package com.jesims.fund.util;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.LocalDate;
import java.time.Month;
import java.util.*;
public class DateUtil {
private static final DateFormat DATE_FORMAT = new SimpleDateFormat("yyyy-MM-dd");
public static void main(String[] args) throws ParseException {
SimpleDateFormat format =new SimpleDateFormat("yyyy-MM-dd");
// Date fromDate = format.parse("2020-12-12 00:00:00");
Date fromDate = format.parse("2020-12-12 00:00:00");
String time = "2021-01-01";
String time2 = "2021-12-30";
/* List<String> quarter = getQuarter(time, time2);
for (int i = 0; i <quarter.size() ; i++) {
String s = quarter.get(i);
String year = s.substring(0, 4);
String quarter1 = s.substring(5, 7);
// System.out.println(year);
// System.out.println(quarter1);
if (quarter1.equals("Q1")){
// System.out.println(year+"-01-01");
// System.out.println(year+"-02-28");
Calendar c = Calendar.getInstance();
c.setTime(fromDate);
c.set(Calendar.DAY_OF_MONTH, c.getActualMaximum(Calendar.DAY_OF_MONTH));
SimpleDateFormat format2 = new SimpleDateFormat("yyyy-MM-dd");
String last= format2.format(c.getTime());
System.out.println(last);
Calendar c2 = Calendar.getInstance(); // this takes current date
c2.setTime(fromDate);
c2.set(Calendar.DAY_OF_MONTH, 1);
// System.out.println(format2.format(c2.getTime()));
// System.out.println(format2.format(c.getTime())); // this returns java.util.Date
LocalDate startOrEndDayOfQuarter = getStartOrEndDayOfQuarter(true);
System.out.println(startOrEndDayOfQuarter);
}*/
// }
}
/**
* 获取指定时间段的季度
* 输出格式：[2021-Q1, 2021-Q2, 2021-Q3, 2021-Q4, 2022-Q1, 2022-Q2, 2022-Q3, 2022-Q4]
* @param starTime
* @param endTime
* @return
*/
public List<String> getQuarter(String starTime,String endTime){
// String time = "2021-01-01";
// String time2 = "2022-12-30";
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
Date dateTime = null;
Date dateTime2 = null;
try {
dateTime = simpleDateFormat.parse(starTime);
dateTime2 = simpleDateFormat.parse(endTime);
} catch (ParseException e) {
e.printStackTrace();
}
ArrayList<String> quarters = new ArrayList<String>();
Calendar cal = Calendar.getInstance();
cal.setTime(dateTime);
Calendar cal1 = Calendar.getInstance();
cal1.setTime(dateTime2);
while (cal1.getTime().after(cal.getTime()) || cal1.getTime().equals(cal.getTime())) {
int year = cal.get(Calendar.YEAR);
int month = cal.get(Calendar.MONTH) + 1;
int quarter = month % 3 == 0 ? (month / 3) : (month / 3) + 1;
quarters.add(year+"-Q" + quarter);
cal.add(Calendar.MONTH, 3);
}
System.out.println(quarters);
return quarters;
}
/**
* 获取两个日期之间的所有月份 输出格式[2016-02, 2016-03, 2016-04, 2016-05, 2016-06, 2016-07,
* 2016-08, 2016-09, 2016-10, 2016-11, 2016-12, 2017-01]"
* @param data1
* @param data2
* @return
*/
public List<String> getYearAndMonth(String data1,String data2){
// String data1 = "2016-02";// 开始时间
// String data2 = "2019-12";// 结束时间
List<String> list = new ArrayList<String>();
try {
Date startDate = new SimpleDateFormat("yyyy-MM-dd").parse(data1);
Date endDate = new SimpleDateFormat("yyyy-MM-dd").parse(data2);
Calendar calendar = Calendar.getInstance();
calendar.setTime(startDate);
// 获取开始年份和开始月份
