LocalDate工具类的使用

• 1.将YYYY-MM-DD 字符串日期转为Localdate

DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");
// 注册日期
LocalDate regTime = LocalDate.parse(regStringTime, dateTimeFormatter);

• 2.获取月份的第一天日期和最后一天日期

LocalDate today = LocalDate.now();
        //本月的第一天
        LocalDate firstDay = LocalDate.of(today.getYear(), today.getMonth(), 1);
        //本月的最后一天
        LocalDate lastDay = today.with(TemporalAdjusters.lastDayOfMonth());
        System.out.println("本月的第一天:" + firstDay.toString() + " 00:00:00");
        System.out.println("本月的最后一天:" + lastDay.toString() + " 23:59:59");