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solr4的solr-ik插件

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solr4中添加中文分词ik
1.首先从https://code.google.com/p/ik-analyzer/下载IK Analyzer 2012FF_hf1_source.rar打包成jar包,然后放入到solr程序中WEB-INF/lib/下。

2.这样做有一个很不方便的地方就是,每次我们要修改词库,我们都要重新打包,很不方便。所以我就修改了其中的部分源码。在词库更新时,直接更新WEB-INF/classes/ik目录下的文件就成。主要修改的源码为Dictionary.java.

public class Dictionary {
 
 
	/*
	 * 词典单子实例
	 */
	private static Dictionary singleton;
 
	/*
	 * 主词典对象
	 */
	private DictSegment _MainDict;
 
	/*
	 * 停止词词典 
	 */
	private DictSegment _StopWordDict;
	/*
	 * 量词词典
	 */
	private DictSegment _QuantifierDict;
 
	/**
	 * 配置对象
	 */
	private Configuration cfg;
 
	private Dictionary(Configuration cfg){
		this.cfg = cfg;
		this.loadMainDict();
		this.loadStopWordDict();
		this.loadQuantifierDict();
	}
 
	/**
	 * 词典初始化
	 * 由于IK Analyzer的词典采用Dictionary类的静态方法进行词典初始化
	 * 只有当Dictionary类被实际调用时,才会开始载入词典,
	 * 这将延长首次分词操作的时间
	 * 该方法提供了一个在应用加载阶段就初始化字典的手段
	 * @return Dictionary
	 */
	public static Dictionary initial(Configuration cfg){
		if(singleton == null){
			synchronized(Dictionary.class){
				if(singleton == null){
					singleton = new Dictionary(cfg);
					return singleton;
				}
			}
		}
		return singleton;
	}
 
	/**
	 * 获取词典单子实例
	 * @return Dictionary 单例对象
	 */
	public static Dictionary getSingleton(){
		if(singleton == null){
			throw new IllegalStateException("词典尚未初始化,请先调用initial方法");
		}
		return singleton;
	}
 
	/**
	 * 批量加载新词条
	 * @param words Collection<String>词条列表
	 */
	public void addWords(Collection<String> words){
		if(words != null){
			for(String word : words){
				if (word != null) {
					//批量加载词条到主内存词典中
					singleton._MainDict.fillSegment(word.trim().toLowerCase().toCharArray());
				}
			}
		}
	}
 
	/**
	 * 批量移除(屏蔽)词条
	 * @param words
	 */
	public void disableWords(Collection<String> words){
		if(words != null){
			for(String word : words){
				if (word != null) {
					//批量屏蔽词条
					singleton._MainDict.disableSegment(word.trim().toLowerCase().toCharArray());
				}
			}
		}
	}
 
	/**
	 * 检索匹配主词典
	 * @param charArray
	 * @return Hit 匹配结果描述
	 */
	public Hit matchInMainDict(char[] charArray){
		return singleton._MainDict.match(charArray);
	}
 
	/**
	 * 检索匹配主词典
	 * @param charArray
	 * @param begin
	 * @param length
	 * @return Hit 匹配结果描述
	 */
	public Hit matchInMainDict(char[] charArray , int begin, int length){
		return singleton._MainDict.match(charArray, begin, length);
	}
 
	/**
	 * 检索匹配量词词典
	 * @param charArray
	 * @param begin
	 * @param length
	 * @return Hit 匹配结果描述
	 */
	public Hit matchInQuantifierDict(char[] charArray , int begin, int length){
		return singleton._QuantifierDict.match(charArray, begin, length);
	}
 
 
	/**
	 * 从已匹配的Hit中直接取出DictSegment,继续向下匹配
	 * @param charArray
	 * @param currentIndex
	 * @param matchedHit
	 * @return Hit
	 */
	public Hit matchWithHit(char[] charArray , int currentIndex , Hit matchedHit){
		DictSegment ds = matchedHit.getMatchedDictSegment();
		return ds.match(charArray, currentIndex, 1 , matchedHit);
	}
 
 
	/**
	 * 判断是否是停止词
	 * @param charArray
	 * @param begin
	 * @param length
	 * @return boolean
	 */
	public boolean isStopWord(char[] charArray , int begin, int length){			
		return singleton._StopWordDict.match(charArray, begin, length).isMatch();
	}	
 
	/**
	 * 加载主词典及扩展词典
	 */
	private void loadMainDict(){
		//建立一个主词典实例
		_MainDict = new DictSegment((char)0);
		//读取主词典文件
        InputStream is = this.getClass().getClassLoader().getResourceAsStream(cfg.getMainDictionary());
        if(is == null){
        	throw new RuntimeException("Main Dictionary not found!!!");
        }
 
		try {
			BufferedReader br = new BufferedReader(new InputStreamReader(is , "UTF-8"), 512);
			String theWord = null;
			do {
				theWord = br.readLine();
				if (theWord != null && !"".equals(theWord.trim())) {
					_MainDict.fillSegment(theWord.trim().toLowerCase().toCharArray());
				}
			} while (theWord != null);
 
