package com.hdfs;

 import org.apache.hadoop.conf.Configuration;

 import org.apache.hadoop.fs.FSDataInputStream;

 import org.apache.hadoop.fs.FSDataOutputStream;

 import org.apache.hadoop.fs.FileStatus;

 import org.apache.hadoop.fs.FileSystem;

 import org.apache.hadoop.fs.FileUtil;

 import org.apache.hadoop.fs.FsUrlStreamHandlerFactory;

 import org.apache.hadoop.fs.Path;

 import org.apache.hadoop.io.IOUtils;

 import org.apache.hadoop.util.Progressable;

 public class HdfsTest1 {

     //显示文件所有信息

     public static void fileInfo(String path) throws IOException{

         Configuration conf = new Configuration();

         FileSystem fs = FileSystem.get(conf);

         Path p = new Path(path);

         //FileStatus对象封装了文件的和目录的额元数据，包括文件长度、块大小、权限等信息

         FileStatus fileStatus = fs.getFileStatus(p);

         System.out.println("文件路径："+fileStatus.getPath());

         System.out.println("块的大小："+fileStatus.getBlockSize());

         System.out.println("文件所有者："+fileStatus.getOwner()+":"+fileStatus.getGroup());

         System.out.println("文件权限："+fileStatus.getPermission());

         System.out.println("文件长度："+fileStatus.getLen());

         System.out.println("备份数："+fileStatus.getReplication());

         System.out.println("修改时间："+fileStatus.getModificationTime());

     }

     public static void main(String[] args) throws IOException {

         fileInfo("/user/hadoop/aa.mp4");

     }

 }