Help Center/ MapReduce Service/ Developer Guide (LTS)/ HDFS Development Guide (Security Mode)/ Developing an HDFS Application/ Creating an HDFS Directory
Updated on 2025-04-14 GMT+08:00
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Creating an HDFS Directory

Function

Process of creating a directory:

  1. Call the exists method of the FileSystem instance to check whether the directory exists.
  2. If yes, the method stops.
  3. If no, call the mkdirs method in the FileSystem instance to create a directory.

Example Codes

The following is a code snippet. For complete codes, see the HdfsExampleclass incom.huawei.bigdata.hdfs.examples.

 /**
  * Create a directory. 
  *
  * @throws java.io.IOException
  */
 private void mkdir() throws IOException {
   Path destPath = new Path(DEST_PATH);
   if (!createPath(destPath)) {???LOG.error("failed to create destPath " + DEST_PATH);
   return;
   }

   LOG.info("success to create path " + DEST_PATH);
}

/**
 * create file path
 *
 * @param filePath
 * @return
 * @throws java.io.IOException
 */
private boolean createPath(final Path filePath) throws IOException {
    if (!fSystem.exists(filePath)) {
        fSystem.mkdirs(filePath);
    }
    return true;
}