		} catch (IOException ioe) {
			System.err.println("Main Dictionary loading exception.");
			ioe.printStackTrace();
 
		}finally{
			try {
				if(is != null){
                    is.close();
                    is = null;
				}
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		//加载扩展词典
		this.loadExtDict();
	}	
 
	/**
	 * 加载用户配置的扩展词典到主词库表
	 */
	private void loadExtDict(){
		//加载扩展词典配置
		List<String> extDictFiles  = cfg.getExtDictionarys();
		if(extDictFiles != null){
			InputStream is = null;
			for(String extDictName : extDictFiles){
				//读取扩展词典文件
				System.out.println("加载扩展词典:" + extDictName);
				is = this.getClass().getClassLoader().getResourceAsStream(extDictName);
				//如果找不到扩展的字典,则忽略
				if(is == null){
					continue;
				}
				try {
					BufferedReader br = new BufferedReader(new InputStreamReader(is , "UTF-8"), 512);
					String theWord = null;
					do {
						theWord = br.readLine();
						if (theWord != null && !"".equals(theWord.trim())) {
							//加载扩展词典数据到主内存词典中
							//System.out.println(theWord);
							_MainDict.fillSegment(theWord.trim().toLowerCase().toCharArray());
						}
					} while (theWord != null);
 
				} catch (IOException ioe) {
					System.err.println("Extension Dictionary loading exception.");
					ioe.printStackTrace();
 
				}finally{
					try {
						if(is != null){
		                    is.close();
		                    is = null;
						}
					} catch (IOException e) {
						e.printStackTrace();
					}
				}
			}
		}		
	}
 
	/**
	 * 加载用户扩展的停止词词典
	 */
	private void loadStopWordDict(){
		//建立一个主词典实例
		_StopWordDict = new DictSegment((char)0);
		//加载扩展停止词典
		List<String> extStopWordDictFiles  = cfg.getExtStopWordDictionarys();
		if(extStopWordDictFiles != null){
			InputStream is = null;
			for(String extStopWordDictName : extStopWordDictFiles){
				System.out.println("加载扩展停止词典:" + extStopWordDictName);
				//读取扩展词典文件
				is = this.getClass().getClassLoader().getResourceAsStream(extStopWordDictName);
				//如果找不到扩展的字典,则忽略
				if(is == null){
					continue;
				}
				try {
					BufferedReader br = new BufferedReader(new InputStreamReader(is , "UTF-8"), 512);
					String theWord = null;
					do {
						theWord = br.readLine();
						if (theWord != null && !"".equals(theWord.trim())) {
							//System.out.println(theWord);
							//加载扩展停止词典数据到内存中
							_StopWordDict.fillSegment(theWord.trim().toLowerCase().toCharArray());
						}
					} while (theWord != null);
 
				} catch (IOException ioe) {
					System.err.println("Extension Stop word Dictionary loading exception.");
					ioe.printStackTrace();
 
				}finally{
					try {
						if(is != null){
		                    is.close();
		                    is = null;
						}
					} catch (IOException e) {
						e.printStackTrace();
					}
				}
			}
		}		
	}
 
	/**
	 * 加载量词词典
	 */
	private void loadQuantifierDict(){
		//建立一个量词典实例
		_QuantifierDict = new DictSegment((char)0);
		//读取量词词典文件
        InputStream is = this.getClass().getClassLoader().getResourceAsStream(cfg.getQuantifierDicionary());
        if(is == null){
        	throw new RuntimeException("Quantifier Dictionary not found!!!");
        }
		try {
			BufferedReader br = new BufferedReader(new InputStreamReader(is , "UTF-8"), 512);
			String theWord = null;
			do {
				theWord = br.readLine();
				if (theWord != null && !"".equals(theWord.trim())) {
					_QuantifierDict.fillSegment(theWord.trim().toLowerCase().toCharArray());
				}
			} while (theWord != null);
 
		} catch (IOException ioe) {
			System.err.println("Quantifier Dictionary loading exception.");
			ioe.printStackTrace();
 
		}finally{
			try {
				if(is != null){
                    is.close();
                    is = null;
				}
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}
 
}

3.相关程序已经放入到了https://github.com/awnuxkjy/solr-ik

4.使用方法。配置solrhome下的collection1\conf\schema.xml

<fieldType name="ik_text" class="solr.TextField"> 
       <analyzer class="org.wltea.analyzer.lucene.IKAnalyzer" useSmart="true"/> 
</fieldType>

在你的solr程序中/classes文件中新建ik目录,拷贝main2012.dic,ext.dic,IKAnalyzer.cfg.xml,quantifier.dic, stopword.dic等文件。

将ik源码打成jar包。放入到WEB-INF/lib/下

本文固定链接: http://www.chepoo.com/solr4-plugin-solr-ik.html | IT技术精华网

solr4的solr-ik插件:目前有1 条留言

  1. 沙发
    :

    博主是改了哪个地方???

    [回复]

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