利用MapperReducer的链式编程进行单词统计和过滤敏感词

Map Mapper1

import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Mapper;

import java.io.IOException;

/**
 * Created by 张倩 on 2017/3/18.
 */
public class WCMapMapper1 extends Mapper<LongWritable,Text,Text,IntWritable>{
    protected void map(LongWritable key, Text value, Context context) throws IOException, InterruptedException {
       Text keyOut = new Text();
       IntWritable valueOut =  new IntWritable();
        String[] arr = value.toString().split(" ");
       for(String s : arr){
           keyOut.set(s);
           valueOut.set(1);
           context.write(keyOut,valueOut);

       }

    }
}

Mapper1是进行 单词分割 阶段

MapMapper2

import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapre