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