Java Code Operation HDFS (Create a catalog below/user/root/)

1. Create the HDFs directory and make a jar package

1  PackageHdfs;2 3 Importjava.io.IOException;4 ImportJava.net.URI;5 6 Importorg.apache.hadoop.conf.Configuration;7 ImportOrg.apache.hadoop.fs.FileSystem;8 ImportOrg.apache.hadoop.fs.Path;9 /**Ten * Create an HDFs directory One  * @authorSimonszhao A  * -  */ -  Public classCreatedir { the      Public Static voidMain (string[] args) { -String uri = "Hdfs://neusoft-master:9000/user/root/test1"; -Configuration conf =NewConfiguration (); -         Try { +FileSystem fs =Filesystem.get (Uri.create (URI), conf); -Path DFS =NewPath ("Hdfs://neusoft-master:9000/user/root/test1"); + Fs.mkdirs (DFS); A}Catch(IOException e) { at e.printstacktrace (); -         } -     } -}

Java code create HDFS directory

2. Executing the Master file

[Email protected] hadoop]# Hadoop Jar/usr/local/software/jarcreatedir.jar

3. See if there is a test1 file created in HDFs

[Email protected] hadoop]# Hadoop dfs-ls/user/root/

Java Code Operation HDFS (Create a catalog below/user/root/)