标签：lucene String demo 歌名 new Lucene org apache import

1.导入pom jar文件

<dependency>
            <groupId>org.apache.lucene</groupId>
            <artifactId>lucene-core</artifactId>
            <version>8.11.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.lucene</groupId>
            <artifactId>lucene-queryparser</artifactId>
            <version>8.11.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.lucene</groupId>
            <artifactId>lucene-analyzers-common</artifactId>
            <version>8.11.1</version>
        </dependency>

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>fastjson</artifactId>
    <version>1.2.62</version>
</dependency>

2. 

LuceneService.java类

import com.alibaba.fastjson.JSONObject;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.TextField;
import org.apache.lucene.index.*;
import org.apache.lucene.queryparser.classic.ParseException;
import org.apache.lucene.queryparser.classic.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 java.io.IOException;
import java.nio.file.Paths;
import java.util.List;
import java.util.Set;

public class LuceneService {
    public static void main(String[] args) throws IOException, ParseException {
        String indexDir = "D://temp//lucence_data//products";
        //创建索引
//        createIndex(indexDir);

        //中文搜索不出来
        String jsonDoc = "{\"songName\":\"hello world is chinese\",\"songer\":\"liudehua hk\",\"lyrics\":\"lyricslyricslyricslyrics 2022\"}";
//        String jsonDoc = "{\"aaa\":\"111\"}";
        indexDoc(indexDir,jsonDoc,"chinese");

    }

    //创建索引
    private static void createIndex(String indexDir) throws IOException {
        //准备目录
        Directory dir  = FSDirectory.open(Paths.get(indexDir));
        //准备分词器
        Analyzer analyzer = new StandardAnalyzer();
        //配置
        IndexWriterConfig iwConfig = new IndexWriterConfig(analyzer);
        //创建索引
        IndexWriter iw = new IndexWriter(dir,iwConfig);
        //关闭索引
        iw.close();
    }

    private static void indexDoc(String indexDir,String jsonDoc,String queryStr) throws IOException, ParseException {
        //准备目录
        Directory dir  = FSDirectory.open(Paths.get(indexDir));
        //准备分词器
        Analyzer analyzer = new StandardAnalyzer();
        //配置
        IndexWriterConfig iwConfig = new IndexWriterConfig(analyzer);
        //创建索引
        IndexWriter iw = new IndexWriter(dir,iwConfig);
        //json转document对象
        Document doc = Json2Doc(jsonDoc);
        iw.addDocument(doc);


        //IndexReader实例
        IndexReader ir = DirectoryReader.open(dir);
        IndexSearcher searcher = new IndexSearcher(ir);

        //查询索引
        QueryParser parser = new QueryParser("songName",analyzer);
        Query query = parser.parse(queryStr);

        TopDocs hits = searcher.search(query,10);
        String result = "结果=";
        for (ScoreDoc scoreDoc : hits.scoreDocs){
            //拿到文档
            Document rdoc = searcher.doc(scoreDoc.doc);
            List<IndexableField> fields = rdoc.getFields();
            for (IndexableField f : fields){
                result += f.name() + ":"+f.stringValue()+",\r\n";
            }
            System.out.println("result=" + result);
        }
        System.out.println("总的查询结果result=" + result);
        ir.close();

        //关闭索引
        iw.close();
    }

    /**
     *输出结果
     总的查询结果result=结果=songName:hello world is chinese,
     lyrics:lyricslyricslyricslyrics 2022,
     songer:liudehua hk,
     *
     */

    private static Document Json2Doc(String jsonDoc) {
        Document doc = new Document();
        JSONObject jsonObject = JSONObject.parseObject(jsonDoc);
        Set<String> keys = jsonObject.keySet();
        for (String key : keys){
            doc.add(new TextField(key, jsonObject.getString(key), Field.Store.YES ));
        }
        return doc;
    }



}

 3.本地目录生成的文件

标签：lucene,String,demo,歌名,new,Lucene,org,apache,import
来源： https://www.cnblogs.com/oktokeep/p/16361864.html

本站声明： 1. iCode9 技术分享网（下文简称本站）提供的所有内容，仅供技术学习、探讨和分享；
2. 关于本站的所有留言、评论、转载及引用，纯属内容发起人的个人观点，与本站观点和立场无关；
3. 关于本站的所有言论和文字，纯属内容发起人的个人观点，与本站观点和立场无关；
4. 本站文章均是网友提供，不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属；如您发现该文章侵犯了您的权益，可联系我们第一时间进行删除；
5. 本站为非盈利性的个人网站，所有内容不会用来进行牟利，也不会利用任何形式的广告来间接获益，纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。