Java – how to index date fields in Lucene

I'm new to Lucene I must index the date field

IndexWriter writer = new IndexWriter(FSDirectory.open(indexDir),new WhitespaceAnalyzer(),true,IndexWriter.MaxFieldLength.UNLIMITED)

My opinion is: why do I need an analyzer when there is no analysis date field, and I use field for index Index. NOT_ ANALYZED.

Solution

You can store date fields in this way

Document doc = new Document();
doc.add(new Field("modified",DateTools.timeToString(f.lastModified(),DateTools.Resolution.MINUTE),Field.Store.YES,Field.Index.NOT_ANALYZED));

Where f is the file object

Now use the above document as the index writer

The checkout sample code comes with Lucene... And the following link http://lucene.apache.org/java/2_2_0/api/org/apache/lucene/document/DateTools.html

UPDATE

Field. Index NOT_ ANALYZED

According to Lucene Javadoc, you do not need to use field Index NOT_ Analyzed analyzes fields, but I think, by design, indexwriter expects the analyzer to index exact copies of data, which is inefficient in storage and search