可能的重复:
计算两个 Java 日期实例之间的差异
如何在 Java 中获取两个日期之间的天数?
最好的方法是什么?这是我得到的,但不是最好的:
public static ConcurrentHashMap<String, String> getWorkingDaysMap(int year,
int month, int day){
int totalworkingdays=0,noofdays=0;
String nameofday = "";
ConcurrentHashMap<String,String> workingDaysMap =
new ConcurrentHashMap<String,String>();
Map<String,String> holyDayMap = new LinkedHashMap<String,String>();
noofdays = findNoOfDays(year,month,day);
for (int i = 1; i <= noofdays; i++) {
Date date = (new GregorianCalendar(year,month - 1, i)).getTime();
// year,month,day
SimpleDateFormat f = new SimpleDateFormat("EEEE");
nameofday = f.format(date);
String daystr="";
String monthstr="";
if(i<10)daystr="0";
if(month<10)monthstr="0";
String formatedDate = daystr+i+"/"+monthstr+month+"/"+year;
if(!(nameofday.equals("Saturday") || nameofday.equals("Sunday"))){
workingDaysMap.put(formatedDate,formatedDate);
totalworkingdays++;
}
}
return workingDaysMap;
}
public static int findNoOfDays(int year, int month, int day) {
Calendar calendar = Calendar.getInstance();
calendar.set(year, month - 1, day);
int days = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
return days;
}