本代码主要实现的功能是，从磁盘中读取英文文本，然后对文本进行处理，统计单词的个数，最后按个数降序排序。（新手初学，有什么问题还望指正，QQ：767696856）
package com.cute.wordcount; import java.io.BufferedReader; import java.io.FileReader; import java.util.ArrayList; import java.util.Collections; import java.util.Comparator; import java.util.List; import java.util.Map; import java.util.Map.Entry; import java.util.TreeMap; /** * * @author cute * * * 实现从文件中读入英文文章，统计单词个数,并按值从大到小输出 */ public class WordCount { public static void main(String[] args) throws Exception { BufferedReader br = new BufferedReader(new FileReader("F:/test/source.txt")); List<String> lists = new ArrayList<String>(); //存储过滤后单词的列表 String readLine = null; while((readLine = br.readLine()) != null){ String[] wordsArr1 = readLine.split("[^a-zA-Z]"); //过滤出只含有字母的 for (String word : wordsArr1) { if(word.length() != 0){ //去除长度为0的行 lists.add(word); } } } br.close(); Map<String, Integer> wordsCount = new TreeMap<String,Integer>(); //存储单词计数信息，key值为单词，value为单词数 //单词的词频统计 for (String li : lists) { if(wordsCount.get(li) != null){ wordsCount.put(li,wordsCount.get(li) + 1); }else{ wordsCount.put(li,1); } } SortMap(wordsCount); //按值进行排序 } //按value的大小进行排序 public static void SortMap(Map<String,Integer> oldmap){ ArrayList<Map.Entry<String,Integer>> list = new ArrayList<Map.Entry<String,Integer>>(oldmap.entrySet()); Collections.sort(list,new Comparator<Map.Entry<String,Integer>>(){ @Override public int compare(Entry<String, Integer> o1, Entry<String, Integer> o2) { return o2.getValue() - o1.getValue(); //降序 } }); for(int i = 0; i<list.size(); i++){ System.out.println(list.get(i).getKey()+ ": " +list.get(i).getValue()); } } }运行结果：
