed or
updates are forced. Original error: Could not transfer artifact com.google.collections:
google-collections:jar:1.0 from/to central (https://repo.maven.apache.org/maven2):
The operation was cancelled.
问题：org.apache.maven.plugins:maven-compiler-plugin:3.1依赖无法解决，主要是
com.google.collections:google-collections:jar:1.0,
junit:junit:jar:3.8.2:
这两个包有问题
上面两个问题主要是jar包，自动下载失败的原因，可能网络或其他原因：
解决方式：
1.先删除相应的mvn本地仓库中对应jar包的文件夹的文件；（这个一定要做，里面有记录下载jar失败的本地缓存文件） 2.到maven中心仓库下载相应的jar包（[url]http://search.maven.org/[/url]）; 3.dos下，进入下载jar的目录下： 4.执行以下命令 mvn install:install-file -Dfile=fgoogle-collections-1.0.jar -DgroupId=com.google.collections -DartifactId=google-collections -Dversion=1.0 -Dpackaging=jar mvn install:install-file -Dfile=junit-3.8.2.jar -DgroupId=junit -DartifactId=junit -Dversion=3.8.2 -Dpackaging=jar mvn install:install-file -Dfile=maven-surefire-plugin-2.12.4.jar -DgroupId=org.apache.maven.plugins -DartifactId=maven-surefire-plugin -Dversion=2.12.4 -Dpackaging=jar 注意：这里的groupId，artifactId，到maven仓库中jar的对应的pom.xml中找，这个不能错， 命令的使用，可以查看文章引入链接; 5.更新Maven项目（maven-》update project）。
附：
maven中心仓库地址： http://search.maven.org/