JAVA 前端传年份,与当前时间相加,获取过期时间

朱雀 2022-03-15 08:42 258阅读 0赞

public static void main(String[] args){
        SimpleDateFormat formatn = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        Date datee = new Date();  //当前时间
        Calendar cal = Calendar.getInstance();
        cal.add(Calendar.YEAR,1);  //这个1 可以在业务中替换成前端传过来的值
        System.out.println(formatn.format(cal.getTime()));  //打印相加的时间
    	
    	//时间比较  当前时间与过期时间比较 ,
    	SimpleDateFormat sdfd = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    
        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd ");//定义格式，不显示毫秒
    
        Date date = new Date();
    
        String datetime = String.valueOf(df.format(date.getTime()));
    
    
    
        Calendar cal = Calendar.getInstance();
        cal.add(Calendar.DAY_OF_MONTH,15); //日
    
        Date  caen = cal.getTime();
        String ser = String.valueOf(df.format(caen.getTime()));
    
        Date  caen1 = new Date();
        String sere = String.valueOf(df.format(caen1.getTime()));
    
    
        System.out.println(sdfd.format(date));
        System.out.println(df.format(date));
        System.out.println(df.format(caen));
    
        System.out.println(df.format(caen1));
    
    
    
    
        System.out.println(datetime);
        System.out.println(ser);
    
    
        if(datetime.equals(ser)  || datetime.equals(sere)){
            System.out.println("等于");
        }else{
            System.out.println("不等于");
        }
    
    
    }
    }

调对方接口，对方传的值没有说明有效期，只返回了一个有效期，那么用下面这个方法可以处理

public Long getDate (String expiredDate) throws ParseException {
    		Date date = new Date();
    		//当前时间
    		String currentData = formatn.format(date);
    
    		Date expired = df.parse(expiredDate);
    		Date current = df.parse(currentData);
    
    		//这样得到的差值会存在微百秒级别,问题不太大
    		long diff = expired.getTime() - current.getTime();
    		long days = diff / (1000 * 60 * 60 * 24);
    		long hours = (diff-days*(1000 * 60 * 60 * 24))/(1000* 60 * 60);
    		long minutes = (diff-days*(1000 * 60 * 60 * 24)-hours*(1000* 60 * 60))/(1000* 60);
    	  System.out.println(""+days+"天"+hours+"小时"+minutes+"分");
    		return  minutes;
    	}