日期格式转换

import java.sql.Timestamp;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

public class TimeFormat {
	public static void main(String[] args) {
		Date date = null;
		String str = null;
		
		// 1 Date==>>String
		date = new Date();
System.out.println(date);
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
		str = sdf.format(date);
System.out.println(str);
		
		// 2 String==>>Date
		str = "2012-9-12";
		try {
			date = sdf.parse(str);
		} catch (ParseException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		System.out.println(date);
		date = new Date();
		System.out.println(date.getTime());
		Timestamp tp = new Timestamp(date.getTime());
		System.out.println(tp);
		System.out.println(Timestamp.valueOf("2012-12-12 12:12:12"));
	}
}