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This article shows you how JAVA API reads and writes HDFS. The content is concise and easy to understand. It will definitely brighten your eyes. I hope you can get something through the detailed introduction of this article.

Package demo;import java.io.IOException;import org.apache.hadoop.conf.Configuration;import org.apache.hadoop.fs.FSDataInputStream;import org.apache.hadoop.fs.FSDataOutputStream;import org.apache.hadoop.fs.FileStatus;import org.apache.hadoop.fs.FileSystem;import org.apache.hadoop.fs.Path;public class PutMerge {public static void main (String [] args) throws IOException {Configuration conf=new Configuration (); FileSystem hdfs=FileSystem.get (conf) FileSystem local=FileSystem.getLocal (conf); / / set the input directory to the output file Path inputDir=new Path (args [0]); Path hdfsFile=new Path (args [1]); / / get a list of local files FileStatus [] inputFiles=local.listStatus (inputDir) / / generate the HDFS output stream FSDataOutputStream out=hdfs.create (hdfsFile); for (int iS0X i0) {out.write (buffer,0,bytesRead);} in.close ();} out.close () }} the above is how JAVA API reads and writes HDFS. Have you learned any knowledge or skills? If you want to learn more skills or enrich your knowledge reserve, you are welcome to follow the industry information channel.

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