我想根據數字字段對我的搜索結果進行排序。 在下面的示例代碼中,我想根據「年齡」字段進行排序。 我使用的答案從開始:如何排序Lucene中的數字字段6
[How to sort IntPont or LongPoint field in Lucene 6
但它確實排序依據得分。年齡還沒有上升。
而且
[Sorting search result in Lucene based on a numeric field
我在搜索功能改變SortField.Type.SCORE到SortField.Type.LONG。 但我得到:
意外docvalues類型NONE現場 '年齡'(預期= NUMERIC)
這裏我的代碼:
public class TestLongPointSort {
public static void main(String[] args) throws Exception {
String indexPath = "/tmp/testSort";
Analyzer standardAnalyzer = new StandardAnalyzer();
Directory indexDir = FSDirectory.open(Paths.get(indexPath));
IndexWriterConfig iwc = new IndexWriterConfig(standardAnalyzer);
iwc.setOpenMode(IndexWriterConfig.OpenMode.CREATE_OR_APPEND);
IndexWriter masterIndex = new IndexWriter(indexDir, iwc);
Document doc = new Document();
String name = "bob";
doc.add(new TextField("name", name, Field.Store.YES));
doc.add(new SortedDocValuesField("name", new BytesRef(name)));
doc.add(new SortedNumericDocValuesField("age", 20L));
doc.add(new StoredField("age", 20L));
long ts = System.currentTimeMillis();
doc.add(new SortedNumericDocValuesField("ts", ts));
doc.add(new StoredField("ts", ts));
masterIndex.addDocument(doc);
Thread.sleep(1);
name = "max";
doc = new Document();
doc.add(new TextField("name", name, Field.Store.YES));
doc.add(new SortedDocValuesField("name", new BytesRef(name)));
doc.add(new SortedNumericDocValuesField("age", 19L));
doc.add(new StoredField("age", 19L));
ts = System.currentTimeMillis();
doc.add(new SortedNumericDocValuesField("ts", ts));
doc.add(new StoredField("ts", ts));
masterIndex.addDocument(doc);
Thread.sleep(1);
name = "jim";
doc = new Document();
doc.add(new TextField("name", name, Field.Store.YES));
doc.add(new SortedDocValuesField("name", new BytesRef(name)));
doc.add(new SortedNumericDocValuesField("age", 21L));
doc.add(new StoredField("age", 21L));
ts = System.currentTimeMillis();
doc.add(new SortedNumericDocValuesField("ts", ts));
doc.add(new StoredField("ts", ts));
masterIndex.addDocument(doc);
masterIndex.commit();
masterIndex.close();
IndexReader reader = DirectoryReader.open(FSDirectory.open(Paths.get(indexPath)));
IndexSearcher searcher = new IndexSearcher(reader);
Analyzer analyzer = new KeywordAnalyzer();
QueryParser queryParser = new QueryParser("message", analyzer);
Sort sort;
TopDocs docs;
sort = new Sort(new SortField("name", SortField.Type.STRING));
docs = searcher.search(new MatchAllDocsQuery(), 100, sort);
System.out.println("Sorted by name");
for (ScoreDoc scoreDoc : docs.scoreDocs) {
Document doc2 = searcher.doc(scoreDoc.doc);
System.out.println("Name:" + doc2.get("name") + " ; age:" + doc2.get("age") + " ; ts:" + doc2.get("ts"));
}
//docs = searcher.search(new MatchAllDocsQuery(), 100, new Sort(new SortField("age", SortField.Type.SCORE, true)));
docs = searcher.search(new MatchAllDocsQuery(), 100, new Sort(new SortField("age", SortField.Type.LONG, true)));
System.out.println("Sorted by age");
for (ScoreDoc scoreDoc : docs.scoreDocs) {
Document doc2 = searcher.doc(scoreDoc.doc);
System.out.println("Name:" + doc2.get("name") + " ; age:" + doc2.get("age") + " ; ts:" + doc2.get("ts"));
}
reader.close();
}
}
我們可以看到,分揀STRING被不錯,但我沒有弄清楚如何讓我的數字(長)分類。
什麼是排序數字字段的正確方法?
感謝
其實,我也嘗試了這一個。仍然有錯誤。只是不同的:意外的文檔類型NONE爲字段'年齡'(期望[SORTED_NUMERIC,NUMERIC]之一) – moonbeam
@moonbeam - 合理地確信你錯了,是我用這個修改運行*你的代碼*,它工作得很好。 – femtoRgon
我確實剪下粘貼你的代碼。你使用的是什麼版本的Lucene?我正在使用6.4.1 – moonbeam