据第七步得到的值,怎么格式化输出这个月的日历?

import java.util.Scanner;
//1.输出提示语句,接受用户输入的年月.
public class HomeWork {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.println("请输入一个年份");
int year = input.nextInt();
System.out.println("请输入一个月份");
int month = input.nextInt();
outPut(year, month);

    }

    //2.判断用户输入的年份,判断是否是闰年.
    public static boolean isLeapYear(int year) {
        if ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0)) {
            return true;
        } else {
            return false;
        }
    }

    //3.根据用户输入的月份来判断月的天数.
    public static int month(int month, int year) {
        int day = 0;
        if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12) {
            day = 31;
        } else if (month == 4 || month == 6 || month == 9 || month == 11) {
            day = 30;
        } else if (month == 2) {
            if (isLeapYear(year)) {
                day = 29;
            } else {
                day = 28;
            }
        }
        return day;
    }

    //4.用循环计算用户输入的年份距离1900年1月1日的总天数.
    public static int yearDay(int year) {
        int yearday = 0;
        for (int i = 1900; i < year; i++) {
            if (isLeapYear(i)) {
                yearday = yearday + 366;
            } else {
                yearday = yearday + 365;
            }
        }
        return yearday;
    }

    //5.用循环计算用户输入的月份距输入的年份的1月1日共有多少天.
    public static int monthDay(int month, int year) {
        int monthday = 0;
        for (int n = 1; n < month; n++) {
            if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12) {
                monthday = monthday + 31;
            }
            if (month == 4 || month == 6 || month == 9 || month == 11) {
                monthday = monthday + 30;
            }
            if (month == 2) {
                if (isLeapYear(year)) {
                    monthday = monthday + 29;
                } else {
                    monthday = monthday + 28;
                }
            }
        }
        return monthday;
    }

    //6.相加第四步与第五步的天数,得到总天数.
    public static int sumDays(int month, int year) {
        int yearday = yearDay(year);
        int monthday = monthDay(month, year);
        int sum = yearday + monthday;
        return sum;
    }

    //7.用(总天数+1)%7来计算输入的月的第一天的星期数.
    public static int week(int month, int year) {
        int week = (sumDays(month, year) + 1) % 7;
        return week;
    }

    //8.据第七步得到的值,格式化输出这个月的日历.

试试java的calendar类