java通过年月得到该月每一天的日期

public static List<String> getDayByMonth(int yearParam,int monthParam){
List<String> list = new ArrayList<>();
Calendar calendar = Calendar.getInstance(Locale.CHINA);
calendar.set(yearParam, monthParam-1, 1);
int year = calendar.get(Calendar.YEAR);//年份
int month = calendar.get(Calendar.MONTH) + 1;//月份
int day = calendar.getActualMaximum(Calendar.DATE);
for (int i = 1; i <= day; i++) {
String date=null;
if(month<10 && i<10){
date = String.valueOf(year)+"-0"+month+"-0"+i;
}
if(month<10 && i>=10){
date = String.valueOf(year)+"-0"+month+"-"+i;
}
if(month>=10 && i<10){
date = String.valueOf(year)+"-"+month+"-0"+i;
}
if(month>=10 && i>=10){
date = String.valueOf(year)+"-"+month+"-"+i;
}

list.add(date);
}
return list;
}