hadoop权威指南第四章例4.1的程序该如何运行？

[tian_0322]

// cc StreamCompressor A program to compress data read from standard input and write it to standard output
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.io.IOUtils;
import org.apache.hadoop.io.compress.CompressionCodec;
import org.apache.hadoop.io.compress.CompressionOutputStream;
import org.apache.hadoop.util.ReflectionUtils;

// vv StreamCompressor
public class StreamCompressor {

public static void main(String[] args) throws Exception {
String codecClassname = args[0];
Class<?> codecClass = Class.forName(codecClassname);
Configuration conf = new Configuration();
CompressionCodec codec = (CompressionCodec)
ReflectionUtils.newInstance(codecClass, conf);

CompressionOutputStream out = codec.createOutputStream(System.out);
IOUtils.copyBytes(System.in, out, 4096, false);
out.finish();
}
}
// ^^ StreamCompressor


书上说：echo "Text" | hadoop StreamCompressor org.apach.hadoop.io. compress.Gzipcodec \ | gunzip
有没有具体的步骤，直接运行不行的