解决 Maven Connection timed out 问题

在国内链接 Maven 官方的中央库会出现Connection timed out问题。 出错提示

[ERROR] Failed to execute goal on project gs-maven: Could not resolve dependencies for project org.springframework:gs-maven:jar:0.1.0: Failed to collect dependencies at joda-time:joda-time:jar:2.2: Failed to read artifact descriptor for joda-time:joda-time:jar:2.2: Could not transfer artifact joda-time:joda-time:pom:2.2 from/to central (https://repo.maven.apache.org/maven2): Connect to repo.maven.apache.org:443 [repo.maven.apache.org/151.101.16.215] failed: Connection timed out: connect -> [Help 1]

解决办法有：

1. 设置代理 能够在.m2/settings.xml中设置proxy.前提是你得有稳定好使的代理.
2. 本身架设或找个镜像站以便连上去 本身架设。。。因为想尽快搞定，不去花这心思了。 在Maven官方镜像介绍的文档里找到个UK的镜像。。。试了下，能用。OK，就是它了。

<mirror>
		<id>UK</id>
		<name>UK Central</name>
		<url>http://uk.maven.org/maven2</url>
		<mirrorOf>central</mirrorOf>
	</mirror>