java中日期比较大小

public static int checkSmsVerifyCodeTime(Date currentTime,date sendTime){

 int count=0;

 try{

  if(cuttentTime.before(sendTime) || cuttentTime.equls(sendTime)  ){count=1;}//当前时间小于等于发送时间

if(cuttentTime.after(sendTime)){count=2};//当前时间大于发送时间

}catch(exception e){e.printStackTrace();}

System.out.println(count);

}

 

public static void main(String [] args) throws ParseException{

  Date cuttentTime=new Date();

 String time="2014-08-12 00:00:00";

Date datetime=(new SimpleDateFormat("yyyy-MM-dd").parse(time);

Calendar cal=Calendar.getInstance();

cal.setTime(dateTime);

cal.add(Calendar.SECOND,60);//添加60秒

System.out.println(cal.getTime);

int count=checkSmsVerifyCodeTime(cuttentTime,cal.getTime);

if(count>1){

System.out.println("ok");

}else{

System.out.println("fiail");

}

 

}

 

 

 

Map转换JSON:

Map<String,Object> resultMap=new HashMap<String,Object>();

1.JSONUtils.toJSON(resultMap);

Sysotem.out.println(JSONUtils.toJSON(resultMap));

 

2.这个使用。

private JSONObject result;

result=JSONObject.fromObject(reusltMap);

Sysotem.out.println(result);

 

 

 

SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");//设置日期格式

Date start = df.parse(json.getString("begindate"));

Date end = df.parse(json.getString("enddate"));

Calendar startCalendar = Calendar.getInstance();

startCalendar.setTime(start);

 Calendar endCalendar = Calendar.getInstance();

 endCalendar.setTime(end);

  int F08=1;

 int F09=1;

 if(startCalendar.get(Calendar.DATE)==endCalendar.get(Calendar.DATE)){//按月算

 F09=MonthsBetween(start,end);

}else{//按天算

F08=daysBetween(start,end);

}

 

 

 

 /**  

     * 计算两个日期之间相差的天数  

     * @param smdate 较小的时间 

     * @param bdate  较大的时间 

     * @return 相差天数 

     * @throws ParseException  

     */    

    public static int daysBetween(Date smdate,Date bdate) throws ParseException    

    {    

        SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");  

        smdate=sdf.parse(sdf.format(smdate));  

        bdate=sdf.parse(sdf.format(bdate));  

        Calendar cal = Calendar.getInstance();    

        cal.setTime(smdate);    

        long time1 = cal.getTimeInMillis();                 

        cal.setTime(bdate);    

        long time2 = cal.getTimeInMillis();         

        long between_days=(time2-time1)/(1000*3600*24);  

            

       return Integer.parseInt(String.valueOf(between_days));           

    }

 

    /**  

     * 计算两个日期之间相差的月份  

     * @param smdate 较小的时间 

     * @param bdate  较大的时间 

     * @return 相差月份

     * @throws ParseException  

     */ 

    public static int MonthsBetween(Date startDate,Date endDate){

        Calendar c = Calendar.getInstance();

        c.setTime(endDate);

        int year1 = c.get(Calendar.YEAR);

        int month1 = c.get(Calendar.MONTH);

        c.setTime(startDate);

        int year2 = c.get(Calendar.YEAR);

        int month2 = c.get(Calendar.MONTH);

        int result;

        if(year1 == year2) {

            result = month1 - month2;

        } else {

            result = 12*(year1 - year2) + month1 - month2;

        }

        return result;

    }