一. 介绍
有时我们需要把某个时间范围进行时间段的切分，故此记录实现方式，欢迎大神点评帮忙优化和精简！
二. Java实现源码
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| package com.vanbrother.p2p.service.common.utils.hessian;
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 DateUtils {
public static String YEAR_REGEX = "^\\d{4}$";
public static String MONTH_REGEX = "^\\d{4}(\\-|\\/|\\.)\\d{1,2}$";
public static String DATE_REGEX = "^\\d{4}(\\-|\\/|\\.)\\d{1,2}\\1\\d{1,2}$";
public static String format(Date date, String pattern) {
SimpleDateFormat sd = new SimpleDateFormat(pattern);
return sd.format(date);
}
public static Date parse(String date, String pattern) throws ParseException {
SimpleDateFormat sd = new SimpleDateFormat(pattern);
try {
return sd.parse(date);
} catch (ParseException e) {
throw e;
}
}
public static List<String> sliceUpDateRange(String startDate, String endDate) {
List<String> rs = new ArrayList<>();
try {
int dt = Calendar.DATE;
String pattern = "yyyy-MM-dd";
if(startDate.matches(YEAR_REGEX)) {
pattern = "yyyy";
dt = Calendar.YEAR;
} else if(startDate.matches(MONTH_REGEX)) {
pattern = "yyyy-MM";
dt = Calendar.MONTH;
} else if(startDate.matches(DATE_REGEX)) {
pattern = "yyyy-MM-dd";
dt = Calendar.DATE;
}
Calendar sc = Calendar.getInstance();
Calendar ec = Calendar.getInstance();
sc.setTime(parse(startDate, pattern));
ec.setTime(parse(endDate, pattern));
while(sc.compareTo(ec) < 1){
rs.add(format(sc.getTime(), pattern));
sc.add(dt, 1);
}
} catch (ParseException e) {
e.printStackTrace();
}
return rs;
}
}
|
