Guava系列笔记之集合工具类-MulitM…

import com.google.common.base.Splitter;
import com.google.common.base.Throwables;
import com.google.common.collect.*;

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.Collection;
import java.util.Map;

public class Main {

    public static void main(String[] args) {
        try {
            Multimap,Integer> originWordListMap=LinkedListMultimap.create();
            BufferedReader br=new BufferedReader(new FileReader("src/test.txt"));
            String lineWord=null;
            while ((lineWord=br.readLine())!=null){
                Iterable stringList = Splitter.on("\t").omitEmptyStrings().split(lineWord);
                for (String s : stringList) {
                    originWordListMap.put(s, 1);
                }
            }
            Map, Collection> wordCountMap = originWordListMap.asMap();

            Map, Integer> resultMap = Maps.transformEntries(wordCountMap, new Maps.EntryTransformer, Collection, Integer>() {
                @Override
                public Integer transformEntry(String s, Collection integers) {
                    int count=0;
                    for (Integer integer : integers) {
                        count+=integer;
                    }
                    return count;
                }
            });

            for (Map.Entry, Integer> stringIntegerEntry : resultMap.entrySet()) {
                System.out.println(" key="+stringIntegerEntry.getKey() +" has happend "+stringIntegerEntry.getValue() +" times ");
            }

        } catch (FileNotFoundException e) {
            Throwables.propagate(e);
        } catch (IOException e) {
            Throwables.propagate(e);
        }

    }
}