没有Map和Reduce的Mapreduce（LazyMapReduce）
package mapredue.wordcount;import java.io.IOException;import org.apache.hadoop.conf.Configuration;import org.apache.hadoop.fs.Path;import org.apache.hadoop.mapreduce.Job;import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;import org.apache.hadoop.util.GenericOptionsParser;public class LazyMapReduce {public static void main(String args[]) throws IOException,InterruptedException, ClassNotFoundException {Configuration conf = new Configuration();String[] otherArgs = new GenericOptionsParser(conf, args).getRemainingArgs();if (otherArgs.length != 2) {System.exit(2);}Job job = new Job(conf, "LazyMapReduce");FileInputFormat.addInputPath(job, new Path(args[0]));FileOutputFormat.setOutputPath(job, new Path(args[1]));System.exit(job.waitForCompletion(true) ? 0 : 1);}}// 没有map/reduce的MapReduce// 这样也是正常执行的?