import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.IOUtils;

/**
 * User: sunriseydy
 * 2018-4-8 15:07
 */
public class WriteFileAndOutputFile {
    public static void main(String[] args) throws Exception {
        if (args.length != 2) {
            System.out.println("Usage: hadoop jar WriteFileAndOutputFileDemo.jar  [HDFS_File_Path] [String]");
            System.exit(-1);
        }
        String path = args[0];
        Configuration conf = new Configuration();
        FileSystem fs = FileSystem.get(conf);
        FSDataOutputStream outputStream = fs.create(new Path(path),true);
        String str = args[1]+"\n";
        outputStream.write(str.getBytes("UTF-8"));
        outputStream.close();
        FSDataInputStream inputStream = null;
        try {
            inputStream = fs.open(new Path(path));
            IOUtils.copyBytes(inputStream, System.out,4096);
        } finally {
            IOUtils.closeStream(inputStream);
        }
    }
}