import java.text.SimpleDateFormat;  import java.util.Calendar;  import java.util.Date;  import java.util.GregorianCalendar;    public class Testdouhao {      public static void main(String[] args) {          int dayu=-7;          for(int i=0;i>dayu;i--){          Date    date=new   Date();//取时间           Calendar   calendar   =   new   GregorianCalendar();           calendar.setTime(date);           calendar.add(calendar.DATE,i);//把日期往后增加一天.整数往后推,负数往前移动           date=calendar.getTime();   //这个时间就是日期往后推一天的结果      //    System.out.println(date);          SimpleDateFormat sFormat=new SimpleDateFormat("yyyyMMdd");          if(getWeekOfDate(date).equals("星期六") ){              --dayu;          }else if(getWeekOfDate(date).equals("星期日")){              --dayu;          }else{              System.out.println(sFormat.format(date));              }                    }      }      public static String getWeekOfDate(Date dt) {          String[] weekDays = {"星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六"};          Calendar cal = Calendar.getInstance();          cal.setTime(dt);            int w = cal.get(Calendar.DAY_OF_WEEK) - 1;          if (w < 0)          w = 0;            return weekDays[w];          }  }