1.combine jc-weibo4j and jc-backup;
2.design varification code;
3.backup as a html file,and locate it in /WEB-INF/weibo_files
4.package html,style files as zip locatte it in /WEB-INF/weibo_files,
named uuid+.zip
5.save zip path in jcUser so that can download without composite weibo
as html again. 
6.use HttpServletResponse to support download function