Maven org.apache.maven.plugins:maven-resources-plugin:2.6 or one of its dependencies could not be resolved

Solution :

1)Set your proxy settings if any. Set proxy property in Setting.xml in maven Folder. link
2)run mvn --version to check if all paths are correct
3)create new mvn project using command line and build it. if build is successful then is may be cache problem. Delete all folders form .m2 local repository folder and recreate project and let it download all dependencies again. To create new project visit link. To compile run mvn compile in project folder.