java8不支持导致的，更新eclipse到4.4.
http://mirrors.ustc.edu.cn/eclipse/technology/epp/downloads/release/luna/R/eclipse-jee-luna-R-win32-x86_64.zip
参考：
http://stackoverflow.com/questions/19137261/java-duplicate-methods-named-xxx-issue-when-using-eclipse-compiler-in-idea-wi
Duplicate methods named spliterator with the parameters () and () are inherited from the types Colle
原文：http://www.cnblogs.com/Colored-Mr/p/5200167.html