详细报错：
Failure to transfer org.apache.maven.plugins:maven-resources-plugin:pom:2.6 from http://10.74.156.84:8085/nexus/content/groups/public/ was cached in the
local repository, resolution will not be reattempted until the update interval of U32_PUBLIC has elapsed or updates are forced. Original error: Could not
transfer artifact org.apache.maven.plugins:maven-resources-plugin:pom:2.6 from/to U32_PUBLIC (http://10.74.156.84:8085/nexus/content/groups/public/):
connect timed out
错误信息出现在pom头的project标签，project标签内容是
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
原因
这是由于缺少maven-resources-plugin-2.6.jar文件。这个文件是在{user.home}\.m2\repository\org\apache\maven\plugins\maven-resources-plugin\下。{user.home}是maven的配置路径，一般是我的文档，是window-preferences-MyEclipse-Maven4MyEclipse-User Setting里面的Local Repository。
解决方案
1、在pom.xml文件中加入maven-resources-plugin配置
<dependency>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-resources-plugin</artifactId>
<version>2.6</version>
</dependency>
2、在命令行下运行mvn install ，如果执行正确应该会在{user.home}\.m2\repository\org\apache\maven\plugins\maven-resources-plugin\下看到maven-resources-plugin-2.6.jar文件
3、刷新工程（右键工程选择刷新项）
4、刷新maven配置，右键工程节点，选择Maven4MyEclipse-Update Project Configuration