时间越界的错误

public void stat(Date startDate,Date endDate,String shopNick) throws Exception{
long days = DateUtil.diffdates(startDate, endDate);
for(int j=0;j<=days;j++){
Date curDate = new Date(startDate.getTime() + j*(24*3600*1000));
logger.info("[订正数据]订正"+shopNick+",日期:"+DateUtil.formatTime(curDate, DateUtil.DEFAULT_DATE_FORMAT));
saleAnalyzeDao.stat(DateUtil.parasDateYMD(curDate), shopNick);
}
}


测试出来的时间就是不正确.中间的日期都乱了.
因为j*(24*3600*1000)越界了.
导致了错误.

这段代码修改为
j*(24*3600*1000L)
或者
TimerUnit.DATE.toMillis(j)
或者调用这个日期增加
public static java.util.Date addDate(java.util.Date date, int day) {
if (null == date) {
return null;
}
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.set(Calendar.DAY_OF_MONTH, calendar.get(Calendar.DAY_OF_MONTH) + day);
return calendar.getTime();
}