SimpleDateFormatDemo1 Date和String格式的转换

public class SimpleDateFormatDemo1 {

    public static void main(String[] args) throws ParseException {
        //先实例化SimpleDateFormat
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

        //实例化Date
        Date date = new Date();

        //Date --- String
        String timeStr = sdf.format(date);
        //输出转换后的字符串
        System.out.println(timeStr);        //2016-04-30

        //String --- Date 
        String time = "2016-12-8";
        //按照sdf定义格式,解析字符串,转换成date格式
        date = sdf.parse(time);
        //输出转换后的date
        System.out.println(date);    //Thu Dec 08 00:00:00 GMT+08:00 2016
    }
}