Java获得当前日期是星期几的代码
这段代码没有根据基姆拉尔森公式进行计算，而是直接使用的java内置的日期库实现
代码转自：http://blog.duplicatedcode.com/
//从 yyyyMMdd 返回 星期几
public static String getDayAndWeek(String day){
if(day.length()<8){
return day;
}
Calendar c = new GregorianCalendar();
DateFormatSymbols dfs = new DateFormatSymbols();
String[] weeks = dfs.getWeekdays();
int year = Integer.parseInt(day.substring(0,4));
int month =Integer.parseInt( day.substring(4,6));
int day_ = Integer.parseInt( day.substring(6,8));
c.set(year, month-1, day_); //Calendar的月从0-11，所以4月是3.
c.get(Calendar.DAY_OF_WEEK);
String week = weeks[c.get(Calendar.DAY_OF_WEEK)];
week = "星期"+week.substring(2);
day = day_+ "("+week+")";
return day;
}
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