Lucene使用总结

 Lucene使用总结

1、引入Lucene相关的jar， 本实验采用的是如下版本,现在最新的版本为3.0

lucene-core-2.4.0.jar、lucene-analyzers-2.4.0.jar、lucene-highlighter-2.4.0.jar、je-analysis-1.5.3.jar

下载地址：https://olex.openlogic.com/， Maven库：

2、Lucene3.0分为网页抓取、分词器、高亮器、索引库等20几个模块， 具体参考~\lucene-3.0.0\contrib\*

 

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriter.MaxFieldLength;
import org.apache.lucene.queryParser.MultiFieldQueryParser;
import org.apache.lucene.queryParser.QueryParser;
import org.apache.lucene.search.Filter;
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.junit.Test;

import cn.itcast.lucene.utils.File2DocumentUtils;

public class HelloWorld {
    String filePath = "E:\\workspace\\LuceneDemo\\luceneDatasource\\IndexWriter addDocument's a javadoc.txt";

    String indexPath = "E:\\workspace\\LuceneDemo\\luceneIndex";

    Analyzer analyzer = new StandardAnalyzer();

    /**
     * 创建索引
     *
     * IndexWriter 是用来操作（增、删、改）索引库的
     */
    @Test
    public void createIndex() throws Exception {
        // file --> doc
        Document doc = File2DocumentUtils.file2Document(filePath);

        // 建立索引
        IndexWriter indexWriter = new IndexWriter(indexPath, analyzer, true,
                MaxFieldLength.LIMITED);
        indexWriter.addDocument(doc);
        indexWriter.close();
    }

    /**
     * 搜索
     *
     * IndexSearcher 是用来在索引库中进行查询的
     */
    @Test
    public void search() throws Exception {
        // String queryString = "document";
        String queryString = "adddocument";

        // 1，把要搜索的文本解析为 Query
        String[] fields = { "name", "content" };
        QueryParser queryParser = new MultiFieldQueryParser(fields, analyzer);
        Query query = queryParser.parse(queryString);

        // 2，进行查询
        IndexSearcher indexSearcher = new IndexSearcher(indexPath);
        Filter filter = null;
        TopDocs topDocs = indexSearcher.search(query, filter, 10000);
        System.out.println("总共有【" + topDocs.totalHits + "】条匹配结果");

        // 3，打印结果
        for (ScoreDoc scoreDoc : topDocs.scoreDocs) {
            int docSn = scoreDoc.doc; // 文档内部编号
            Document doc = indexSearcher.doc(docSn); // 根据编号取出相应的文档
            File2DocumentUtils.printDocumentInfo(doc); // 打印出文档信息
        }
    }
}

3、更多实例待续......