package org.springblade.jfpt.parcel.util;
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import java.text.ParseException;
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import java.text.SimpleDateFormat;
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import java.util.ArrayList;
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import java.util.Calendar;
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import java.util.Date;
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import java.util.List;
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/**
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* 日期工具类
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*/
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public class DateUtils {
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/**
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* 获取今天
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* @return String
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* */
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public static String getToday(){
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return new SimpleDateFormat("yyyy-MM-dd").format(new Date());
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}
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/**
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* 获取昨天
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* @return String
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* */
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public static String getYestoday(){
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Calendar cal=Calendar.getInstance();
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cal.add(Calendar.DATE,-1);
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Date time=cal.getTime();
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return new SimpleDateFormat("yyyy-MM-dd").format(time);
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}
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/**
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* 获取本月开始日期
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* @return String
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* **/
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public static String getMonthStart(){
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Calendar cal=Calendar.getInstance();
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cal.add(Calendar.MONTH, 0);
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cal.set(Calendar.DAY_OF_MONTH, 1);
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Date time=cal.getTime();
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return new SimpleDateFormat("yyyy-MM-dd").format(time);
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}
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/**
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* 获取本月最后一天
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* @return String
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* **/
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public static String getMonthEnd(){
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Calendar cal=Calendar.getInstance();
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cal.set(Calendar.DAY_OF_MONTH, cal.getActualMaximum(Calendar.DAY_OF_MONTH));
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Date time=cal.getTime();
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return new SimpleDateFormat("yyyy-MM-dd").format(time);
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}
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/**
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* 获取本周的第一天
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* @return String
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* **/
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public static String getWeekStart(){
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Calendar cal=Calendar.getInstance();
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cal.add(Calendar.WEEK_OF_MONTH, 0);
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cal.set(Calendar.DAY_OF_WEEK, 2);
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Date time=cal.getTime();
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return new SimpleDateFormat("yyyy-MM-dd").format(time);
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}
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/**
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* 获取本周的最后一天
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* @return String
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* **/
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public static String getWeekEnd(){
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Calendar cal=Calendar.getInstance();
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cal.set(Calendar.DAY_OF_WEEK, cal.getActualMaximum(Calendar.DAY_OF_WEEK));
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cal.add(Calendar.DAY_OF_WEEK, 1);
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Date time=cal.getTime();
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return new SimpleDateFormat("yyyy-MM-dd").format(time);
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}
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/**
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* 获取本年的第一天
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* @return String
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* **/
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public static String getYearStart(){
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return new SimpleDateFormat("yyyy").format(new Date())+"-01-01";
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}
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/**
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* 获取本年的最后一天
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* @return String
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* **/
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public static String getYearEnd(){
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Calendar calendar = Calendar.getInstance();
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calendar.set(Calendar.MONTH,calendar.getActualMaximum(Calendar.MONTH));
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calendar.set(Calendar.DAY_OF_MONTH,calendar.getActualMaximum(Calendar.DAY_OF_MONTH));
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Date currYearLast = calendar.getTime();
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return new SimpleDateFormat("yyyy-MM-dd").format(currYearLast)+" 23:59:59";
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}
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/**
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* 获取过去7天内的日期数组
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* @return 日期数组
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*/
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public static ArrayList<String> pastDay(String time){
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ArrayList<String> pastDaysList = new ArrayList<>();
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try {
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//我这里传来的时间是个string类型的，所以要先转为date类型的。
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SimpleDateFormat sdf= new SimpleDateFormat("yyyy-MM-dd");
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Date date = sdf.parse(time);
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for (int i = 6; i >= 0; i--) {
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pastDaysList.add(getPastDate(i,date));
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}
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}catch (ParseException e){
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e.printStackTrace();
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}
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return pastDaysList;
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}
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/**
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* 获取过去第几天的日期
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*
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* @param past
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* @return
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*/
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public static String getPastDate(int past,Date date) {
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Calendar calendar = Calendar.getInstance();
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calendar.setTime(date);
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calendar.set(Calendar.DATE, calendar.get(Calendar.DATE) - past);
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Date today = calendar.getTime();
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SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
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return sdf.format(today);
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}
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/**
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* 获取时间段内每天的日期
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*
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* @param startDate 开始日期 yyyy-MM-dd HH:mm:ss
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* @param endDate 结束日期 yyyy-MM-dd HH:mm:ss
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* @return
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*/
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public static List<String> getTimeOverOneDate(String startDate, String endDate) {
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List<String> times = new ArrayList<>();
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try {
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if (startDate.length()<11){
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startDate = startDate+" 00:00:00";
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endDate = endDate+" 23:59:59";
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}
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Date startTime = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").parse(startDate);
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Date endTime = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").parse(endDate);
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int gap = (int) ((endTime.getTime() - startTime.getTime()) / (24*60*60*1000));
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times.clear();
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Calendar cld = Calendar.getInstance();
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cld.setTime(startTime);
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for (int i = 0; i < gap +1; i++) {
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times.add(new SimpleDateFormat("yyyy-MM-dd").format(cld.getTime()));
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cld.add(Calendar.DATE,1);
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}
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return times;
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} catch (ParseException e) {
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e.printStackTrace();
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}
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return null;
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}
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}
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