我尝试使用DateTools.dateToString()方法索引日期.它的工作正常索引和搜索.
但是我已经编入索引的数据有一些引用,就是将Date作为一个新的Date().getTime()进行索引.
所以我的问题是如何对这个数据执行RangeSearch Query
任何解决这个？
提前致谢.
解决方法
您需要在您的日期字段上使用TermRangeQuery.该字段始终需要使用DateTools.dateToString()进行索引,以使其正常工作.以下是使用Lucene 3.0在日期范围内进行索引和搜索的完整示例：
public class LuceneDateRange {
public static void main(String[] args) throws Exception {
// setup Lucene to use an in-memory index
Directory directory = new RAMDirectory();
Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_30);
MaxFieldLength mlf = MaxFieldLength.UNLIMITED;
IndexWriter writer = new IndexWriter(directory,analyzer,true,mlf);
// use the current time as the base of dates for this example
long baseTime = System.currentTimeMillis();
// index 10 documents with 1 second between dates
for (int i = 0; i < 10; i++) {
Document doc = new Document();
String id = String.valueOf(i);
String date = buildDate(baseTime + i * 1000);
doc.add(new Field("id",id,Store.YES,Index.NOT_ANALYZED));
doc.add(new Field("date",date,Index.NOT_ANALYZED));
writer.addDocument(doc);
}
writer.close();
// search for documents from 5 to 8 seconds after base,inclusive
IndexSearcher searcher = new IndexSearcher(directory);
String lowerDate = buildDate(baseTime + 5000);
String upperDate = buildDate(baseTime + 8000);
boolean includeLower = true;
boolean includeUpper = true;
TermRangeQuery query = new TermRangeQuery("date",lowerDate,upperDate,includeLower,includeUpper);
// display search results
TopDocs topDocs = searcher.search(query,10);
for (scoreDoc scoreDoc : topDocs.scoreDocs) {
Document doc = searcher.doc(scoreDoc.doc);
System.out.println(doc);
}
}
public static String buildDate(long time) {
return DateTools.dateToString(new Date(time),Resolution.SECOND);
}
}
