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();
        }
    }
}

 

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~