import java.io.IOException;


import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.Mapper;
import org.apache.hadoop.mapreduce.Reducer;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
public class Weibo1 {
public static class weiboMap extends Mapper<Object, Text, Text, IntWritable> {
        @Override
        protected void map(Object key, Text value, Context context) throws IOException, InterruptedException {
            String[] strings = value.toString().split("\t");
            if (strings.length == 6) {
                String classname = strings[0];
                int chinese = Integer.parseInt(strings[3]);
                context.write(new Text(classname),new IntWritable(chinese));
            }
        }
    }
    public static class weiboReducer extends Reducer<Text, IntWritable, Text, Text> {


        @Override
        protected void reduce(Text key, Iterable<IntWritable> values, Context context) throws IOException, InterruptedException {
            double jigeCount =0;
            double youxiuCount =0;
            double Count = 0;
            int sum = 0;
            for (IntWritable value : values) {
                Count += Integer.parseInt(value.toString());
                sum++;
                if (Integer.parseInt(value.toString())>=60){
                    jigeCount++;
                }
                if (Integer.parseInt(value.toString())>=80){
                    youxiuCount++;
                }
            }
            double jigelv = jigeCount/sum;


            double youxiulv =youxiuCount/sum;
            double avg = Count/sum;
            context.write(key,new Text(Double.toString(jigelv)+"\t"+Double.toString(youxiulv)+"\t"+Double.toString(avg)));


        }
    }
    public static void main(String[] args) throws IOException, ClassNotFoundException, InterruptedException {
        Job job = Job.getInstance(new Configuration());
        job.setJarByClass(Weibo1.class);
        job.setMapperClass(weiboMap.class);
        job.setReducerClass(weiboReducer.class);
        job.setMapOutputKeyClass(Text.class);
        job.setMapOutputValueClass(IntWritable.class);
        job.setOutputKeyClass(Text.class);
        job.setOutputValueClass(Text.class);
        FileInputFormat.setInputPaths(job,new Path(args[0]));
        FileOutputFormat.setOutputPath(job, new Path(args[1]));
        job.waitForCompletion(true);
    }
}