lucene 添删改查代码

package com.xl.lucene;

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.search.*;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.FSDirectory;
import org.apache.lucene.util.Version;
import org.junit.Test;
import org.wltea.analyzer.lucene.IKAnalyzer;

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

public class LuceneManager {
    
    public IndexWriter getIndexWriter() throws Exception {
        
        Directory directory = FSDirectory.open(new File("E:\\WorkSpace\\allOtherItem\\luceneresult"));
        Analyzer analyzer = new StandardAnalyzer();
        IndexWriterConfig config = new IndexWriterConfig(Version.LATEST, analyzer);
        return new IndexWriter(directory, config);
    }
    
    //    全删除
    @Test
    public void testAllDelete() throws Exception {
        IndexWriter indexWriter = getIndexWriter();
        indexWriter.deleteAll();
        indexWriter.close();
    }
    
    //    根据条件
    @Test
    public void testDelete() throws Exception {
        IndexWriter indexWriter = getIndexWriter();
        Query query = new TermQuery(new Term("fileName", "java.txt"));
        indexWriter.deleteDocuments(query);
        indexWriter.close();
    }
    
    //    修改
    @Test
    public void testUpdate() throws Exception {
        IndexWriter indexWriter = getIndexWriter();
        Document document = new Document();
        document.add(new TextField("fileN", "测试文件名", Field.Store.YES));
        document.add(new TextField("fileN", "测试文件内容", Field.Store.NO));
        indexWriter.updateDocument(new Term("fileName", "java.txt"), document, new IKAnalyzer());
        indexWriter.close();
    }
    
    //    indexReader IndexSearcher
    public IndexSearcher getIndexSearcher() throws IOException {
        //查询所有
        Directory directory = FSDirectory.open(new File("E:\\WorkSpace\\allOtherItem\\luceneresult"));
        IndexReader indexReader = DirectoryReader.open(directory);
        IndexSearcher indexSearcher = new IndexSearcher(indexReader);
        return new IndexSearcher(indexReader);
    }
    
    // 执行查询结果
    public void printResult(IndexSearcher indexSearcher,Query query) throws Exception {
        TopDocs topDocs = indexSearcher.search(query, 10);

//        第六步返回查询结果.遍历查询结果并输出
        ScoreDoc[] scoreDocs = topDocs.scoreDocs;
        if (scoreDocs == null) {
            System.out.println("读取失败");
        } else {
            for (ScoreDoc scoreDoc : scoreDocs) {
                int doc = scoreDoc.doc;
                Document document = indexSearcher.doc(doc);
                //文件名称
                String fileName = document.get("fileName");
                //文件内容
                String fileContent = document.get("fileContent");
                //文件大小
                String fileSize = document.get("fileSize");
                //文件路径
                String filePath = document.get("filePath");
                System.out.println(fileName);
                System.out.println(fileContent);
                System.out.println(fileSize);
                System.out.println(filePath);
                System.out.println("------------#----------------------------------------------");
                
            }
        }
    }
    
    //    查询所有
    @Test
    public void testMatchAllDocsQuery() throws Exception {
        IndexSearcher indexSearcher = getIndexSearcher();
        Query query = new MatchAllDocsQuery();
        printResult(indexSearcher,query);
        //关闭资源
        indexSearcher.getIndexReader().close();
    }
    
//    根据数值范围查询
    @Test
    public void testNumbericRangeQuery()throws Exception{
        IndexSearcher indexSearcher = getIndexSearcher();
        Query query =  NumericRangeQuery.newLongRange("fileSize",0L,200L,true,true);//NumericRangeQuery.newLongRange("fileSize",0,200,true,true);
        printResult(indexSearcher,query);
        //关闭资源
        indexSearcher.getIndexReader().close();
    }
    
//    组合查询
    @Test
    public void testBooleanQuery()throws Exception{
        IndexSearcher indexSearcher = getIndexSearcher();
        BooleanQuery booleanQuery = new BooleanQuery();
        Query query1 = new TermQuery(new Term("fileName","java.txt"));
        Query query2 = new TermQuery(new Term("fileContent","good"));
    //Must 是必须有  SHOULD是可以有可以不有   Must_not 是必须没有
        booleanQuery.add(query1, BooleanClause.Occur.SHOULD);
        
        booleanQuery.add(query2, BooleanClause.Occur.SHOULD);
    
        printResult(indexSearcher,booleanQuery);
        //关闭资源
        indexSearcher.getIndexReader().close();
    }
    
}

原文地址：https://www.cnblogs.com/lovetl/p/11897834.html