lucene入门-搜索方式

1

package com.home.utils;

import java.util.ArrayList;
import java.util.List;

import org.apache.lucene.document.Document;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.BooleanClause.Occur;
import org.apache.lucene.search.BooleanQuery;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.MatchAllDocsQuery;
import org.apache.lucene.search.NumericRangeQuery;
import org.apache.lucene.search.PhraseQuery;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.ScoreDoc;
import org.apache.lucene.search.TermQuery;
import org.apache.lucene.search.TopDocs;
import org.apache.lucene.search.WildcardQuery;
import org.junit.Test;

/**
 * 1、关键词查询 2、查询所有文档 3、范围查询 4、通配符查询 5、短语查询 6、Boolean查询
 * 
 * @author Administrator
 * 
 */
public class QueryTest {

    private void showData(Query query) throws Exception {
        IndexSearcher indexSearcher = new IndexSearcher(LuceneUtils.directory);
        TopDocs topDocs = indexSearcher.search(query, 25);
        ScoreDoc[] scoreDocs = topDocs.scoreDocs;
        List<Article> articleList = new ArrayList<Article>();
        for (ScoreDoc scoreDoc : scoreDocs) {
            Document document = indexSearcher.doc(scoreDoc.doc);
            Article article = DocumentUtils.document2Article(document);
            articleList.add(article);
        }

        for (Article article : articleList) {
            System.out.println(article.getId());
            System.out.println(article.getTitle());
            System.out.println(article.getContent());
        }
    }

    /**
     * 关键词查询 因为没有分词器，所以区分大小写
     */
    @Test
    public void testTermQuery() throws Exception {
        Term term = new Term("title", "lucene");
        Query query = new TermQuery(term);
        this.showData(query);
    }

    /**
     * 查询所有的文档
     */
    @Test
    public void testAllDocQuery() throws Exception {
        Query query = new MatchAllDocsQuery();
        this.showData(query);
    }

    /**
     * 通配符查询 * 代表任意多个任意字符 ? 任意一个任意字符
     */
    @Test
    public void testWildCartQuery() throws Exception {
        Term term = new Term("title", "*.java");
        Query query = new WildcardQuery(term);
        this.showData(query);
    }

    /**
     * 短语查询 所有的关键词对象必须针对同一个属性
     * 
     * @param query
     * @throws Exception
     */
    @Test
    public void testPharseQuery() throws Exception {
        Term term = new Term("title", "lucene");
        Term term2 = new Term("title", "搜索");
        PhraseQuery query = new PhraseQuery();
        query.add(term);
        query.add(term2, 4);
        this.showData(query);

    }

    /**
     * boolean查询 各种关键词的组合
     * 
     * @param query
     * @throws Exception
     */
    @Test
    public void testBooleanQuery() throws Exception {
        Term term = new Term("title", "北京");
        TermQuery termQuery = new TermQuery(term);
        Term term2 = new Term("title", "美女");
        TermQuery termQuery2 = new TermQuery(term2);
        Term term3 = new Term("title", "北京美女");
        TermQuery termQuery3 = new TermQuery(term3);

        BooleanQuery booleanQuery = new BooleanQuery();
        booleanQuery.add(termQuery, Occur.SHOULD);
        booleanQuery.add(termQuery2, Occur.SHOULD);
        booleanQuery.add(termQuery3, Occur.SHOULD);
        this.showData(booleanQuery);
    }
    
     /**
      * 范围查询
      * @param query
      * @throws Exception
      */
     @Test
     public void testRangeQuery() throws Exception{
      Query query = NumericRangeQuery.newLongRange("id", 5L, 10L, true, true);
      this.showData(query);
     }
     
     
}

原文地址：https://www.cnblogs.com/sharpest/p/5992564.html