Java 8新增的日期类LocalDate和LocalDateTime

前言

今天博主将为大家分享Java 8新增的日期类LocalDate和LocalDateTime，不喜勿喷，如有异议欢迎讨论！

来一段简单的代码：

package com.test;

import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

/**
 * 
 * @Description: Java 8新增的日期类LocalDate和LocalDateTime
 * @ClassName: LocalDateTimeTest.java
 * @author ChenYongJia
 * @Date 2019年5月26日 晚上23:25
 * @Email chen87647213@163.com
 */
public class LocalDateTimeTest {

	LocalDateTime dateTime = LocalDateTime.now();

	// 年月日
	int year = dateTime.getYear();
	int month = dateTime.getMonthValue();
	int days = dateTime.getDayOfMonth();

	// 时分秒
	int hour = dateTime.getHour();
	int minute = dateTime.getMinute();
	int second = dateTime.getSecond();

	// 字符串与日期之间的转换，DateTimeFormatter是线程安全的
	DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
	
	String dateTimeStr = formatter.format(dateTime);
	
	LocalDateTime dateTimeFormat = LocalDateTime.parse(dateTimeStr, formatter);

	public static void main(String[] args) {
		
		// LocalDate 只有年月日，没有时分秒
		LocalDate date = LocalDate.now(); // 2019-05-28我写代码时的日期

		// 年月日
		int year = date.getYear(); // 2019
		int month = date.getMonthValue(); // 05
		int days = date.getDayOfMonth(); // 28

		// 加
		LocalDate dateForOneDaysAfter = date.plusDays(1);
		System.out.println("dateForOneDaysAfter=================>" + dateForOneDaysAfter);
		System.out.println("---------------------------------------------------------");
		LocalDate dateForOneWeeksAfter = date.plusWeeks(1);
		System.out.println("dateForOneWeeksAfter=================>" + dateForOneWeeksAfter);
		System.out.println("---------------------------------------------------------");
		LocalDate dateForOneMonthsAfter = date.plusMonths(1);
		System.out.println("dateForOneMonthsAfter=================>" + dateForOneMonthsAfter);
		System.out.println("---------------------------------------------------------");
		// 减
		LocalDate dateForOneDaysBefore = date.minusDays(1);
		System.out.println("dateForOneDaysBefore=================>" + dateForOneDaysBefore);
		System.out.println("---------------------------------------------------------");
		LocalDate dateForOneYearsBefore = date.minusYears(1);
		System.out.println("dateForOneYearsBefore=================>" + dateForOneYearsBefore);
		System.out.println("---------------------------------------------------------");

		// 判断是否闰年
		boolean isLeapYear = date.isLeapYear();
		System.out.println("isLeapYear=================>" + isLeapYear);
		
	}

}
控制台输出如下：
dateForOneDaysAfter=================>2019-05-29
---------------------------------------------------------
dateForOneWeeksAfter=================>2019-06-04
---------------------------------------------------------
dateForOneMonthsAfter=================>2019-06-28
---------------------------------------------------------
dateForOneDaysBefore=================>2019-05-27
---------------------------------------------------------
dateForOneYearsBefore=================>2018-05-28
---------------------------------------------------------
isLeapYear=================>false

到这里Java系列：Java 8新增的日期类LocalDate和LocalDateTime，分享完毕了，快去试试吧！下一波将分享=>Java8 时间处理类的使用实践（LocalDate…）和Java8中的LocalDateTime工具类！