根据当前日期获取本周日期

/**
     * 根据当前日期获取本周所有日期
     * @return
     */
    public static ArrayList<String> dateList() {
    Calendar cal = Calendar.getInstance(); 
    ArrayList<String> list = new  ArrayList<String>();
    int date = cal.get(Calendar.DAY_OF_MONTH); 
    int n = cal.get(Calendar.DAY_OF_WEEK);
    if (n == 1) { n = 7; } else { n = n - 1; } 
    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); 
    for (int i = 1; i <= 7; i++) {
    cal.set(Calendar.DAY_OF_MONTH, date + i - n); 
    list.add(i-1, sdf.format(cal.getTime()));
    } 
    return  list;
    }