基於Lucene3.5.0如何從TokenStream獲得Token

原文地址：http://blog.csdn.net/hiphopmattshi/article/details/7226326
通過學習Lucene3.5.0的doc文檔，對不同release版本 lucene版本的API改動做分析。最後找到了有價值的改動信息。

LUCENE-2302: Deprecated TermAttribute and replaced by a new CharTermAttribute. The change is backwards compatible, so mixed new/old TokenStreams all work on the same char[] buffer independent of which interface they use. CharTermAttribute has shorter method names and implements CharSequence and Appendable. This allows usage like Java's StringBuilder in addition to direct char[] access. Also terms can directly be used in places where CharSequence is allowed (e.g. regular expressions). (Uwe Schindler, Robert Muir)以上信息可以知道，原來的通過的方法已經不能夠提取響應的Token了

StringReader reader = new StringReader(s);
TokenStream ts =analyzer.tokenStream(s, reader);
TermAttribute ta = ts.getAttribute(TermAttribute.class);

通過分析Api文檔信息 可知，CharTermAttribute已經成爲替換TermAttribute的接口因此我編寫了一個例子來更好的從TokenStream中提取Token

package com.segment;

import java.io.StringReader;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.Token;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
import org.apache.lucene.analysis.tokenattributes.TermAttribute;
import org.apache.lucene.util.AttributeImpl;
import org.wltea.analyzer.lucene.IKAnalyzer;


public class Segment {
    public static String show(Analyzer a, String s) throws Exception {

        StringReader reader = new StringReader(s);
        TokenStream ts = a.tokenStream(s, reader);
        String s1 = "", s2 = "";
        boolean hasnext= ts.incrementToken();
        //Token t = ts.next();
        while (hasnext) {
            //AttributeImpl ta = new AttributeImpl();
            CharTermAttribute ta = ts.getAttribute(CharTermAttribute.class);
            //TermAttribute ta = ts.getAttribute(TermAttribute.class);

            s2 = ta.toString() + " ";
            s1 += s2;
            hasnext = ts.incrementToken();
        }
        return s1;
    }

    public String segment(String s) throws Exception {
        Analyzer a = new IKAnalyzer();
        return show(a, s);
    }
    public static void main(String args[])
    {
        String name = "我是俊傑，我愛編程，我的測試用例";
        Segment s = new Segment();
        String test = "";
        try {
            System.out.println(test+s.segment(name));
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

}