需求：获取当天日期到当前访问的时间段，如当日是2024-02-19，那么此刻访问，日期期间就是2024-02-19 00:00:00到2024-02-19 16:58:00
代码如下：

			Date date=new Date();String currentDate=date2Str(date,"yyyy-MM-dd");String currentTime=date2Str(date,"yyyy-MM-dd HH:mm:ss");String startTime=currentDate+" "+ "00:00:00";String endTime=currentTime;//--------------------------------------------------------------
public String date2Str(Date date, String format) {if ((format == null) || format.equals("")) {format = "yyyy-MM-dd HH:mm:ss";}SimpleDateFormat sdf = new SimpleDateFormat(format);if (date != null) {return sdf.format(date);}return "";}

2.获取当日时间段同理，代码如下：

			Date date=new Date();String currentDate=date2Str(date,"yyyy-MM-dd");String startTime=currentDate+" "+ "00:00:00";String endTime=currentDate+" "+ "23:59:59";//--------------------------------------------------------------
public String date2Str(Date date, String format) {if ((format == null) || format.equals("")) {format = "yyyy-MM-dd HH:mm:ss";}SimpleDateFormat sdf = new SimpleDateFormat(format);if (date != null) {return sdf.format(date);}return "";}