按月匹配天数

if(monthValue==1||monthValue==3||monthValue==5||monthValue==7||monthValue==8||monthValue==10||monthValue==12)   {
                dayvalue = 31
            }else if(monthValue==4||monthValue==6||monthValue==11||monthValue==9)    {
                dayvalue = 30
            }else if(monthValue==2){

                if(yearValue%4==0 && (yearValue%4 !=0 || yearValue%400==0)){ //闰年
                    dayvalue = 29
                }else{
                    dayvalue = 28
                }

            }

按月匹配天数

原文：http://www.cnblogs.com/afei-happy/p/4019553.html