carga de archivos hdfs y descarga de archivos

import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;

import org.apache.commons.compress.utils.IOUtils;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;


public class DownlandFile {
    
    
	public static void main(String [] args) throws IOException, URISyntaxException {
    
    
			downLoad();//方法一文件下载
			downLoad2();//方法二文件下载
			uploadfile();//文件上传
	}
	
	public static void downLoad() throws IOException, URISyntaxException {
    
    
		FileSystem file = FileSystem.get(new URI("hdfs://Master:9000"),new Configuration());
		file.copyToLocalFile(new Path("/aaa/bbb/ccc/ddd.txt"), new Path("/home/hadoop/Desktop/ddd.txt"));
		file.close();
		
	}
	public static void downLoad2() throws IOException, URISyntaxException {
    
    
		FileSystem file = FileSystem.get(new URI("hdfs://Master:9000"),new Configuration());
		FSDataInputStream fsinput = file.open(new Path("/aaa/bbb/ccc/ddd.txt"));
		FileOutputStream outputstream = new FileOutputStream(("/home/hadoop/Desktop/aaa.txt"));
		IOUtils.copy(fsinput, outputstream);
		IOUtils.closeQuietly(fsinput);
		IOUtils.closeQuietly(outputstream);
		file.close();
	}
	public static void uploadfile() throws IOException, URISyntaxException {
    
    
		FileSystem file = FileSystem.get(new URI("hdfs://Master:9000"),new Configuration());
		file.copyFromLocalFile(new Path("/home/hadoop/Desktop/aaa.txt"), new Path("/user/hadoop"));
		file.close();
	}
	
}