java 8 LocalDate 与 LocalDateTime 时间类的简单应用

快来打我* 2022-05-12 02:20 206阅读 0赞

** 废话不多说，直接贴代码实例**

@Test
    	public void testTime() {
    		//获取当前的时间
    		LocalDate now = LocalDate.now();
    		System.out.println(now);//结果：2018-09-13
    		
    		//指定月份，获取4月份的今天
    		LocalDate withMonth = LocalDate.now().withMonth(4);
    		System.out.println(withMonth);//2018-04-13
    		//指定年份
    		LocalDate withYear = LocalDate.now().withYear(2017);
    		System.out.println(withYear);//2017-09-13
    		
    		//指定月份的多少号
    		LocalDate withDayOfMonth = LocalDate.now().withDayOfMonth(30);
    		System.out.println(withDayOfMonth);//2017-09-30
    		
    		//获取某月的第一天
    		LocalDate withDayOfMonth2 = LocalDate.now().withMonth(10).withDayOfMonth(1);
    		System.out.println(withDayOfMonth2);//2018-10-01
    		
    		//获取某月的最后一天
    		LocalDate withDayOfMonth3 = LocalDate.now().withMonth(10);
    		int lengthOfMonth = withDayOfMonth3.lengthOfMonth();
    		LocalDate withDayOfMonth4 = withDayOfMonth3.withDayOfMonth(lengthOfMonth);
    		System.out.println(withDayOfMonth4);//2018-10-31
    		
    		//日期格式化
    		String format = LocalDate.now().format(DateTimeFormatter.ofPattern("yyyy年MM月"));
    		System.out.println(format);//2018年09月
    		
    		//月份增加两个月
    		LocalDate plusMonths = LocalDate.now().plusMonths(2);
    		System.out.println(plusMonths);//2018-11-13
    		
    		//年增加
    		LocalDate plusYears = LocalDate.now().plusYears(5);
    		System.out.println(plusYears);//2023-09-13
    		
    		
    		
    		//获取当前的时间
    		LocalDateTime atStartOfDay = LocalDateTime.now();
    		System.out.println(atStartOfDay);//结果：2018-09-13T15:33:32.653
    		
    		/*
    		 * LocalDateTime 与 LocalDate的很多方法基本一致，这里就不一一掩饰，感兴趣的朋友可以自    
              己探索
    		 */
    		
    	}

## LocalDateTime 与 LocalDate的很多方法基本一致，这里就不一一演示啦，感兴趣的朋友可以自己探索  ##