java统计一篇文章中单词出现的次数

import java.util.HashMap;

import java.util.Iterator;

 

/**

 * @author Administrator

 * 2011-10-20 9:25

 */

//哈希表计出现次数

public class Has {

  // 统计单词出现的次数

    public static String StatList(String str) {

   StringBuffer sb = new StringBuffer();

   HashMap<String ,Integer> has = new HashMap<String ,Integer> (); // 打开一个哈希表

   String[] slist = str.split("\b");

   for (int i = 0; i < slist.length; i++) {

         if (!has.containsKey(slist[i])) { // 若尚无此单词

                 has.put(slist[i], 1);

         } else {//如果有，就在将次数加1

                 has.put(slist[i],has.get(slist[i])+1 );

        }

     }

//遍历map

     Iterator iterator = has.keySet().iterator();

      while(iterator.hasNext()){

             String word = (String) iterator.next();

             sb.append("单词：").append(word).append(" 次数").append(has.get(word)).append(" ");

      }

return sb.toString();

}

 

public static void main(String[] args) {

        String s = new String("You are the mananger of an office supplies company. A colleague has received a letter compaining about an order for office furniture. She has left the letter for you to answer and has written some notes on it.");

        System.out.println(StatList(s));

}

}