Hadoop分布式文件系统HDFS访问例程，为Java界面程序，通过IOUtils.copyBytes可将 本地上传文件到HDFS；或从HDFS下载文件到本地硬盘。开发环境为Eclipse。-Hadoop Distributed File System HDFS access routines for Java interface program, through IOUtils.copyBytes can upload files to the local HDFS or downloa

通过Java语言对HDFS进行各种操作，上传、删除、备份等(Through the Java language for HDFS various operations, upload, delete, backup, etc.)