Conversion between date format (dates) and long types _date

Indexing and searching for dates in Lucenen

Declare
private date[] dates = {};

Storing dates in an array in a fixed format

private void Setdates () {
	SimpleDateFormat sdf = new SimpleDateFormat ("Yyyy-mm-dd");
	dates = new Date[ids.length];
	try {
		Dates[0] = Sdf.parse ("2010-02-19");
		DATES[1] = Sdf.parse ("2012-01-11");
		DATES[2] = Sdf.parse ("2011-09-19");
		DATES[3] = Sdf.parse ("2010-12-22");
		DATES[4] = Sdf.parse ("2012-01-01");
	} catch (ParseException e) {
		e.printstacktrace ();
	}
}

When indexing, it is not necessary to make the date segmentation and weighted values, and other operations

Doc.add (New Numericfield ("date", Field.store.yes,true). Setlongvalue (Dates[i].gettime ());

where SD is Scorcedoc

Search by ID, get ID corresponding to document
document DOC = Searcher.doc (sd.doc);
Converts a long type of date to date type
//from doc to get the value of the index in the date field to hold
Long num = long.valueof (doc.get ("date"));
SimpleDateFormat sdf1 = new SimpleDateFormat ("Yyyy-mm-dd");
Convert a long to date type
java.util.Date dt = new Date (num) by using the constructor function;
Formats the date type
String sdatetime = sdf1.format (DT);