The conversion of date in Java to DateTime, string, and date __java

This transformation is often met in the project and is briefly described:

(1) Date converted to datetime

DateTime corresponds to the timestamp in the Java database and is converted as follows:

		Java.util.Date Convert to timestamp
		date = new Date ();
		Timestamp Timestamp = new Timestamp (Date.gettime ()); 2013-01-14 22:45:36.484

(2) string converted to date

		String is converted to java.util.Date
		string str = "2013-01-14";
		SimpleDateFormat SDF = new SimpleDateFormat ("Yyyy-mm-dd");
		Date date = null; Initializes the date
		try {
			date = Sdf.parse (str);//mon the 00:00:00 CST 2013
		} catch (ParseException e) {
			E.prin Tstacktrace ();
		}

(3) Date converted to string

		Java.util.Date Convert to string
		date = new Date ();
		DateFormat format = new SimpleDateFormat ("Yyyy-mm-dd");
		String str = format.format (date); 2013-01-14

(4) string converted to Java.sql.Date

Convert to java.sql.Date The purpose is to manipulate the database

		String is converted to java.sql.Date
		string str = "2013-01-14";
		SimpleDateFormat SDF = new SimpleDateFormat ("Yyyy-mm-dd");
		Java.sql.Date sdate = null; Initializes the
		try {
			java.util.Date udate = sdf.parse (str);
			Sdate = new Java.sql.Date (Udate.gettime ()); 2013-01-14
		} catch (ParseException e) {
			e.printstacktrace ();
		}