int startYear = calendar.get(Calendar.YEAR);
int startMonth = calendar.get(Calendar.MONTH);
// 获取结束年份和结束月份
calendar.setTime(endDate);
int endYear = calendar.get(Calendar.YEAR);
int endMonth = calendar.get(Calendar.MONTH);
//
for (int i = startYear; i <= endYear; i++) {
String date = "";
if (startYear == endYear) {
for (int j = startMonth; j <= endMonth; j++) {
if (j < 9) {
date = i + "-0" + (j + 1);
} else {
date = i + "-" + (j + 1);
}
list.add(date);
}
} else {
if (i == startYear) {
for (int j = startMonth; j < 12; j++) {
if (j < 9) {
date = i + "-0" + (j + 1);
} else {
date = i + "-" + (j + 1);
}
list.add(date);
}
} else if (i == endYear) {
for (int j = 0; j <= endMonth; j++) {
if (j < 9) {
date = i + "-0" + (j + 1);
} else {
date = i + "-" + (j + 1);
}
list.add(date);
}
} else {
for (int j = 0; j < 12; j++) {
if (j < 9) {
date = i + "-0" + (j + 1);
} else {
date = i + "-" + (j + 1);
}
list.add(date);
}
}
}
}
// 所有的月份已经准备好
//System.out.println(list);
for(int i = 0;i < list.size();i++){
System.out.println(list.get(i));
}
} catch (Exception e) {
e.printStackTrace();
}
return list;
}
/**
* 获取当前日期所在季度的开始日期和结束日期
* 季度一年四季， 第一季度：1月-3月， 第二季度：4月-6月， 第三季度：7月-9月， 第四季度：10月-12月
* @param isFirst true表示查询本季度开始日期 false表示查询本季度结束日期
* @return
*/
public static LocalDate getStartOrEndDayOfQuarter(Boolean isFirst){
LocalDate today=LocalDate.now();
LocalDate resDate = LocalDate.now();
if (today == null) {
today = resDate;
}
Month month = today.getMonth();
Month firstMonthOfQuarter = month.firstMonthOfQuarter();
Month endMonthOfQuarter = Month.of(firstMonthOfQuarter.getValue() + 2);
if (isFirst) {
resDate = LocalDate.of(today.getYear(), firstMonthOfQuarter, 1);
} else {
resDate = LocalDate.of(today.getYear(), endMonthOfQuarter, endMonthOfQuarter.length(today.isLeapYear()));
}
return resDate;
}
public static void getDateTime() throws ParseException{
Date date = new Date();
Calendar now = Calendar.getInstance();
System.out.println("年: " + now.get(Calendar.YEAR));
System.out.println("月: " + (now.get(Calendar.MONTH) + 1) + "");
System.out.println("日: " + now.get(Calendar.DAY_OF_MONTH));
System.out.println("时: " + now.get(Calendar.HOUR_OF_DAY));
System.out.println("分: " + now.get(Calendar.MINUTE));
System.out.println("秒: " + now.get(Calendar.SECOND));
System.out.println("当前时间毫秒数：" + now.getTimeInMillis());
System.out.println(now.getTime());
Date d = new Date();
System.out.println(d);
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String dateNowStr = sdf.format(d);
System.out.println("格式化后的日期：" + dateNowStr);
String str = "2012-1-13 17:26:33"; //要跟上面sdf定义的格式一样
Date today = sdf.parse(str);
System.out.println("字符串转成日期：" + today);
}
/**
* 获取前x月的日期
* @param month
* @return
*/
public Map<String,String> getNowAndBefore(int month){
Date now = new Date();
Date newDate = stepMonth(now, -month);
Map<String,String> map =new HashMap<>();
// 现在时间
map.put("now",DATE_FORMAT.format(now));
// 之前时间
map.put("before",DATE_FORMAT.format(newDate));
return map;
}
/**
* 获取前x月的日期
* @param month
* @return (Data类型)
*/
public Map<String,Date> getNowAndBeforeData(int month){
Date now = new Date();
Date newDate = stepMonth(now, -month);
Map<String,Date> map =new HashMap<>();
// 现在时间
