为什么我二次排序排不了呢？代码如下

[我想飞走]

public class WritableSample  extends Configured implements Tool{

	public static void main(String[] args) throws Exception {
		ToolRunner.run(new WritableSample(), args);

	}

	@Override
	public int run(String[] args) throws Exception {
		Configuration conf = getConf();
		Job job = new Job(conf);
		job.setJarByClass(getClass());
		
		FileSystem fs = FileSystem.get(conf);
		fs.delete(new Path("out"), true);		
		
		FileInputFormat.addInputPath(job, new Path("sample.txt"));
		FileOutputFormat.setOutputPath(job, new Path("out"));
		
		job.setMapperClass(MyWritableMap.class);
		
		job.setOutputKeyClass(MyPairWritable.class);
		job.setOutputValueClass(NullWritable.class);



		job.setSortComparatorClass(PairKeyComparator.class);

		
		job.waitForCompletion(true);
		return 0;
	}


	
	
}




class MyWritableMap extends Mapper<LongWritable, Text, MyPairWritable, NullWritable>{
	MyPairWritable pair= new MyPairWritable();
	protected void map(LongWritable key, Text value, Context context) throws java.io.IOException ,InterruptedException {		
		String[] strs = value.toString().split(" ");
		Text keyy = new Text(strs[0]);
		IntWritable valuee = new IntWritable(Integer.parseInt(strs[1]));
		pair.set(keyy, valuee);
		context.write(pair, NullWritable.get());
		
	};
}

class MyWritableReduce extends Reducer<MyPairWritable, NullWritable,MyPairWritable, NullWritable>{
	protected void reduce(Text key, Iterable<IntWritable> values, Context context) throws java.io.IOException ,InterruptedException {
		
	};
}

class PairKeyComparator extends WritableComparator{

	public  PairKeyComparator() {
		super(MyPairWritable.class,true);
	}
	@Override
	public int compare(WritableComparable a, WritableComparable b) {
		
		MyPairWritable p1 = (MyPairWritable)a;
		MyPairWritable p2 = (MyPairWritable)b;
		System.out.println(p1 + "___" + p2);
		if(p1.getFirst() != p2.getFirst()){
			return p1.first.toString().compareTo(p2.toString());
		}else if(p1.second != p2.getSecond()){
			return p1.second.get() - p2.getSecond().get();
		}
		else	return 0;
	}
	
}

class MyPairPartitioner extends Partitioner<MyPairWritable, NullWritable>{
	public int getPartition(MyPairWritable key, NullWritable value, int numPartitions) {
		if(key.getFirst().toString().startsWith("aaa"))
			return 1;
		if(key.getFirst().toString().startsWith("bbb"))
			return 2;
		if(key.getFirst().toString().startsWith("ccc"))
			return 3;		
		else return 0;
	};
}





class MyPairWritable implements WritableComparable<MyPairWritable>{
	Text first;
	IntWritable second;
	
    public void set(Text first, IntWritable second)
    {
        this.first = first;
        this.second = second;
    }
    public Text getFirst()
    {
        return first;
    }
    public IntWritable getSecond()
    {
        return second;
    }
	
	@Override
	public void readFields(DataInput in) throws IOException {
		// TODO Auto-generated method stub
		first = new Text(in.readUTF());
		second = new IntWritable(in.readInt());
	}

	@Override
	public void write(DataOutput out) throws IOException {
		out.writeUTF(first.toString());
		out.writeInt(second.get());
	}

	@Override
	public int compareTo(MyPairWritable o) {
		if(this.first != o.getFirst()){
			return this.first.toString().compareTo(o.toString());
		}else if(this.second != o.getSecond()){
			return this.second.get() - o.getSecond().get();
		}
		else	return 0;
	}
	
	@Override
	public String toString() {
		// TODO Auto-generated method stub
		return first.toString() + " " + second.get();
	}
}

[u010655270]

是来学习的 经常来看

[u010453530]

来瞅瞅。。。

[fangyinlong]

来学习的！！！

[mapleleaf1314]

来学习的！！！！！

[Logo525]

留学

[qyxqyxqyx]

有c++的开源库吗？并行计算的，hadoop的

[line_us]

观摩高手意见。

[zq_lwl008]

顶，很不错。

[u010669486]

来学下个

[大卫219]

来 学习下！

[薛123]

[u010676832]

尼玛什么更什么啊

[a903669695]

唉！没知识没文化连看都看不懂呀！

[wewonder]

楼主有功率分配和中继位置相关的代码吗？小弟毕业设计急用！

[ftjavayp]

[mbugaifc]

[u010693711]

等我试一下~~~~~~

[naruto2000]

来学习一下

[wn520008]

楼主代码不加注释下次别发上来了。

[大龄下岗程序员]