用Java写的，基于若依的玩意，有需要拿去用或优化一下
首先建立返回的实体对象和周期枚举
public class ChartLine { private Date beginTime; private Date endTime; private String lineName; }
public enum SplitWay { /** * 天 */ Day(0), /** * 周 */ Week(1), /** * 月 */ Month(2), /** * 年 */ Year(3), /** * 季度 */ Quarter(4), /** * 半年 */ HalfY(5); // 成员变量 private int value; // 构造方法 SplitWay(int value) { this.value = value; } // get set 方法 public int getValue() { return this.value; } public SplitWay setValue(int value) { for (SplitWay way:SplitWay.values()){ if(way.getValue()==value){ return way; } } return SplitWay.Day; } }
几个常用的时间格式化规则
public static String YYYY = "yyyy"; public static String YY = "yy"; public static String YYYY_MM = "yyyy-MM"; public static String CN_SHORT_YYYY_MM = "yy年M月"; public static String YYYY_MM_DD = "yyyy-MM-dd"; public static String YYYYMMDDHHMMSS = "yyyyMMddHHmmss"; public static String YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss";
核心代码，私有的，DateUtils是当前Java Class，用过若依的都懂的，这里也只是提供一个算法。我个人其实比较喜欢if-else，想改造成switch-case也行
private static ChartLine getDateOne(Date begin, Date end, SplitWay splitWay){ if(end.after(begin)){ ChartLine dateRef=new ChartLine(); dateRef.setBeginTime(begin);; Date beginDate= DateUtils.dateTime(DateUtils.YYYY_MM_DD,DateUtils.parseDateToStr(DateUtils.YYYY_MM_DD,begin)); Calendar CAL = Calendar.getInstance(); CAL.setFirstDayOfWeek(Calendar.MONDAY); CAL.setTime(beginDate); Date refEnd=begin; if(splitWay.equals(SplitWay.Day)){ if(beginDate.equals(refEnd)){ refEnd=DateUtils.addDays(begin,1); }else{ refEnd=DateUtils.addDays(beginDate,1); } if(refEnd.after(end))refEnd=end; dateRef.setLineName(DateUtils.parseDateToStr(DateUtils.YYYY_MM_DD,begin)); }else if(splitWay.equals(SplitWay.Week)){ Integer beginWeek=CAL.get(Calendar.DAY_OF_WEEK); if(beginDate.equals(refEnd)&&beginWeek==CAL.getFirstDayOfWeek()){ refEnd=DateUtils.addDays(begin,7); }else{ if(beginWeek<CAL.getFirstDayOfWeek()) { refEnd = DateUtils.addDays(beginDate, 1); }else{ refEnd = DateUtils.addDays(beginDate, 9-beginWeek); } } if(refEnd.after(end))refEnd=end; dateRef.setLineName(DateUtils.parseDateToStr(DateUtils.CN_SHORT_YYYY_MM,begin)+"第"+CAL.get(Calendar.WEEK_OF_MONTH)+"周"); }else if(splitWay.equals(SplitWay.Month)){ Integer beginMonth=CAL.get(Calendar.DATE); if(beginDate.equals(refEnd)&&beginMonth==1){ refEnd=DateUtils.addMonths(begin,1); }else{ String endStr=DateUtils.parseDateToStr(DateUtils.YYYY_MM,DateUtils.addMonths(beginDate, 1))+"-01"; refEnd=DateUtils.dateTime(DateUtils.YYYY_MM_DD,endStr); } if(refEnd.after(end))refEnd=end; dateRef.setLineName(DateUtils.parseDateToStr(DateUtils.CN_SHORT_YYYY_MM,begin)); }else if(splitWay.equals(SplitWay.Year)){ Integer beginMonth=CAL.get(Calendar.DATE); Integer beginYear=CAL.get(Calendar.MONTH)+1; if(beginDate.equals(refEnd)&&beginMonth==1&&beginYear==1){ refEnd=DateUtils.addYears(begin,1); }else{ String endStr=DateUtils.parseDateToStr(DateUtils.YYYY,DateUtils.addYears(beginDate, 1))+"-01-01"; refEnd=DateUtils.dateTime(DateUtils.YYYY_MM_DD,endStr); } if(refEnd.after(end))refEnd=end; dateRef.setLineName(DateUtils.parseDateToStr(DateUtils.YYYY,begin)+"年"); }else if(splitWay.equals(SplitWay.Quarter)){ Integer beginMonth=CAL.get(Calendar.DATE); Integer