map.put("now",now);
// 之前时间
map.put("before",newDate);
return map;
}
/**
* 获取后x天的日期
* @param day
* @return
*/
public Map<String,String> getNowAndChangeDay(int day){
Date now = new Date();
Date newDate = stepDay(now, day);
Map<String,String> map =new HashMap<>();
// 现在时间
map.put("now",DATE_FORMAT.format(now));
// 之后时间
map.put("change",DATE_FORMAT.format(newDate));
return map;
}
/**
* 在给定的日期加上或减去指定月份后的日期
* @param sourceDate 原始时间
* @param month 要调整的月份，向前为负数，向后为正数
* @return
*/
public Date stepMonth(Date sourceDate, int month) {
Calendar c = Calendar.getInstance();
c.setTime(sourceDate);
c.add(Calendar.MONTH, month);
return c.getTime();
}
/**
* 在给定的日期加上或减去指定月份后的日期
* @param
* @param day 要调整的天数，向前为负数，向后为正数
* @return
*/
public Date stepDay(Date sourceDate, int day) {
Calendar c = Calendar.getInstance();
c.setTime(sourceDate);
c.add(Calendar.DAY_OF_MONTH, day);
return c.getTime();
}
/**
* 输出如下：
* "[2016-02, 2016-03, 2016-04, 2016-05, 2016-06, 2016-07,
* 2016-08, 2016-09, 2016-10, 2016-11, 2016-12, 2017-01]"
*/
/**
* 获取当前系统时间最近12月的年月（含当月）
* @return
*/
public String[] getLatest12Month(){
String[] latest12Months = new String[12];
Calendar cal = Calendar.getInstance();
cal.set(Calendar.MONTH, cal.get(Calendar.MONTH)+1); //要先+1,才能把本月的算进去
for(int i=0; i<12; i++){
cal.set(Calendar.MONTH, cal.get(Calendar.MONTH)-1); //逐次往前推1个月
latest12Months[11-i] = cal.get(Calendar.YEAR)+ "-" +fillZero(cal.get(Calendar.MONTH)+1);
}
System.out.println(Arrays.toString(latest12Months));
return latest12Months;
}
public List<String> getLast12Month(){
List<String> list =new ArrayList<>();
String[] latest12Month = getLatest12Month();
for (int i = 0; i < latest12Month.length; i++) {
list.add(latest12Month[i]);
}
for (int i = 0; i < list.size(); i++) {
System.out.println(list.get(i));
}
return list;
}
/**
* 格式化月份
*/
public static String fillZero(int i){
String month = "";
if(i<10){
month = "0" + i;
}else{
month = String.valueOf(i);
}
return month;
}
/**
* 计算两个日期之间相差的天数 (Data类型的日期)
* @param smdate 较小的时间
* @param bdate 较大的时间
* @return 相差天数
* @throws ParseException
*/
public int daysBetweenData(Date smdate,Date bdate) throws ParseException
{
SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
smdate=sdf.parse(sdf.format(smdate));
bdate=sdf.parse(sdf.format(bdate));
Calendar cal = Calendar.getInstance();
cal.setTime(smdate);
long time1 = cal.getTimeInMillis();
cal.setTime(bdate);
long time2 = cal.getTimeInMillis();
long between_days=(time2-time1)/(1000*3600*24);
return Integer.parseInt(String.valueOf(between_days));
}
/**
*计算两个日期之间相差的天数（String类型的日期）
* @param smdate 较小的时间
* @param bdate 较大的时间
* @return 相差天数
* @throws ParseException
*/
public int daysBetweenString(String smdate,String bdate) {
Integer day = 0;
try {
SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
Calendar cal = Calendar.getInstance();
cal.setTime(sdf.parse(smdate));
long time1 = cal.getTimeInMillis();
cal.setTime(sdf.parse(bdate));
long time2 = cal.getTimeInMillis();
long between_days=(time2-time1)/(1000*3600*24);
day = Integer.parseInt(String.valueOf(between_days));
}catch (ParseException e ){
e.printStackTrace();
}
return day;
}
}
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