1.查看HDFS下所有的文件或目录
1 package Hdfs;查看HDFS下所有的文件
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~
