LUCENE_40 无法解析或不是字段

Question

StandardAnalyzer analyzer = new StandardAnalyzer(Version.LUCENE_40);

我正在运行 lucene 搜索代码，但在上面一行中出现错误提示

LUCENE_40 cannot be resolved or is not a field

我正在使用 lucene 5.1.0 版本。

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我已经version.LUCENE_40 从标准分析器参数中删除了，所以现在代码中没有错误，但是当我运行代码时，出现错误：

StandardAnalyzer analyzer = new StandardAnalyzer(Version.LUCENE_40);

这是代码：

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

import java.io.IOException;


public class HelloLucene {
    public static void main(String[] args) throws IOException, ParseException {

        StandardAnalyzer analyzer = new StandardAnalyzer();
        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();
        String querystr = args.length > 0 ? args[0] : "lucene";    
        Query q = new QueryParser("title", analyzer).parse(querystr);
        int hitsPerPage = 10;
        IndexReader reader = DirectoryReader.open(index);
        IndexSearcher searcher = new IndexSearcher(reader);
        TopScoreDocCollector collector = TopScoreDocCollector.create(hitsPerPage);
        searcher.search(q, collector);
        ScoreDoc[] hits = collector.topDocs().scoreDocs;
        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.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));

        doc.add(new StringField("isbn", isbn, Field.Store.YES));
        w.addDocument(doc);
    }
}

Answer 1

好吧，就像它说的，Version.LUCENE_40 不存在。 Lucene_4_0确实如此，但这只会给您带来下一个问题：

StandardAnalyzer不再需要版本参数。只需使用：

StandardAnalyzer analyzer = new StandardAnalyzer();