基于Solr 4.0正式版的IKAnalyzer分词库修改

IKAnalyzer.Java

/** * IK 中文分词 版本 5.0 * IK Analyzer release 5.0 * * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * * 源代码由林良益(linliangyi2005@gmail.com)提供 * 版权声明 2012，乌龙茶工作室 * provided by Linliangyi and copyright 2012 by Oolong studio * */ package org.wltea.analyzer.lucene; import java.io.IOException; import java.io.Reader; import org.apache.lucene.analysis.Analyzer; import org.apache.lucene.analysis.TokenStream; import org.apache.lucene.analysis.Tokenizer; /** * IK分词器，Lucene Analyzer接口实现 兼容Lucene 3.1以上版本 */ public final class IKAnalyzer extends Analyzer { private boolean isMaxWordLength = false; /** * IK分词器Lucene Analyzer接口实现类 默认最细粒度切分算法 */ public IKAnalyzer() { this(false); } /** * IK分词器Lucene Analyzer接口实现类 * * @param isMaxWordLength * 当为true时，分词器进行最大词长切分 */ public IKAnalyzer(boolean isMaxWordLength) { super(); this.setMaxWordLength(isMaxWordLength); } @Override public TokenStreamComponents createComponents(String fieldName, Reader reader) { Tokenizer tokenizer = new IKTokenizer(reader, isMaxWordLength()); return new TokenStreamComponents(tokenizer, null); } public void setMaxWordLength(boolean isMaxWordLength) { this.isMaxWordLength = isMaxWordLength; } public boolean isMaxWordLength() { return isMaxWordLength; } }

IKTokenizer.java

/**
 * IK 中文分词  版本 5.0
 * IK Analyzer release 5.0
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *   
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * 源代码由林良益(linliangyi2005@gmail.com)提供
 * 版权声明 2012，乌龙茶工作室
 * provided by Linliangyi and copyright 2012 by Oolong studio
 *

*
 */
package org.wltea.analyzer.lucene;

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.wltea.analyzer.core.IKSegmenter;
import org.wltea.analyzer.core.Lexeme;

/**
 * IK分词器 Lucene Tokenizer适配器类 兼容Lucene 3.1以上版本
 */
public final class IKTokenizer extends Tokenizer {

// IK分词器实现
 private IKSegmenter _IKImplement;
 // 词元文本属性
 private CharTermAttribute termAtt;
 // 词元位移属性
 private OffsetAttribute offsetAtt;
 // 记录最后一个词元的结束位置
 private int finalOffset;

/**
  * Lucene 3.5 Tokenizer适配器类构造函数
  *
  * @param in
  * @param useSmart
  */
 public IKTokenizer(Reader in, boolean useSmart) {
  super(in);
  offsetAtt = addAttribute(OffsetAttribute.class);
  termAtt = addAttribute(CharTermAttribute.class);
  _IKImplement = new IKSegmenter(in, useSmart);
 }

/*
  * (non-Javadoc)
  *
  * <A class=referer href="https://www.linuxidc.com" target=_blank>@see</A>  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
   finalOffset = nextLexeme.getEndPosition();
   // 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;
 }