常用的时间工具类

雨点打透心脏的1/2处 2022-09-01 09:23 216阅读 0赞

## 一 概述 ##

借助工具包实现，不同时间的处理：joda time

引入的类

import org.apache.commons.lang3.StringUtils;
    import org.joda.time.DateTime;
    import org.joda.time.format.DateTimeFormat;
    import org.joda.time.format.DateTimeFormatter;
    
    import java.text.SimpleDateFormat;
    import java.time.LocalDate;
    import java.util.Date;

引入的包

<dependency>
          <groupId>joda-time</groupId>
          <artifactId>joda-time</artifactId>
          <version>2.9.2</version>
    </dependency>

## 二 不同时间方法实现 ##

**声明时间格式**

>     private static final String STANDARD_FORMAT = "yyyy-MM-dd HH:mm:ss";
>     /**
>      * 时间格式(yyyy-MM-dd)
>      */
>     private final static String DATE_PATTERN = "yyyy-MM-dd";
>     
>     public static String today(String pattern) {
>         Date date = new Date();
>         if (pattern == null) {
>             pattern = STANDARD_FORMAT;
>         }
>         if (!pattern.equals(STANDARD_FORMAT) && !pattern.equals(DATE_PATTERN)) {
>             return StringUtils.EMPTY;
>         }
>         return format(date, pattern);
>     }

>     /**
>      * 日期格式化 日期格式为：yyyy-MM-dd
>      *
>      * @param date    日期
>      * @param pattern 格式，如：DateUtils.DATE_TIME_PATTERN
>      * @return 返回yyyy-MM-dd格式日期
>      */
>     public static String format(Date date, String pattern) {
>         if (date != null) {
>             SimpleDateFormat df = new SimpleDateFormat(pattern);
>             return df.format(date);
>         }
>         return null;
>     }

date类型 -> string类型

>     public static String dateToStr(Date date) {
>         if (date == null) return StringUtils.EMPTY;
>         DateTime dateTime = new DateTime(date);
>         return dateTime.toString(STANDARD_FORMAT);
>     }
> 
> or
> 
>     public static String dateToStr(Date date, String formatPattern) {
>         if (date == null) return StringUtils.EMPTY;
>         DateTime dateTime = new DateTime(date);
>         return dateTime.toString(formatPattern);
>     }

string类型 -> date类型

>     public static Date strToDate(String timeStr) {
>         DateTimeFormatter dateTimeFormatter = DateTimeFormat.forPattern(STANDARD_FORMAT);
>         DateTime dateTime = dateTimeFormatter.parseDateTime(timeStr);
>         return dateTime.toDate();
>     }
> 
> or
> 
>     public static Date strToDate2(String timeStr) {
>         DateTimeFormatter dateTimeFormatter = DateTimeFormat.forPattern(DATE_PATTERN);
>         DateTime dateTime = dateTimeFormatter.parseDateTime(timeStr);
>         return dateTime.toDate();
>     }

**判断时间是否过期或者之前**

>     public static boolean isTimeExpired(Date date) {
>         if (null == date) return true;
>         String timeStr = dateToStr(date);
>         return isBeforeNow(timeStr);
>     }
> 
> or
> 
>     private static boolean isBeforeNow(String timeStr) {
>         DateTimeFormatter format = DateTimeFormat.forPattern(STANDARD_FORMAT);
>         DateTime dateTime = DateTime.parse(timeStr, format);
>         return dateTime.isBeforeNow();
>     }
>     
>     判断是否为之前时间
>     /**
>      * 判断timeStr是否在当前时刻之前
>      *
>      * @param timeStr
>      * @return
>      */
>     private static boolean isBeforeNow(String timeStr) {
>         DateTimeFormatter format = DateTimeFormat.forPattern(STANDARD_FORMAT);
>         DateTime dateTime = DateTime.parse(timeStr, format);
>         return dateTime.isBeforeNow();
>     }

日期加/减月份

>     /**
>      * 日期加月份
>      *
>      * @param date
>      * @param months
>      * @return
>      */
>     public static Date plusMonths(Date date, Integer months) {
>         return plusOrMinusMonths(date, months, 0);
>     }
>     
>     /**
>      * 日期减月份
>      *
>      * @param date
>      * @param months
>      * @return
>      */
>     public static Date minusMonths(Date date, Integer months) {
>         return plusOrMinusMonths(date, months, 1);
>     }
>     
>     /**
>      * 加减月份
>      *
>      * @param date
>      * @param months
>      * @param type   0:加月份 1:减月份
>      * @return
>      */
>     private static Date plusOrMinusMonths(Date date, Integer months, Integer type) {
>         if (null == date) return null;
>         months = null == months ? 0 : months;
>     
>         DateTime dateTime = new DateTime(date);
>         if (type == 0) {
>             dateTime = dateTime.plusMonths(months);
>         } else {
>             dateTime = dateTime.minusMonths(months);
>         }
>     
>         return dateTime.toDate();
>     }

