目录
Date date = new Date();//获取当前时间
DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
1.date转String
String dateS=df.format(date);
2.String转date
String dateS="2020.12.12-08.23.21";
df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date d = df.parse(dStr);
3.Date转long型
Date date = new Date();
long dateTime = date.getTime();
4.long转Date
long dateTime = 14830688888666;
Date date = new Date(dateTime);