java 获取两个日期的天数间隔

我会带着你远行 2023-10-18 08:54 76阅读 0赞

## java 获取两个日期的天数间隔 ##

##### 主要使用 java8 的 #####

import java.time.LocalDate;  
import java.time.temporal.ChronoUnit;

package com.example.books.utils;
    
    import java.text.ParseException;
    import java.text.SimpleDateFormat;
    import java.time.LocalDate;
    import java.time.temporal.ChronoUnit;
    import java.util.Date;
    
    public class DateTimeUtil {
        
    
        /**
         * 时间戳转日期时间
         * @param s
         * @return
         */
        public static Date stampToDate(String s){
            SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
            long lt = new Long(s);
            return new Date(lt);
        }
    
        /**
         * 计算现在到某一个日期的间隔天数
         * @param endDate
         * @return
         */
        public static long currentToEnd(Date endDate){
            String[] currentStr = new SimpleDateFormat("yyyy-MM-dd").format(new Date()).split("-");
            String[] endStr = new SimpleDateFormat("yyyy-MM-dd").format(endDate).split("-");
            Integer currentYear = Integer.parseInt(currentStr[0]);
            Integer currentMonth = Integer.parseInt(currentStr[1]);
            Integer currentDay = Integer.parseInt(currentStr[2]);
            Integer endYear = Integer.parseInt(endStr[0]);
            Integer endMonth = Integer.parseInt(endStr[1]);
            Integer endDay = Integer.parseInt(endStr[2]);
            LocalDate endLocalDate = LocalDate.of(endYear,endMonth,endDay);
            return LocalDate.now().until(endLocalDate,ChronoUnit.DAYS);
        }
    
        /**
         * 计算两个日期之间的间隔天数
         * @param startDate
         * @param endDate
         * @return
         */
        public static long startToEnd(Date startDate, Date endDate){
            String[] startStr = new SimpleDateFormat("yyyy-MM-dd").format(startDate).split("-");
            String[] endStr = new SimpleDateFormat("yyyy-MM-dd").format(endDate).split("-");
            Integer startYear = Integer.parseInt(startStr[0]);
            Integer startMonth = Integer.parseInt(startStr[1]);
            Integer startDay = Integer.parseInt(startStr[2]);
            Integer endYear = Integer.parseInt(endStr[0]);
            Integer endMonth = Integer.parseInt(endStr[1]);
            Integer endDay = Integer.parseInt(endStr[2]);
            LocalDate endLocalDate = LocalDate.of(endYear,endMonth,endDay);
            LocalDate startLocalDate = LocalDate.of(startYear,startMonth,startDay);
            return startLocalDate.until(endLocalDate,ChronoUnit.DAYS);
        }
    
        public static void main(String[] args) {
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
            Date startDate = null;
            try {
                startDate = sdf.parse("2018-09-01 15:42:55");
            } catch (ParseException e) {
                e.printStackTrace();
            }
            System.out.println("currentToEnd:"+DateTimeUtil.currentToEnd(startDate));
        }
    
    }