高版本Lucene的IK分词器

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 IKTokenizer5x extends Tokenizer{ //IK分词器实现 private IKSegmenter _IKImplement; //词元文本属性 private final CharTermAttribute termAtt; //词元位移属性 private final OffsetAttribute offsetAtt; //词元分类属性（该属性分类参考org.wltea.analyzer.core.Lexeme中的分类常量） private final TypeAttribute typeAtt; //记录最后一个词元的结束位置 private int endPosition; /** public IKTokenizer(Reader in , boolean useSmart){ super(in); offsetAtt = addAttribute(OffsetAttribute.class); termAtt = addAttribute(CharTermAttribute.class); typeAtt = addAttribute(TypeAttribute.class); _IKImplement = new IKSegmenter(input , useSmart); }**/ /** * Lucene 5.x Tokenizer适配器类构造函数 * 实现最新的Tokenizer接口 * @param useSmart */ public IKTokenizer5x(boolean useSmart){ super(); offsetAtt = addAttribute(OffsetAttribute.class); termAtt = addAttribute(CharTermAttribute.class); typeAtt = addAttribute(TypeAttribute.class); _IKImplement = new IKSegmenter(input , useSmart); } /* (non-Javadoc) * @see org.apache.lucene.analysis.TokenStream#incrementToken() */ @Override public boolean incrementToken() throws IOException { //清除所有的词元属性 clearAttributes(); Lexeme nextLexeme = _IKImplement.next(); if(nextLexeme != null){ //将Lexeme转成Attributes //设置词元文本 termAtt.append(nextLexeme.getLexemeText()); //设置词元长度 termAtt.setLength(nextLexeme.getLength()); //设置词元位移 offsetAtt.setOffset(nextLexeme.getBeginPosition(), nextLexeme.getEndPosition()); //记录分词的最后位置 endPosition = nextLexeme.getEndPosition(); //记录词元分类 typeAtt.setType(nextLexeme.getLexemeTypeString()); //返会true告知还有下个词元 return true; } //返会false告知词元输出完毕 return false; } /* * (non-Javadoc) * @see org.apache.lucene.analysis.Tokenizer#reset(java.io.Reader) */ @Override 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); } }