无法解析导入org.apache.lucene.queryparser

Question

我正在使用Lucene 6.6，我在导入lucene.queryparser时遇到了困难，并且我没有检查lucene文档，现在它不存在。 我正在使用下面的代码。对于lucene6中的queryparser，有没有其他选择？

import java.io.IOException; 
import java.text.ParseException; 

import org.apache.lucene.analysis.standard.StandardAnalyzer; 
import org.apache.lucene.document.Document; 
import org.apache.lucene.document.Field; 
import org.apache.lucene.document.StringField; 
import org.apache.lucene.document.TextField; 
import org.apache.lucene.index.DirectoryReader; 
import org.apache.lucene.index.IndexReader; 
import org.apache.lucene.index.IndexWriter; 
import org.apache.lucene.index.IndexWriterConfig; 

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.TopScoreDocCollector; 
import org.apache.lucene.store.Directory; 
import org.apache.lucene.store.RAMDirectory; 
import org.apache.lucene.util.Version; 

public class HelloLucene { 

    public static void main(String[] args) throws IOException, ParseException { 
     // 0. Specify the analyzer for tokenizing text. 
     // The same analyzer should be used for indexing and searching 
     StandardAnalyzer analyzer = new StandardAnalyzer(); 

     // 1. create the index 
     Directory index = new RAMDirectory(); 

     IndexWriterConfig config = new IndexWriterConfig(analyzer); 

     IndexWriter w = new IndexWriter(index, config); 
     addDoc(w, "Lucene in Action", "193398817"); 
     addDoc(w, "Lucene for Dummies", "55320055Z"); 
     addDoc(w, "Managing Gigabytes", "55063554A"); 
     addDoc(w, "The Art of Computer Science", "9900333X"); 
     w.close(); 

     // 2. query 
     String querystr = args.length > 0 ? args[0] : "lucene"; 

     // the "title" arg specifies the default field to use 
     // when no field is explicitly specified in the query. 
     Query q = null; 
     try { 
      q = new QueryParser(Version.LUCENE_6_6_0, "title", analyzer).parse(querystr); 
     } catch (org.apache.lucene.queryparser.classic.ParseException e) { 
      e.printStackTrace(); 
     } 

     // 3. search 
     int hitsPerPage = 10; 
     IndexReader reader = DirectoryReader.open(index); 
     IndexSearcher searcher = new IndexSearcher(reader); 
     TopScoreDocCollector collector = TopScoreDocCollector.create(hitsPerPage, true); 
     searcher.search(q, collector); 
     ScoreDoc[] hits = collector.topDocs().scoreDocs; 

     // 4. display results 
     System.out.println("Found " + hits.length + " hits."); 
     for (int i = 0; i < hits.length; ++i) { 
      int docId = hits[i].doc; 
      Document d = searcher.doc(docId); 
      System.out.println((i + 1) + ". " + d.get("isbn") + "\t" + d.get("title")); 
     } 

     // reader can only be closed when there 
     // is no need to access the documents any more. 
     reader.close(); 
    } 

    private static void addDoc(IndexWriter w, String title, String isbn) throws IOException { 
     Document doc = new Document(); 
     doc.add(new TextField("title", title, Field.Store.YES)); 

     // use a string field for isbn because we don't want it tokenized 
     doc.add(new StringField("isbn", isbn, Field.Store.YES)); 
     w.addDocument(doc); 
    } 
} 

谢谢！

Answer 1

问题解决了。 最初，在构建路径中，只添加了Lucene-core-6.6.0，但lucene-queryparser-6.6.0是单独的jar文件，需要单独添加。