java8新特性_19_新时期与日期API_时间矫正器

//TemporalAdjuster 时间矫正器
    @Test
    public void test1(){
        LocalDateTime ldt = LocalDateTime.now();
        System.out.println(ldt);

        //日期变为10号
        LocalDateTime ldt2 = ldt.withDayOfMonth(10);
        System.out.println(ldt2);

        //下一个星期日
        LocalDateTime ldt3 = ldt.with(TemporalAdjusters.next(DayOfWeek.SUNDAY));
        System.out.println(ldt3);

        //lambda表达式，自定义转换器
        LocalDateTime ldt4 = ldt.with(l->{
            LocalDateTime ldt5 = (LocalDateTime) l;
            DayOfWeek dow = ldt5.getDayOfWeek();
            if(dow.equals(DayOfWeek.FRIDAY)){
                return ldt5.plusDays(3);
            }else if(dow.equals(DayOfWeek.SATURDAY)){
                return ldt5.plusDays(2);
            }else{
                return ldt5.plusDays(1);
            }
        });
        System.out.println(ldt4);
    }