Calendar calendar = Calendar.getInstance();
//设置当天秒为0
calendar.set(Calendar.SECOND,0);
//设置当分钟秒为0
calendar.set(Calendar.MINUTE,0);
//设置当天小时为0,采用24小时制
calendar.set(Calendar.HOUR_OF_DAY,0);
//设置当毫秒秒为0
calendar.set(Calendar.MILLISECOND, 0);
//将当前日历日期(月份中的天数)增加1
calendar.add(Calendar.DAY_OF_MONTH,1);
//采用Hutool工具类 将日期可视化输出
String format = DateUtil.format(calendar.getTime(), "yyyy-MM-dd HH:mm:ss");
System.out.println(format);