MapReduce编程小案例.2nd—求取网站访问次数Top.N_求近1年内高频访问的用户top 10000用户-优快云博客

本文链接：https://blog.youkuaiyun.com/RobertDowneyLm/article/details/80315861

本文通过一个MapReduce编程案例展示了如何求取网站访问次数的Top.N。Mapper类用于处理输入数据，Reducer类则负责聚合信息并覆写cleanup方法。PageCount类封装了网站访问信息，实现了Comparable接口以便于比较。最终通过JobSubmitter类提交任务进行执行。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

MapReduce编程小案例.2nd—求取网站访问次数Top.N

利用MapReduce处理一个小案例，如下是一批网站的访问次数信息：

2018/05/11 qq.com/a
2018/05/11 qq.com/bx
2018/05/11 qq.com/by
2018/05/11 qq.com/by3
2018/05/11 qq.com/news
2018/05/11 sina.com/news/socail
2018/05/11 163.com/ac
2018/05/11 sina.com/news/socail
2018/05/11 163.com/sport
2018/05/11 163.com/ac
2018/05/11 sina.com/play
2018/05/11 163.com/sport
2018/05/11 163.com/ac
2018/05/11 sina.com/movie
2018/05/11 sina.com/play
2018/05/11 sina.com/movie
2018/05/11 163.com/sport
2018/05/11 sina.com/movie
2018/05/11 163.com/ac
2018/05/11 163.com/ac
2018/05/11 163.com/acc
2018/05/11 qq.com/by
2018/05/11 qq.com/by3
2018/05/11 qq.com/news
2018/05/11 163.com/sport
2018/05/11 sina.com/news/socail
2018/05/11 163.com/sport
2018/05/11 sina.com/movie
2018/05/11 sina.com/news/socail
2018/05/11 sina.com/movie
2018/05/11 qq.com/news
2018/05/11 163.com/bb
2018/05/11 163.com/cc
2018/05/11 sina.com/lady/
2018/05/11 163.com/cc
2018/05/11 qq.com/news
2018/05/11 qq.com/by
2018/05/11 qq.com/by3
2018/05/11 sina.com/lady/
2018/05/11 qq.com/by3
2018/05/11 sina.com/lady/
2018/05/11 qq.com/by3
2018/05/11 qq.com/news
2018/05/11 qq.com/by3
2018/05/11 163.com/sport
2018/05/11 163.com/sport
2018/05/11 sina.com/news/socail
2018/05/1