joda 的日常用法

小咪咪 2022-12-27 02:00 120阅读 0赞

DateTime currentDateTime = new DateTime();
    // 今天的零点
    DateTime dateTime = currentDateTime.withMillisOfDay(0)；
    // 昨天的零点
    DateTime dateTime = currentDateTime.withMillisOfDay(0).plusDays(-1);
    // 明天的零点
    DateTime dateTime = currentDateTime.withMillisOfDay(0).plusDays(1);
    // 这一年最后一天0点
    new DateTime().dayOfYear().withMaximumValue().withMillisOfDay(0)
    // 这一年第一天0点
    new DateTime().dayOfYear().withMinimumValue().withMillisOfDay(0)
    // 这个月最后一天0点
    new DateTime().dayOfMonth().withMaximumValue().withMillisOfDay(0)
    // 这个月月初0点
    new DateTime().dayOfMonth().withMinimumValue().withMillisOfDay(0)

DateTime currentDateTime = new DateTime();
    DateTime targetDateTime = new DateTime(2017,10,1,0,0,0);
    
    // 相差多少年
    int years = Years.yearsBetween(currentDateTime,targetDateTime).getYears();
    // 相差多少月
    int months = Months.monthsBetween(currentDateTime,targetDateTime).getMonths();
    // 距离国庆放假还有多少天，嘎嘎！
    int days = Days.daysBetween(currentDateTime,targetDateTime).getDays();
    // 相差多少小时
    int hours = Hours.hoursBetween(currentDateTime,targetDateTime).getHours();
    // 相差多少分钟
    int minutes = Minutes.minutesBetween(currentDateTime,targetDateTime).getMinutes();
    // 相差多少秒
    int seconds = Seconds.secondsBetween(currentDateTime,targetDateTime).getSeconds();
    // 相差多少周
    int weeks = Weeks.weeksBetween(currentDateTime,targetDateTime).getWeeks();

org.joda.time.DateTime;
    
    <dependency>
       <groupId>joda-time</groupId>
       <artifactId>joda-time</artifactId>
       <version>2.9.8</version>
    </dependency>
    1.初始化时间
    DateTime time = new DateTime(2018,4,23,23, 7,18,888);
    // 2018年4月23日23点7分18秒888毫秒  
    2.按格式输出时间(将DateTime格式转换为字符串)
     String time = dateTime.toString("yyyy-MM-dd hh:mm:ss.SSSa");
    小写hh是12小时制,大写HH是24小时制
    
    3.将字符串转换为DateTime格式
     DateTimeFormatter format = DateTimeFormat .forPattern("yyyy-MM-dd HH:mm:ss");  
                       
     DateTime dateTime = DateTime.parse("2018-4-23 23:12:16", format); 
    4.取得当前时间
    DateTime time= new DateTime();
    5.计算两个日期间隔的天数
     LocalDate start=new LocalDate(2018,4,23);    
     LocalDate end=new LocalDate(2019, 06, 16);    
     int days = Days.daysBetween(start, end).getDays(); 
    6.增加日期
          DateTime dateTime = DateTime.parse("2018-04-23");  
                    dateTime = dateTime1.plusDays(1);  
                    dateTime = dateTime1.plusHours(2);  
                    dateTime = dateTime1.plusMinutes(3);  
                    dateTime = dateTime1.plusMonths(4);  
                    dateTime = dateTime1.plusSeconds(5);  
                    dateTime = dateTime1.plusWeeks(6);  
                    dateTime = dateTime1.plusYears(7);  
    7.减少日期
      DateTime dateTime = DateTime.parse("2018-04-23");  
                    dateTime = dateTime1.minusMillis(1);  
                    dateTime = dateTime1.minusHours(1);  
                    dateTime = dateTime1.minusSeconds(1);;  
    8.判断是否闰月
    DateTime time = new DateTime();    
     org.joda.time.DateTime.Property month = time.monthOfYear();    
      System.out.println("是否闰月:" + month.isLeap());  
    9.DateTime与Date转换
    DateTime time = new DateTime(new Date());    
     Date date = time.toDate();    
     DateTime time2 = new DateTime(System.currentTimeMillis());    
     time2.getMillis();  
    10.DateTime与Calendar转换
    Calendar calendar = Calendar.getInstance();    
     dateTime = new DateTime(calendar);