正向代理和反向代理
http://blog.csdn.net/m13666368773/article/details/8060481
JNDI（Java 命名与目录接口）
http://shitou521.iteye.com/blog/696006
HTTP协议之multipart/form-data请求分析
https://my.oschina.net/cnlw/blog/168466
文件上传
http://www.voidcn.com/blog/u011638419/article/p-3184075.html
defaultServlet作用
http://www.liuinsect.com/2015/04/11/%E5%85%B3%E4%BA%8Etomcat%E4%B8%ADdefaultservlet%E7%9A%84%E4%BD%9C%E7%94%A8/
tomcat远程调试
http://blog.csdn.net/mhmyqn/article/details/49160339
servlet线程安全问题
http://2277259257.iteye.com/blog/2300209
SpringMVC线程安全问题
http://windows9834.blog.163.com/blog/static/27345004201391045539953/
