DateTime Usagejoda DateTime Usage use DateTime to transform

依赖

<dependency>
    <groupId>joda-time</groupId>
    <artifactId>joda-time</artifactId>
    <version>2.10.10</version>
</dependency>

用法

```
@Test
    public void testdatetime() {
        long enterTime = 1656671978000L;
        DateTime start = new DateTime(enterTime);
        DateTime end = new DateTime(System.currentTimeMillis());
//        获得今天是当月的第几天
        int startMonth = start.getDayOfMonth();
        int endMonth = end.getDayOfMonth();
//        此时此刻的DateTime
        DateTime nowTime = new DateTime();
        int currentMonthDay = new DateTime().plusMonths(1).withDayOfMonth(1).minusDays(1).getDayOfMonth();
//        下个月的这一天
        DateTime nextDate = new DateTime().plusMonths(1);
//        下下个月的这一天
        DateTime nextDate2 = new DateTime().plusMonths(2);
//        设置成当月的第一天
        DateTime nextDate3 = nextDate2.withDayOfMonth(1);
//        设置成当月的第二天
        DateTime nextDate4 = nextDate2.withDayOfMonth(2);
//        当年的第几个月
        int monthOfYear = nextDate4.getMonthOfYear();
        System.out.println(start.toString()+end.toString());
    }
```