java根据开始时间结束时间计算中间间隔日期的实例代码
具体代码如下所述:
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
public class Test {
public static List<String> findDates(String stime, String etime)
throws ParseException {
List<String> allDate = new ArrayList();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Date dBegin = sdf.parse(stime);
Date dEnd = sdf.parse(etime);
allDate.add(sdf.format(dBegin));
Calendar calBegin = Calendar.getInstance();
// 使用给定的 Date 设置此 Calendar 的时间
calBegin.setTime(dBegin);
Calendar calEnd = Calendar.getInstance();
// 使用给定的 Date 设置此 Calendar 的时间
calEnd.setTime(dEnd);
// 测试此日期是否在指定日期之后
while (dEnd.after(calBegin.getTime())) {
// 根据日历的规则,为给定的日历字段添加或减去指定的时间量
calBegin.add(Calendar.DAY_OF_MONTH, 1);
allDate.add(sdf.format(calBegin.getTime()));
}
return allDate;
}
public static void main(String[] args) {
//测试数据
String stime = "2019-05-01";
String etime = "2019-05-05";
//集合中包含2019-05-01/2019-05-05,不需要可去除
List<String> list = new ArrayList<>();
try {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
long s = Long.valueOf(sdf.parse(stime).getTime());
long e = Long.valueOf(sdf.parse(etime).getTime());
//只有结束时间大于开始时间时才进行查询
if(s<e) {
list = findDates(stime, etime);
}
} catch (ParseException e) {
e.printStackTrace();
}
for(String time : list) {
System.out.println(time);
}
System.out.println("间隔天数:" + list.size());
}
}
ps:下面看下java根据开始时间和结束时间,计算中间天数,并打印
import java.text.SimpleDateFormat;
import java.util.Date;
public class Calcdate {
static SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
static SimpleDateFormat ymd = new SimpleDateFormat("yyyy-MM-dd");
public static void main(String[] args)throws Exception{
Date beginTime = sdf.parse("2015-04-23 12:32:44");
// Date endTime = sdf.parse("2015-04-23 14:56:44");
Date endTime = sdf.parse("2015-04-29 14:56:44");
long diff = (endTime.getTime() - beginTime.getTime()) / (86400 * 1000);
System.out.println("diff = " + diff);
Date sb = null;
Date se = null;
if(diff == 0){
sb = beginTime;
se = endTime;
String ss = String.format("%d> Sb=%s, Se=%s", 1, Coder.DateTimeToStr(sb), Coder.DateTimeToStr(se));
System.out.println(ss);
}else {
int i = 0;
while (i <= diff) {
if (i == 0) {
sb = beginTime;
se = sdf.parse(ymd.format(sb) + " 23:59:59");
} else if (i == diff) {
sb = sdf.parse(ymd.format(endTime) + " 00:00:00");
se = endTime;
} else {
se = new Date(beginTime.getTime() + i * 24 * 60 * 60 * 1000);
sb = sdf.parse(ymd.format(se) + " 00:00:00");
se = sdf.parse(ymd.format(se) + " 23:59:59");
}
String ss = String.format("%d> Sb=%s, Se=%s", i, Coder.DateTimeToStr(sb), Coder.DateTimeToStr(se));
System.out.println(ss);
i++;
}
}
}
}
diff = 6
0> Sb=2015-04-23 12:32:44, Se=2015-04-23 23:59:59
1> Sb=2015-04-24 00:00:00, Se=2015-04-24 23:59:59
2> Sb=2015-04-25 00:00:00, Se=2015-04-25 23:59:59
3> Sb=2015-04-26 00:00:00, Se=2015-04-26 23:59:59
4> Sb=2015-04-27 00:00:00, Se=2015-04-27 23:59:59
5> Sb=2015-04-28 00:00:00, Se=2015-04-28 23:59:59
6> Sb=2015-04-29 00:00:00, Se=2015-04-29 14:56:44
总结
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