137 lines
4.9 KiB
Java
137 lines
4.9 KiB
Java
/*
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* IK 中文分词 版本 8.4.0
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* IK Analyzer release 8.4.0
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* 源代码由林良益(linliangyi2005@gmail.com)提供
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* 版权声明 2012，乌龙茶工作室
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* provided by Linliangyi and copyright 2012 by Oolong studio
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*
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* 8.4.0版本 由 Magese (magese@live.cn) 更新
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* release 8.4.0 update by Magese(magese@live.cn)
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*
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*/
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package org.wltea.analyzer.sample;
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import org.apache.lucene.analysis.Analyzer;
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import org.apache.lucene.document.Document;
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import org.apache.lucene.document.Field;
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import org.apache.lucene.document.StringField;
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import org.apache.lucene.document.TextField;
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import org.apache.lucene.index.DirectoryReader;
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import org.apache.lucene.index.IndexReader;
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import org.apache.lucene.index.IndexWriter;
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import org.apache.lucene.index.IndexWriterConfig;
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import org.apache.lucene.index.IndexWriterConfig.OpenMode;
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import org.apache.lucene.queryparser.classic.ParseException;
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import org.apache.lucene.queryparser.classic.QueryParser;
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import org.apache.lucene.search.*;
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import org.apache.lucene.store.Directory;
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import org.apache.lucene.store.RAMDirectory;
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import org.wltea.analyzer.lucene.IKAnalyzer;
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import java.io.IOException;
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/**
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* 使用IKAnalyzer进行Lucene索引和查询的演示
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* 2012-3-2
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* <p>
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* 以下是结合Lucene4.0 API的写法
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*/
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public class LuceneIndexAndSearchDemo {
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/**
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* 模拟：
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* 创建一个单条记录的索引，并对其进行搜索
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*
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*/
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public static void main(String[] args) {
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//Lucene Document的域名
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String fieldName = "text";
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//检索内容
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String text = "IK Analyzer是一个结合词典分词和文法分词的中文分词开源工具包。它使用了全新的正向迭代最细粒度切分算法。";
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//实例化IKAnalyzer分词器
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Analyzer analyzer = new IKAnalyzer(true);
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Directory directory = null;
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IndexWriter iwriter;
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IndexReader ireader = null;
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IndexSearcher isearcher;
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try {
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//建立内存索引对象
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//noinspection deprecation
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directory = new RAMDirectory();
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//配置IndexWriterConfig
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IndexWriterConfig iwConfig = new IndexWriterConfig(analyzer);
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iwConfig.setOpenMode(OpenMode.CREATE_OR_APPEND);
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iwriter = new IndexWriter(directory, iwConfig);
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//写入索引
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Document doc = new Document();
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doc.add(new StringField("ID", "10000", Field.Store.YES));
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doc.add(new TextField(fieldName, text, Field.Store.YES));
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iwriter.addDocument(doc);
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iwriter.close();
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//搜索过程**********************************
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//实例化搜索器
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ireader = DirectoryReader.open(directory);
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isearcher = new IndexSearcher(ireader);
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String keyword = "中文分词工具包";
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//使用QueryParser查询分析器构造Query对象
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QueryParser qp = new QueryParser(fieldName, analyzer);
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qp.setDefaultOperator(QueryParser.AND_OPERATOR);
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Query query = qp.parse(keyword);
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System.out.println("Query = " + query);
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//搜索相似度最高的5条记录
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TopDocs topDocs = isearcher.search(query, 5);
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long totalHits = topDocs.totalHits.value;
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System.out.println("命中：" + totalHits);
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//输出结果
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ScoreDoc[] scoreDocs = topDocs.scoreDocs;
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for (int i = 0; i < totalHits; i++) {
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Document targetDoc = isearcher.doc(scoreDocs[i].doc);
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System.out.println("内容：" + targetDoc.toString());
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}
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} catch (ParseException | IOException e) {
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e.printStackTrace();
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} finally {
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if (ireader != null) {
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try {
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ireader.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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if (directory != null) {
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try {
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directory.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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}
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}
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