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41 lines (36 loc) · 1.51 KB
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package studyjava;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
public class Dates {
public void dateMethod() throws ParseException {
String i = "1995/1/1 00:00:00";
String h = "1995/12/31 23:59:59";
SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd hh:mm:ss");
long date1 = sdf.parse(i).getTime();
long date2 = sdf.parse(h).getTime();
long l = (long) (date1 + Math.random() * (date2 - date1 + 1));
Date date = new Date(l);
System.out.println(date.toString());
}
public void formatMethod() throws ParseException {
/*准备一个长度是9的日期数组
使用1970年-2000年之间的随机日期初始化该数组
按照这些日期的时间进行升序排序
比如 1988-1-21 12:33:22 就会排在 1978-4-21 19:07:23 前面，因为它的时间更小，虽然日期更大 */
Date[] dates = new Date[9];
String start = "1970.0.0 00:00:00";
String end = "2000.0.0 00:00:00";
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy.MM.dd hh:mm:ss");
long date1 = simpleDateFormat.parse(start).getTime();
long date2 = simpleDateFormat.parse(end).getTime();
long l = (long) (date1 + Math.random() * (date2 - date1 + 1));
for (int i = 0; i < dates.length; i++) {
dates[i] = new Date(l);
System.out.println(dates[i].toString());
}
}
public static void main(String[] args) {
;
}
}