不多说,直接上干货!
这是yyyy-MM-dd HH:mm:ss.S
GetIntervalDays.java
package zhouls.bigdata.DataFeatureSelection.sim; import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date; public class GetIntervalDays {
public static void main(String[] args) throws ParseException {
String s1 = "2017-01-16 22:28:11.0";
String s2 = "2017-04-03 16:49:57.0";
Date d1 = parseDate(s1);//解析成Date类型
Date d2 = parseDate(s2);//解析成Date类型
System.out.println(d1);//Mon Jan 16 22:28:11 CST 2017
System.out.println(d2);//Mon Apr 03 16:49:57 CST 2017
System.out.println(getIntervalDays(d1,d2));//相差的天数76 } /**
* 把字符串解析成日期
* @param s
* @return d
* @throws ParseException
*/
public static Date parseDate(String s) throws ParseException {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.S");
Date d = sdf.parse(s);
return d;
} /**
* 相差天数(隔24小时为相差1天,否则为0天)
* @param fDate
* @param oDate
* @return d
*/
public static int getIntervalDays(Date fDate, Date oDate) {
if (null == fDate || null == oDate) {
return -;
}
long intervalMilli = oDate.getTime() - fDate.getTime();
return (int) (intervalMilli / ( * * * ));
} }