1.查看HDFS下所有的文件或目录 

1 package Hdfs; 2  3 import java.io.IOException; 4 import java.net.URI; 5 import org.apache.hadoop.conf.Configuration; 6 import org.apache.hadoop.fs.FileStatus; 7 import org.apache.hadoop.fs.FileSystem; 8 import org.apache.hadoop.fs.Path; 9 10 public class ListFiles {11     public static void main(String[] args) {12         String uri = "hdfs://neusoft-master:9000/user";13         Configuration conf = new Configuration();14         try {15             FileSystem fs = FileSystem.get(URI.create(uri), conf);16             Path Path = new Path(uri);17             FileStatus[] status = fs.listStatus(Path);18             for (int i = 0; i < status.length; i++) {19                 System.out.println(status[i].getPath().toString());20             }21             fs.close();22         } catch (IOException e) {23             e.printStackTrace();24         }25     }26 }

 

2.提交jar文件并查看结果

[root@neusoft-master hadoop]# hadoop jar /usr/local/software/JarListFiles.jar 

    

3.验证上述结果~