JDK8 LocalDate獲取月初月末

1.獲取月初月末

public static void main(String[] args) {
        String count_date="2020-02-05";
        //獲取月初
        LocalDate monthOfFirstDate=LocalDate.parse(count_date,
                DateTimeFormatter.ofPattern("yyyy-MM-dd")).with(TemporalAdjusters.firstDayOfMonth());
        //獲取月末
        LocalDate monthOfLastDate=LocalDate.parse(count_date,
                DateTimeFormatter.ofPattern("yyyy-MM-dd")).with(TemporalAdjusters.lastDayOfMonth());
        TemporalAdjusters.firstDayOfMonth();
        
        System.out.println(monthOfFirstDate);
        System.out.println(monthOfLastDate);
    }

輸出:
2020-02-01
2020-02-29