java - 使用方法时日历给出错误的年份

Question

我必须找出测试人员类(class)中表格中的出生日期的年龄。这意味着我必须获取当前日期到所选特定日期的日期。而且，我将该方法放在主类中。错误是我一直为插入的所有变量获取 2018。从我的代码(并非全部都在此处)来看，第一个变量应该是 58，而不是 2018。

这是代码。

public static int ageMeth(String dob) {
        dob.split("/");
        int years = 0;
        String tempDate = "";
        boolean month = true;
        if (month) {
            // gets the month converts
            int x = Integer.parseInt(dob.valueOf(0));
            int y = Integer.parseInt(dob.valueOf(1));
            String xy = Integer.toString(x, y);
            int xyNum = Integer.parseInt(xy);
            LocalDateTime date = LocalDateTime.now();
            tempDate = date.toString();
            int p = Integer.parseInt(tempDate.valueOf(5));
            int i = Integer.parseInt(tempDate.valueOf(6));
            String pi = Integer.toString(p, i);
            int piNum = Integer.parseInt(pi);


            // the days
            int x2 = Integer.parseInt(dob.valueOf(2));
            int y2 = Integer.parseInt(dob.valueOf(3));
            String xy2 = Integer.toString(x2, y2);
            int xyNum2 = Integer.parseInt(xy2);

            int p2 = Integer.parseInt(tempDate.valueOf(8));
            int i2 = Integer.parseInt(tempDate.valueOf(9));
            String pi2 = Integer.toString(p2, i2);
            int piNum2 = Integer.parseInt(pi2);


            // the year
            int x3 = Integer.parseInt(dob.valueOf(4));
            int y3 = Integer.parseInt(dob.valueOf(5));
            int xx3 = Integer.parseInt(dob.valueOf(6));
            int yy3 = Integer.parseInt(dob.valueOf(7));
            String xy3 = Integer.toString(x3, y3);
            String xxyy3 = Integer.toString(xx3, yy3);
            int xyNum3 = Integer.parseInt(xy2);
            int xxyyNum3 = Integer.parseInt(xxyy3);

            int p3 = Integer.parseInt(tempDate.valueOf(8));
            int i3 = Integer.parseInt(tempDate.valueOf(9));
            String pi3 = Integer.toString(p3, i3);
            int piNum3 = Integer.parseInt(pi3);

            // the main variables
            int newMonth = piNum - xyNum;
            int newDay = piNum2 - xyNum2;
            int newYear = piNum3 - (xyNum3 + xxyyNum3);

            LocalDate today = LocalDate.now();
            LocalDate birthday = LocalDate.of(newYear, newMonth, newDay);
            Period per = Period.between(birthday, today);
            years = per.getYears();
        } 
        return years;
}

Answer 1

要根据传入的 dob 查找年龄，您可以使用:

public static int ageMeth(String dob) {
    return Period.between(LocalDate.parse(dob, DateTimeFormatter.ofPattern("MM/dd/yyyy")), 
                          LocalDate.now()).getYears();
}