HDFS——如何获取文件的属性信息

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可以用bin/hadoop fs -ls 来读取HDFS上的文件属性信息。

也可以采用HDFS的API来读取。如下：

import java.net.URI;import org.apache.hadoop.conf.Configuration;import org.apache.hadoop.fs.FileSystem;import org.apache.hadoop.fs.Path;import org.apache.hadoop.fs.FileStatus;public class FileInfo{ public static void main(String[] args) throws Exception {  if(args.length != 1){   System.out.println("Usage FileInfo <target>");   System.exit(1);  }  Configuration conf = new Configuration();  FileSystem hdfs = FileSystem.get(URI.create(args[0]),conf);  FileStatus fs = hdfs.getFileStatus(new Path(args[0]));  System.out.println("path: "+fs.getPath());  System.out.println("length: "+fs.getLen());  System.out.println("modify time: "+fs.getModificationTime());  System.out.println("owner: "+fs.getOwner());  System.out.println("replication: "+fs.getReplication());  System.out.println("blockSize: "+fs.getBlockSize());  System.out.println("group: "+fs.getGroup());  System.out.println("permission: "+fs.getPermission().toString()); }}

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