lucene利用sort对查询结果进行排序示例

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利用sort对查询结果进行排序示例

对于要排序的字段，在索引的时候可以Field.Index.NOT_ANALYZED

package com.cn;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.index.IndexWriterConfig;import org.apache.lucene.index.Term;import org.apache.lucene.search.IndexSearcher;import org.apache.lucene.search.Query;import org.apache.lucene.search.ScoreDoc;import org.apache.lucene.search.Sort;import org.apache.lucene.search.SortField;import org.apache.lucene.search.TermQuery;import org.apache.lucene.search.TopDocs;import org.apache.lucene.store.Directory;import org.apache.lucene.store.RAMDirectory;import org.apache.lucene.util.Version;public class TTT {public static void main(String []args)throws Exception {String [] ids = {"1","2","3","4","5"};String [] bookName = {"java start","java begin","java in action","java web","java ssh"};String [] page = {"300","400","256","302","279"};String [] price = {"89","99","70","60","120"};Directory directory = new RAMDirectory();IndexWriter indexWriter = new IndexWriter(directory,new IndexWriterConfig(Version.LUCENE_34, new StandardAnalyzer(Version.LUCENE_34)));for(int i = 0;i < ids.length;i++){Document doc = new Document();doc.add(new Field("id",ids[i],Field.Store.YES,Field.Index.NOT_ANALYZED));doc.add(new Field("bookName",bookName[i],Field.Store.YES,Field.Index.ANALYZED));doc.add(new Field("page",page[i],Field.Store.YES,Field.Index.NOT_ANALYZED));doc.add(new Field("price",price[i],Field.Store.YES,Field.Index.NOT_ANALYZED));indexWriter.addDocument(doc);}System.out.println("total:"+indexWriter.numDocs());indexWriter.close();Term term = new Term("bookName","java");Query query = new TermQuery(term);IndexSearcher indexSearcher = new IndexSearcher(directory);Sort sort = new Sort();SortField sortField = new SortField("price", SortField.INT);sort.setSort(sortField);TopDocs topDocs = indexSearcher.search(query, 10, sort);ScoreDoc [] scoreDoc = topDocs.scoreDocs;for(int i=0;i<scoreDoc.length;i++){Document d = indexSearcher.doc(scoreDoc[i].doc);System.out.println(d.get("bookName")+"\t"+d.get("page")+"\t"+d.get("price"));}}}

运行结果为：

total:5
java web   302   60
java in action   256   70
java start   300   89
java begin   400   99
java ssh   279   120