这是我用来编写文件的示例代码段 hdfs ```
import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URI;
import java.net.URISyntaxException;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.IOUtils;
import org.apache.hadoop.util.Progressable;

public class WriteFileToHDFS {
public static void main(String[] args) throws IOException, URISyntaxException
{
System.setProperty("hadoop.home.dir", "/");
System.setProperty("HADOOP_USER_NAME", "hdfs");

  //1. Get the instance of COnfiguration
  Configuration configuration = new Configuration();

  //2. Create an InputStream to read the data from local file
  InputStream inputStream = new BufferedInputStream(new FileInputStream("/Users/rabbit/Research/hadoop/sample_files/TAO.mp4"));  

  //3. Get the HDFS instance
  FileSystem hdfs = FileSystem.get(new URI("hdfs://192.168.143.150:9000"), configuration);  

  //4. Open a OutputStream to write the data, this can be obtained from the FileSytem
  OutputStream outputStream = hdfs.create(new Path("hdfs://192.168.143.150:9000/filestore/TAO.mp4"),   
  new Progressable() {  
          @Override
          public void progress() {
            System.out.println("....");
          }
    });
  try
  {
    IOUtils.copyBytes(inputStream, outputStream, 4096, false); 
  }
  finally
  {
    IOUtils.closeStream(inputStream);
    IOUtils.closeStream(outputStream);
  } 

}
}

我希望这是写为 `/data/hadoop-data/dn/current/blk_1073741869` 相反，它被写成 `/data/hadoop-data/dn/current/BP-1308070615-172.22.131.23-1533215887051/current/finalized/subdir0/subdir0/blk_1073741869` . 我不知道在哪里 `BP-1308070615-172.22.131.23-1533215887051/current/finalized/subdir0/subdir0` -这条路生成了吗？
在hadoop中写入数据节点时如何定义路径结构？