How does the bottom layer of the JVM implement synchronization
The difference between Java heap and stack
http://blog.csdn.net/huwei2003/article/details/49101269 zookeeper
http://www.cnblogs.com/linjiqin/archive/2013/05/28/3104016.html
Linux configure java environment variables
http://www.cnblogs.com/samcn/archive/2011/03/16/1986248.html
springmvc handles ajax requests http://www.cnblogs.com/tingbogiu/p/5796199.html