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23 年
java 从hdfs中读取数据,进行groupby 得到avg、count、max,然后用柱状图 ...
题意:从文件、网络或者数据库中读取数据(格式自定、数据自定),显示统计结果(包括图形两种以上),用户界面自定 文件系统:HDFS全名为hadoop Distributed File System,是google File system的开源实现,是一种基于java的应用层文件系统,与hadoop捆绑在一起。
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