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mySql数据库sql优化：
http://blog.163.com/zhangjie_0303/blog/static/9908270620146951355834/

Oracle数据库Sql优化:
http://www.cnblogs.com/rootq/archive/2008/11/17/1334727.html

mySql列转行：
http://www.cnblogs.com/thomas12112406/p/5813394.html

mySql行转列:
http://blog.163.com/weizi_mm/blog/static/31554420122544629224/

oracle列转行:
http://www.cnblogs.com/Mr_JinRui/archive/2011/05/27/2060109.html

oracle行转列：
http://www.cnblogs.com/nick-huang/p/3836061.html
http://blog.csdn.net/xiaokui_wingfly/article/details/42419207

Spring MVC原理：
http://blog.csdn.net/xtu_xiaoxin/article/details/8796499


servlet生命周期和工作原理：
http://www.cnblogs.com/cuiliang/archive/2011/10/21/2220671.html


spring IOC原理：
http://blog.csdn.net/it_man/article/details/4402245


kafka入门：简介、原理
http://www.cnblogs.com/likehua/p/3999538.html


安装java运行环境:
http://jingyan.baidu.com/article/e75aca85b29c3b142edac6a8.html

eclipse安装：
http://jingyan.baidu.com/article/363872ec38873d6e4aa16f63.html