package Hdfs;

 import java.net.URI;

 import org.apache.hadoop.conf.Configuration;

 import org.apache.hadoop.fs.BlockLocation;

 import org.apache.hadoop.fs.FileStatus;

 import org.apache.hadoop.fs.FileSystem;

 import org.apache.hadoop.fs.Path;

 public class LocationFile {

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

         String uri = "hdfs://neusoft-master:9000/user/root/test/demo1";

         Configuration conf = new Configuration();

         try {

             FileSystem fs = FileSystem.get(URI.create(uri), conf);

             Path fpath = new Path(uri);

             FileStatus fileStatus = fs.getFileStatus(fpath);

             BlockLocation[] blockLocations = fs.getFileBlockLocations(

                     fileStatus, 0, fileStatus.getLen());

             int blocklen = blockLocations.length;

             for (int i = 0; i < blocklen; i++) {

                 String[] hosts = blockLocations[i].getHosts();

                 System.out.println("block_" +i+ "_location:" + hosts[0]);

             }

         } catch (Exception e) {

             e.printStackTrace();

         }

     }

 }