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("\n");
       }
 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));
 }
 }