我的软件版本：
异常消息：
Execution default-resources of goal org.apache.maven.plugins:maven-resources-plugin:2.4.3:resources failed: Plugin org.apache.maven.plugins:maven-resources-plugin:2.4.3 or one of its dependencies could not be resolved: Failure to transfer junit:junit:jar:3.8.1 from http://repo1.maven.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 junit:junit:jar:3.8.1 from/to central (http://repo1.maven.org/maven2)**: The operation was cancelled. (org.apache.maven.plugins:maven-resources-plugin:2.4.3:resources:default-resources:process-resources)
但是junit：junit：jar：3.8.1可以通过以下链接找到： http://search.maven.org/#search%7Cga%7C1%7Cg%3A%22junit%22%20AND%20a%3A%22junit%22%20AND%20v%3A%223.8.1%22
没有任何HTTP代理。
我该如何解决这个问题？欢迎任何建议！