一、一天中的开始时间

 LocalDateTime date = LocalDateTime.now();
// 获取一天的开始时间LocalDateTime startOfTheDay = LocalDateTime.of(date.toLocalDate(), LocalTime.MIN);System.out.println("startOfTheDay = " + startOfTheDay);

二、一天中的结束时间

// 获取一天的结束时间LocalDateTime date = LocalDateTime.now();LocalDateTime endOfTheDay = LocalDateTime.of(date.toLocalDate(), LocalTime.MAX);System.out.println("endOfTheDay = " + endOfTheDay);

三、mybatis模糊查询时间

LocalDateTime dateT = LocalDateTime.now();
// 获取一天的开始时间
LocalDateTime startOfTheDay = LocalDateTime.of(dateT.toLocalDate(), LocalTime.MIN);
LzDonationResearchExample example = new LzDonationResearchExample();
LzDonationResearchExample.Criteria criteria = example.createCriteria();
example.or().andAddTimeGreaterThanOrEqualTo(startOfTheDay);