**日期加/减少天数**

>     /**
>      * 日期加天数
>      *
>      * @param date
>      * @param days
>      * @return
>      */
>     public static Date plusDays(Date date, Integer days) {
>         return plusOrMinusDays(date, days, 0);
>     }
>     
>     /**
>      * 日期减天数
>      *
>      * @param date
>      * @param days
>      * @return
>      */
>     public static Date minusDays(Date date, Integer days) {
>         return plusOrMinusDays(date, days, 1);
>     }
>     
>     /**
>      * 当日减天数
>      *
>      * @param days
>      * @return
>      */
>     public static String minusDays(Integer days, String formatPattern) {
>         Date date = new Date();
>         if (formatPattern == null) return StringUtils.EMPTY;
>         return format(plusOrMinusDays(date, days, 1), formatPattern);
>     }
>     
>     /**
>      * 加减天数
>      *
>      * @param date
>      * @param days
>      * @param type 0:加天数 1:减天数
>      * @return
>      */
>     private static Date plusOrMinusDays(Date date, Integer days, Integer type) {
>         if (null == date) return null;
>         days = null == days ? 0 : days;
>     
>         DateTime dateTime = new DateTime(date);
>         if (type == 0) {
>             dateTime = dateTime.plusDays(days);
>         } else {
>             dateTime = dateTime.minusDays(days);
>         }
>     
>         return dateTime.toDate();
>     }

**日期加/减分钟**

>     /**
>      * 日期加分钟
>      *
>      * @param date
>      * @param minutes
>      * @return
>      */
>     public static Date plusMinutes(Date date, Integer minutes) {
>         return plusOrMinusMinutes(date, minutes, 0);
>     }
>     
>     /**
>      * 日期减分钟
>      *
>      * @param date
>      * @param minutes
>      * @return
>      */
>     public static Date minusMinutes(Date date, Integer minutes) {
>         return plusOrMinusMinutes(date, minutes, 1);
>     }
>     
>     /**
>      * 加减分钟
>      *
>      * @param date
>      * @param minutes
>      * @param type    0:加分钟 1:减分钟
>      * @return
>      */
>     private static Date plusOrMinusMinutes(Date date, Integer minutes, Integer type) {
>         if (null == date) return null;
>         minutes = null == minutes ? 0 : minutes;
>     
>         DateTime dateTime = new DateTime(date);
>         if (type == 0) {
>             dateTime = dateTime.plusMinutes(minutes);
>         } else {
>             dateTime = dateTime.minusMinutes(minutes);
>         }
>     
>         return dateTime.toDate();
>     }

**判断是否在某一时间段内**

>     /**
>      * 判断target是否在开始和结束时间之间
>      *
>      * @param target
>      * @param startTime
>      * @param endTime
>      * @return
>      */
>     public static boolean isBetweenStartAndEndTime(Date target, Date startTime, Date endTime) {
>         if (null == target || null == startTime || null == endTime) {
>             return false;
>         }
>     
>         DateTime dateTime = new DateTime(target);
>         return dateTime.isAfter(startTime.getTime()) && dateTime.isBefore(endTime.getTime());
>     }

**判断当前是为第几周**

>     /**
>      * 获得当前是周几
>      * @return
>      */
>     public static Integer getWeekday(LocalDate currentDate) {
>         if (currentDate == null) {
>             currentDate = LocalDate.now();
>         }
>         Integer weekday = currentDate.getDayOfWeek().getValue();
>         return weekday;
>     }
> 
>     public static int compareDay( Date date1, Date date2) {
>         if ((date1 == null) || (date2 == null)) {
>             return 0;
>         }
>         long time1 = date1.getTime();
>         long time2 = date2.getTime();
>     
>         long margin = time1 - time2;
>     
>         int ret = (int) Math.floor(margin / 86400000.0D);
>     
>         return ret;
>     }

**判断两个日期之间的间隔**

>     public static int getDaysBetweenTwoDate(String firstString, String secondString) {
>         SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");
>         Date firstDate = null;
>         Date secondDate = null;
>         try {
>             firstDate = df.parse(firstString);
>             secondDate = df.parse(secondString);
>         } catch (Exception e) {
>             // 日期型字符串格式错误
>             System.out.println("日期型字符串格式错误");
>         }
>         return  (int) ((secondDate.getTime() - firstDate.getTime()) / (24 * 60 * 60 * 1000));
>     }

## 三 使用案例 ##

//定义时间格式
    String beginTime = DateTimeUtil.today("yyyy-MM-dd HH:mm:ss");
    //7200分钟
    Integer defBeginMinutes = 7200;
    //获取当前时间前7200分钟的时间
    beginTime=DateTimeUtil.dateToStr(DateTimeUtil.minusMinutes(DateTimeUtil.strToDate(beginTime), defBeginMinutes));