Lucene 6.0以上版本使用IKAnalyzer分詞器

Lucene 6.0使用IK分詞器需要修改修改IKAnalyzer和IKTokenizer.
使用時先新建一個MyIKTokenizer類,一個MyIkAnalyzer類：
MyIKTokenizer.java

import java.io.IOException;
import java.io.Reader;

import org.apache.lucene.analysis.Tokenizer;
import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
import org.apache.lucene.analysis.tokenattributes.OffsetAttribute;
import org.apache.lucene.analysis.tokenattributes.TypeAttribute;
import org.wltea.analyzer.core.IKSegmenter;
import org.wltea.analyzer.core.Lexeme;

public class MyIKTokenizer extends Tokenizer {
    // IK分詞器實現
    private IKSegmenter _IKImplement;

    // 詞元文本屬性
    private final CharTermAttribute termAtt;
    // 詞元位移屬性
    private final OffsetAttribute offsetAtt;
    // 詞元分類屬性（該屬性分類參考org.wltea.analyzer.core.Lexeme中的分類常量）
    private final TypeAttribute typeAtt;
    // 記錄最後一個詞元的結束位置
    private int endPosition;

    public MyIKTokenizer(Reader in) {
        this(in, false);
    }

    public MyIKTokenizer(Reader in, boolean useSmart) {
        offsetAtt = addAttribute(OffsetAttribute.class);
        termAtt = addAttribute(CharTermAttribute.class);
        typeAtt = addAttribute(TypeAttribute.class);
        _IKImplement = new IKSegmenter(input, useSmart);
    }

    @Override
    public boolean incrementToken() throws IOException {
        // 清除所有的詞元屬性
        clearAttributes();
        Lexeme nextLexeme = _IKImplement.next();
        if (nextLexeme != null) {
            // 將Lexeme轉成Attributes
            // 設置詞元文本
            termAtt.append(nextLexeme.getLexemeText());
            // 設置詞元長度
            termAtt.setLength(nextLexeme.getLength());
            // 設置詞元位移
            offsetAtt.setOffset(nextLexeme.getBeginPosition(),
                    nextLexeme.getEndPosition());
            // 記錄分詞的最後位置
            endPosition = nextLexeme.getEndPosition();
            // 記錄詞元分類
            typeAtt.setType(nextLexeme.getLexemeTypeString());
            // 返會true告知還有下個詞元
            return true;
        }
        // 返會false告知詞元輸出完畢
        return false;
    }

    public void reset() throws IOException {
        super.reset();
        _IKImplement.reset(input);
    }

    @Override
    public final void end() {
        // set final offset
        int finalOffset = correctOffset(this.endPosition);
        offsetAtt.setOffset(finalOffset, finalOffset);
    }

}

MyIkAnalyzer.java

import java.io.Reader;
import java.io.StringReader;

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.util.IOUtils;

public class MyIkAnalyzer extends Analyzer {

    @Override
    protected TokenStreamComponents createComponents(String arg0) {
        Reader reader=null;
        try{
            reader=new StringReader(arg0);
            MyIKTokenizer it = new MyIKTokenizer(reader);
            return new Analyzer.TokenStreamComponents(it);
        }finally {
            IOUtils.closeWhileHandlingException(reader);
        }
    }

}