beginYear=CAL.get(Calendar.MONTH)+1; List<Integer> beginYears=new ArrayList<>(); beginYears.add(1); beginYears.add(4); beginYears.add(7); beginYears.add(10); if(beginDate.equals(refEnd)&&beginMonth==1&&beginYears.contains(beginYear)){ refEnd=DateUtils.addMonths(begin,3); }else{ Integer addMonth=(beginYear-1)%3==0?3:(beginYear-1)%3; String endStr=DateUtils.parseDateToStr(DateUtils.YYYY_MM,DateUtils.addMonths(beginDate, addMonth))+"-01"; refEnd=DateUtils.dateTime(DateUtils.YYYY_MM_DD,endStr); } if(refEnd.after(end))refEnd=end; if(beginYear<4){ dateRef.setLineName(DateUtils.parseDateToStr(DateUtils.YY,begin)+"年第1季度"); }else if(beginYear<7){ dateRef.setLineName(DateUtils.parseDateToStr(DateUtils.YY,begin)+"年第2季度"); }else if(beginYear<10){ dateRef.setLineName(DateUtils.parseDateToStr(DateUtils.YY,begin)+"年第3季度"); }else{ dateRef.setLineName(DateUtils.parseDateToStr(DateUtils.YY,begin)+"年第4季度"); } }else if(splitWay.equals(SplitWay.HalfY)){ Integer beginMonth=CAL.get(Calendar.DATE); Integer beginYear=CAL.get(Calendar.MONTH)+1; List<Integer> beginYears=new ArrayList<>(); beginYears.add(1); beginYears.add(7); if(beginDate.equals(refEnd)&&beginMonth==1&&beginYears.contains(beginYear)){ refEnd=DateUtils.addMonths(begin,6); }else{ Integer addMonth=(beginYear-1)%6==0?6:(beginYear-1)%6; String endStr=DateUtils.parseDateToStr(DateUtils.YYYY_MM,DateUtils.addMonths(beginDate, addMonth))+"-01"; refEnd=DateUtils.dateTime(DateUtils.YYYY_MM_DD,endStr); } if(refEnd.after(end))refEnd=end; if(beginYear<7){ dateRef.setLineName(DateUtils.parseDateToStr(DateUtils.YY,begin)+"年上半年"); }else{ dateRef.setLineName(DateUtils.parseDateToStr(DateUtils.YY,begin)+"年下半年"); } }else{ refEnd= DateUtils.addDays(begin,-1); } if(refEnd.after(begin)) { dateRef.setEndTime(refEnd);; return dateRef; }else{ return null; } }else{ return null; } }
然后是内循环方法，生成list，也是私有的
private static List<ChartLine> getDates(List<ChartLine> dates,Date begin, Date end, SplitWay splitWay){ ChartLine one=getDateOne(begin,end,splitWay); if(one!=null) { dates.add(one); if(one.getEndTime().before(end)){ dates=getDates(dates,one.getEndTime(),end,splitWay); } } return dates; }
最后是public
public static List<ChartLine> toDateList(Date begin, Date end, SplitWay splitWay) { List<ChartLine> refDate=new ArrayList<>(); if(end.after(begin)){ refDate=getDates(refDate,begin,end,splitWay); } return refDate; }
题外话，正常前端默认是不会传具体起止时间给后端，传给后端也通常是【yyyy-MM-dd】格式，后端遇到这个问题可以有很多处理方式，我个人习惯是默认给一个时间的最大值最小值，而且结束时间正常加一天。那样SQL层面一个between-and梭哈就完了....
public static String getAddOneDayDate(String dateStr){ if(StringUtils.isNotEmpty(dateStr)) { try { Date date = DateUtils.addDays(DateUtils.dateTime(DateUtils.YYYY_MM_DD,dateStr),1); return DateUtils.parseDateToStr(DateUtils.YYYY_MM_DD_HH_MM_SS,date); }catch (Exception e){ return "2099-01-01 00:00:00"; } }else{ return "2099-01-01 00:00:00"; } } public static String getThisDayDate(String dateStr){ if(StringUtils.isNotEmpty(dateStr)) { try { Date date = DateUtils.dateTime(DateUtils.YYYY_MM_DD,dateStr); return DateUtils.parseDateToStr(DateUtils.YYYY_MM_DD_HH_MM_SS,date); }catch (Exception e){ return DateUtils.parseDateToStr(DateUtils.YYYY_MM_DD_HH_MM_SS,new Date(0L)); } }else{ return DateUtils.parseDateToStr(DateUtils.YYYY_MM_DD_HH_MM_SS,new Date(0L)); } }