java NIO ;mvn

http://ifeve.com/java-nio-scattergather/

mvn introduction(install,conf, proxy,plugin,samples)

 http://www.cnblogs.com/dcba1112/archive/2011/05/01/2033805.html

maven3 org.codehaus.plexus.classworlds.launcher.launcher 找不到或无法加载主类---Attention PATH:m2_Home:java_HOME;etc