lucene 排序查找结果

import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.queryParser.QueryParser;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.Hits;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Sort;

public class TestSearch
{
    public static final String indexpath = "/root/index";
    
    public static void main(String args[]) throws Exception
    {
        IndexWriter writer = new IndexWriter(indexpath, new StandardAnalyzer(), true);
        
        Document doc1 = new Document();
        
        Field field1 = new Field("booknum", "00001", Field.Store.YES, Field.Index.UN_TOKENIZED);
        Field field2 = new Field("content", "fan fei", Field.Store.YES, Field.Index.TOKENIZED);
        
        doc1.add(field1);
        doc1.add(field2);
        
        Document doc2 = new Document();
        
        Field field3 = new Field("booknum", "00002", Field.Store.YES, Field.Index.UN_TOKENIZED);
        Field field4 = new Field("content", "fan song", Field.Store.YES, Field.Index.TOKENIZED);
        
        doc2.add(field3);
        doc2.add(field4);
        
        writer.addDocument(doc1);
        writer.addDocument(doc2);
        writer.close();
        
        IndexSearcher searcher = new IndexSearcher(indexpath);
        
        QueryParser parser = new QueryParser("content", new StandardAnalyzer());
        Query query = parser.parse("fan");
        
        Sort sort = new Sort();
        sort.setSort("booknum", true); // reverse sort

        
        Hits hits = searcher.search(query, sort);
        for (int i = 0; i < hits.length(); i++)
            System.out.println(hits.doc(i));
    }
}