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Data into the HDFS is written using the FileSystem and OutputStreamWriter Object available in hadoop.fs and java.io package that writes the data as string.
import java.io.*;
import java.util.*;
import java.net.*;
import org.apache.hadoop.fs.*;
import org.apache.hadoop.conf.*;
import org.apache.hadoop.io.*;
import org.apache.hadoop.mapred.*;
import org.apache.hadoop.util.*;
public class writeData {
public static void main(String[] args) throws Exception {
try {
Configuration conf = new Configuration();
Path pt = new Path(“hdfs://localhost:54310/home/WriteData”);
FileSystem fs = pt.getFileSystem(conf);
BufferedWriter br = new BufferedWriter(new OutputStreamWriter(fs.create(pt, true)));
String line;
line = “Welcome to Hadoop MapReduce”;
br.write(line);
br.close();
} catch (Exception e) {
System.out.println(“File not found”);
}
}}
