作為一個工具類整理出來，方便以後使用

    public static Date getNextDay(Date date) { 
		if(date == null){
			System.out.println("入參為空");
			return null;
		}
        Calendar calendar = Calendar.getInstance();  
        calendar.setTime(date);  
        
        //calendar.add(Calendar.DAY_OF_MONTH, +1);//明天
        //calendar.add(Calendar.DAY_OF_MONTH, 0);//今天
        calendar.add(Calendar.DAY_OF_MONTH, -1);//昨天
        return calendar.getTime();  
    }