Sorting hadoop分区器不工作

我当前收到的错误是：

public static class GroupComparator_2 extends WritableComparator {
                        protected GroupComparator_2() {
                                super(Text.class, true);
                        }


                        @Override
                        public int compare(WritableComparable w1, WritableComparable w2) {
                                Text kw1 = (Text) w1;
                                Text kw2 = (Text) w2;
                                String k1=kw1.toString().split("||")[0].trim();
                                String k2=kw2.toString().split("||")[0].trim();
                                return k1.compareTo(k2);
                        }
                }


public static class KeyComparator_2 extends WritableComparator {

                protected KeyComparator_2() {
                        super(Text.class, true);
                }
                @Override
                public int compare(WritableComparable w1, WritableComparable w2) {
                        Text key1 = (Text) w1;
                        Text key2 = (Text) w2;
                        String kw1_key1=key1.toString().split("||")[0];
                        String kw1_key2=key2.toString().split("||")[0];
                        int cmp=kw1_key1.compareTo(kw1_key2);
                        if(cmp==0){
                                String kw2_key1=key1.toString().split("||")[1].trim();
                                String kw2_key2=key2.toString().split("||")[1].trim();
                                cmp=kw2_key1.compareTo(kw2_key2);
                        }
                        return cmp;
                }
        }

keywordcoccurrence_2.java:92:此处需要接口
公共类分区器_2实现分区器{
^
keywordcoccurrence_2.java:94:method不重写或实现超类型中的方法
@凌驾
^
关键字关键字coccurrence_2.java:147:setPartitionerClass（java.lang.Class
Partitioner
是新的
mapreduce
API（您显然正在使用）中的一个抽象类

因此，您应该将其定义为：

KeywordKeywordCoOccurrence_2.java:92: interface expected here
     public class Partitioner_2 implements Partitioner<Text,Text>{ 
                                                      ^
KeywordKeywordCoOccurrence_2.java:94: method does not override or implement a method from a supertype
        @Override
        ^
KeywordKeywordCoOccurrence_2.java:147: setPartitionerClass(java.lang.Class<? extends org.apache.hadoop.mapreduce.Partitioner>) in org.apache.hadoop.mapreduce.Job cannot be applied to (java.lang.Class<KeywordKeywordCoOccurrence_2.Partitioner_2>)
    job.setPartitionerClass(Partitioner_2.class);

公共类分区器\u 2扩展了分区器{

KeywordKeywordCoOccurrence_2.java:92: interface expected here
     public class Partitioner_2 implements Partitioner<Text,Text>{ 
                                                      ^
KeywordKeywordCoOccurrence_2.java:94: method does not override or implement a method from a supertype
        @Override
        ^
KeywordKeywordCoOccurrence_2.java:147: setPartitionerClass(java.lang.Class<? extends org.apache.hadoop.mapreduce.Partitioner>) in org.apache.hadoop.mapreduce.Job cannot be applied to (java.lang.Class<KeywordKeywordCoOccurrence_2.Partitioner_2>)
    job.setPartitionerClass(Partitioner_2.class);

public class Partitioner_2 extends Partitioner<Text, Text> {