不多说，直接上干货！

 

 

 

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 -1;

}

long intervalMilli = oDate.getTime() - fDate.getTime();

return (int) (intervalMilli / (24 * 60 * 60 * 1000));

}

}

 

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