HDFS——如何获取文件的属性信息

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());  } }