获取当月多少天

//获取当前年月
public int getDays() {
    Calendar calendar = Calendar.getInstance(Locale.getDefault());
    int year = calendar.get(Calendar.YEAR);
    int month = calendar.get(Calendar.MONTH)+1;

    int days = 0;
    if (month != 2) {
        switch (month) {
            case 1:
            case 3:
            case 5:
            case 7:
            case 8:
            case 10:
            case 12:
                days = 31;
                break;
            case 4:
            case 6:
            case 9:
            case 11:
                days = 30;
        }
    } else {
        // 闰年
        if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0)
            days = 29;
        else
            days = 28;
    }
    System.out.println("当月有" + days + "天！");
    return days;
}