lucene简单例子

包：

lucene-analyzers-3.6.1.jar

lucene-core-3.6.1.jar

lucene-highlighter-3.6.1.jar

lucene-smartcn-3.6.1.jar

 

 

 

package com.nanjing.chaoxing.lucene;

import java.io.File;
import java.io.FileReader;
import java.io.IOException;

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.cn.smart.SmartChineseAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.queryParser.MultiFieldQueryParser;
import org.apache.lucene.queryParser.ParseException;
import org.apache.lucene.queryParser.QueryParser;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.ScoreDoc;
import org.apache.lucene.search.TopDocs;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.FSDirectory;
import org.apache.lucene.util.Version;
import org.junit.Test;

public class LuceneStudy {
        private String dataSourceFile = "D:\\test\\luceneDataSource";
        private File indexFile=new File("D:\\test\\luceneIndex");
        //创建简单中文分析器
        private Analyzer analyzer = new SmartChineseAnalyzer(Version.LUCENE_36,true);
        private String[] queryString={"filepath","content"};
        /**
         * 创建索引
         *
         * @throws IOException
         */
        @Test
        public void createIndex() throws IOException {
            //创建索引目录
            Directory directory = FSDirectory.open(indexFile);
            //建立索引创建类
            IndexWriterConfig indexWriterConfig = new IndexWriterConfig(Version.LUCENE_36, analyzer);
            indexWriterConfig.setOpenMode(IndexWriterConfig.OpenMode.CREATE);  //总是重新创建索引
            IndexWriter writer = new IndexWriter(directory, indexWriterConfig);

            //建立索引
            File[] files = new File(dataSourceFile).listFiles();
            if (files.length > 0) {
                long time1 = System.currentTimeMillis();
                for (int i = 0; i < files.length; i++) {
                    Document document = new Document();
                    document.add(new Field("content", new FileReader(files[i])));
                    document.add(new Field("filepath", files[i].getName(), Field.Store.YES, Field.Index.ANALYZED));
                    writer.addDocument(document);
                }
                long time2 = System.currentTimeMillis();
                System.out.println("创建了" + writer.numDocs() + "索引");
                System.out.println("一共花了" + (time2 - time1) + "时间");
            }

            writer.close();
        }

        /**
         * 搜索文档
         * @throws IOException
         * @throws ParseException
         */
        @Test
        public void search() throws IOException, ParseException {

            IndexReader indexReader = IndexReader.open(FSDirectory.open(indexFile));
            //创建搜索类
            IndexSearcher indexSearcher = new IndexSearcher(indexReader);
            QueryParser queryParser = new MultiFieldQueryParser(Version.LUCENE_36, queryString, analyzer);
            Query query = queryParser.parse("大幅度");
            TopDocs topDocs = indexSearcher.search(query, 10000);
            System.out.println("一共查到:" + topDocs.totalHits + "记录");
            ScoreDoc[] scoreDoc = topDocs.scoreDocs;

            for (int i = 0; i < scoreDoc.length; i++) {
                //内部编号
                int doc = scoreDoc[i].doc;
                System.out.println("内部编号:" + doc);
                //根据文档id找到文档
                Document mydoc = indexSearcher.doc(doc);
                System.out.println("文档路径:" + mydoc.get("filepath"));
            }
        }


    }

http://qq510219366.iteye.com/blog/1673188