简介
Joda是一个java的处理时间类库,需要jdk8的支持,是java.time (JSR-310).
来自
今天在无意中学习spring的文档(9.6.2 Annotation-driven Formatting)的Formatter的的源码的时候,发现这个时间类库,由于spring某些功能也依赖这个类库,所以我决定瞧瞧是怎么回事
功能
- 直接跟当前时间比较
isAfterNow/isBeforeNow/isEqualNow
- 返回Date/Calendar
toDate/toCalendar
- 时间计算,加年/月/日/时分秒
plusYears/plusMonths/plusDays
- 时区设置
withZone
常用函数
dt.getEra();dt.getYear();//获取当前年dt.getWeekyear();dt.getCenturyOfEra();dt.getYearOfEra();//世纪年dt.getYearOfCentury();dt.getMonthOfYear();//获取月份dt.getWeekOfWeekyear();//这周是今年的第几周dt.getDayOfYear();//这天是今年的第几天dt.getDayOfMonth();//月份的多少好dt.getDayOfWeek();//一个星期的第几天
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依赖
<dependency><groupId>joda-time</groupId><artifactId>joda-time</artifactId><version>2.9.4</version>
</dependency>
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example code
JodaTimeTest.java
package com.carl.spring.hello.bean;import org.joda.time.DateTime;
import org.joda.time.Duration;
import org.joda.time.Period;
import org.joda.time.format.DateTimeFormatter;
import org.joda.time.format.DateTimeFormatterBuilder;
import org.junit.Test;import java.util.Date;
import java.util.Locale;/*** @author Carl* @date 2016/9/2*/
public class JodaTimeTest {
@Testpublic void dateTimeTest() {//2016/9/2//当前时间java.util.Date juDate = new Date();//如果无参,也默认是当前时间的DateTime dt = new DateTime(juDate);show(dt);}@Testpublic void dateTimeChange() {DateTime dt = new DateTime();//把年改为2000年的DateTime year2000 = dt.withYear(2000);//时间加两个小时DateTime twoHoursLater = dt.plusHours(2);show(dt);//2016-9-2 0:16show(year2000);//2000-9-2 0:16show(twoHoursLater);//2016-9-2 2:16}@Testpublic void dateTimeText() {DateTime dt = new DateTime();String monthName = dt.monthOfYear().getAsText();//根据地区获取TextString frenchShortName = dt.monthOfYear().getAsShortText(Locale.CHINA);boolean isLeapYear = dt.year().isLeap();DateTime rounded = dt.dayOfMonth().roundFloorCopy();System.out.println(monthName);System.out.println(frenchShortName);System.out.println(isLeapYear);//月份的最后一天System.out.println(dt.dayOfMonth().getMaximumValue());show(rounded);}@Testpublic void dateTimeArgs() {//实例就能够确定年月日时分秒DateTime dt = new DateTime(2005, 3, 26, 12, 0, 0, 0);//这里能够进行时间的计算,plus就是加了,周期肯定是那个接口的,里面肯定也有年月日时分秒DateTime plusPeriod = dt.plus(Period.days(1));DateTime plusDuration = dt.plus(new Duration(24L*60L*60L*1000L));show(dt);//2005-3-26 12:0//减一天show(dt.plusDays(-1));//2005-3-25 12:0show(plusPeriod);//2005-3-27 12:0show(plusDuration);//2005-3-27 12:0}@Testpublic void dataTimeFormat() {DateTimeFormatter fmt = new DateTimeFormatterBuilder().appendDayOfMonth(1).appendLiteral('-').appendMonthOfYearShortText().appendLiteral('-').appendTwoDigitYear(1956) // pivot = 1956.toFormatter();DateTime dt = new DateTime();System.out.println(dt.toString(fmt));//2-九月-16}private void show(DateTime dateTime) {System.out.println(dateTime.getYear() + "-" + dateTime.getMonthOfYear() + "-" + dateTime.getDayOfMonth() + " " + dateTime.getHourOfDay() + ":" + dateTime.getMinuteOfHour());}
}