HDFS的Java客户端操作代码(查看HDFS下所有的文件或目录)

1.查看HDFS下所有的文件或目录

 package Hdfs;

 import java.io.IOException;
 import java.net.URI;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.FileStatus;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;

 public class ListFiles {
     public static void main(String[] args) {
         String uri = "hdfs://neusoft-master:9000/user";
         Configuration conf = new Configuration();
         try {
             FileSystem fs = FileSystem.get(URI.create(uri), conf);
             Path Path = new Path(uri);
             FileStatus[] status = fs.listStatus(Path);
             for (int i = 0; i < status.length; i++) {
                 System.out.println(status[i].getPath().toString());
             }
             fs.close();
         } catch (IOException e) {
             e.printStackTrace();
         }
     }
 }

查看HDFS下所有的文件

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~