［JAVA词形还原工具］Snowball

demo:http://snowball.tartarus.org/demo.php

jar download:http://snowball.tartarus.org/download.php (JAVA version里面有一处语法错误，自行修改后，自己动手生成jar包)

 /**
  * Project Name:1008crosslanguage
  * File Name:Stemmer.java
  * Package Name:util
  * Date:Oct 10, 20158:48:09 PM
  * Copyright (c) 2015, [e-mail] All Rights Reserved.
  *
  */
 /**
  * Project Name:1008crosslanguage
  * File Name:Stemmer.java
  * Package Name:util
  * Date:Oct 10, 20158:48:09 PM
  * Copyright (c) 2015, [e-mail] All Rights Reserved.
  *
  */

 package util;

 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;

 import org.tartarus.snowball.ext.englishStemmer;

 /**
  * ClassName:Stemmer <br/>
  * Function: TODO ADD FUNCTION. <br/>
  * Reason: TODO ADD REASON. <br/>
  * Date: Oct 10, 2015 8:48:09 PM <br/>
  *
  * @author xubowen
  * @version
  * @since JDK 1.7
  * @see
  */
 public class Stemmer {

     /**
      * main:(这里用一句话描述这个方法的作用). <br/>
      * TODO(这里描述这个方法适用条件 – 可选).<br/>
      *
      * @author xubowen
      * @param args
      * @since JDK 1.7
      */
     public static String stemString(String str) {
         str = str.toLowerCase();
         englishStemmer stemmer = new englishStemmer();
         stemmer.setCurrent(str);
         if (stemmer.stem()) {
             return stemmer.getCurrent();
         }
         return "";
     }

     public static List<String> stemStrList(List<String> strlist) {
         List<String> strlisttmp = new ArrayList<String>();
         for (String strtmp : strlist) {
             strlisttmp.add(stemString(strtmp));
             // System.out.println(strtmp + " ==> " + stemString(strtmp));
         }
         return strlisttmp;
     }

     public static Map<String, Double> stemStrMap(Map<String, Double> strmap) {
         Map<String, Double> strmaptmp = new HashMap<String, Double>();
         for (Map.Entry<String, Double> entry : strmap.entrySet()) {
             String strtmp = entry.getKey();
             double doubletmp = entry.getValue();
             strmaptmp.put(stemString(strtmp), doubletmp);
             // System.out.println(strtmp + " ==> " + stemString(strtmp));
         }
         return strmaptmp;
     }

     public static void main(String[] args) {
         System.out.println(stemString("caused"));
     }
 }