java判断日期与星期，java判断日期星期,import java.

java判断日期与星期，java判断日期星期,import java.

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];        }}