public class Demo4 {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Demo4 demo = new Demo4();
demo.show(1900,3);
}
//定义一个工具方法：判断平年还是闰年
public boolean isLeapYear(int year){
if(year % 400 == 0 || (year % 4==0 && year % 100 != 0)){
return true;
}
return false;
}
//计算输入年份下，月份的总天数 1900
public int getTotalDateFrom(int year , int month){
//1.定年份的总天数
int totalDate = 0;//1900到你输入的年份的总天数 2016 1900 - 1903 = 3
for(int i= 1900 ; i < year ;i++){
if(isLeapYear(i)){ // 闰年
totalDate += 366;
}else {
totalDate += 365;
}
}
//2.计算月份的天数
for(int i = 1 ; i< month ;i++){
totalDate += getDayOfMonth(year, i);
}
return totalDate;
}
public int getDayOfMonth(int year , int month){
switch (month) {
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12:
return 31;
case 4:
case 6:
case 9:
case 11:
return 30;
case 2:
if(isLeapYear(year)){
return 29;
}else {
return 28;
}
default:
return 30;
}
}
public int printSpace(int year , int month){
return getTotalDateFrom(year, month) % 7;
}
public void print(int year , int month){
int countSpac = printSpace(year, month) + 1; // 空格的个数
int count = 0; //定义一个计数
for(int i = 1; i<=countSpac; i++){
count++;
System.out.print("\t");
}
//2.打印日期
for(int i = 1 ; i<=getDayOfMonth(year, month);i++){
if(count % 7 == 0){
System.out.println();
}
count++;
System.out.print(i+"\t");
}
}
public void show(int year , int month){
System.out.println("******************"+year+"****"+month+"***************");
System.out.println("======================================================");
System.out.println("日\t一\t二\t三\t四\t五\t六");
System.out.println("======================================================");
print(year, month);
System.out.println();
}
}