我要评论判断多个时间段是否有间隔
实体类内容
public class daterangestr {
@jsonformat(shape = jsonformat.shape.string, pattern="yyyy-mm", timezone = "gmt+8")
private string startdate;//格式：yyyy-mm-dd
@jsonformat(shape = jsonformat.shape.string, pattern="yyyy-mm", timezone = "gmt+8")
private string enddate;//格式：yyyy-mm-dd
}
主方法内容
//判断多个时间段是否有时间间隔 true无间隔 false有间隔
public boolean hasnogaps(list<daterangestr> sortedstrranges) {
datetimeformatter formatter = datetimeformatter.ofpattern("yyyy-mm-dd");
if (sortedstrranges == null || sortedstrranges.size() <= 0) return false;
if (sortedstrranges.size() == 1) return true;
list<daterange> timeperiods = new arraylist<>();
for (daterangestr ss : sortedstrranges) {
localdate startdate = localdate.parse(ss.getstartdate(), formatter);
localdate enddate = localdate.parse(ss.getenddate(), formatter);
daterange dr = new daterange();
dr.setstartdate(startdate);
dr.setenddate(enddate);
timeperiods.add(dr);
}
collections.sort(timeperiods, comparator.comparing(daterange::getstartdate));
localdate previousenddate = timeperiods.get(0).getenddate();
for (int i = 1; i < timeperiods.size(); i++) {
daterange currentperiod = timeperiods.get(i);
if (previousenddate.isafter(currentperiod.getstartdate())) {
// 当前时间段的开始日期早于上一个时间段的结束日期，存在重叠，这不一定是问题
// 但我们仍然将当前时间段的结束日期作为新的previousenddate
previousenddate = currentperiod.getenddate();
} else if ((!previousenddate.isequal(currentperiod.getstartdate()) && !previousenddate.plusdays(1l).isequal(currentperiod.getstartdate()))) {
// 发现了间隔
return false;
} else {
// 相邻时间段之间没有间隔
previousenddate = currentperiod.getenddate();
}
}
return true; // 所有时间段都已遍历完毕，且没有发现时间间隔
}
判断时间段集合是否与某时间段重合
实体类内容
public class timeinterval {
@jsonformat(shape = jsonformat.shape.string, pattern="yyyy-mm", timezone = "gmt+8")
private string start;
@jsonformat(shape = jsonformat.shape.string, pattern="yyyy-mm", timezone = "gmt+8")
private string end;
}
主方法内容
private static yearmonth parseyearmonth(string input) {
try {
return yearmonth.parse(input, month_formatter);
} catch (exception e) {
throw new illegalargumentexception("invalid date format: " + input, e);
}
}
public static boolean overlapsorcontainedinintervals(list<timeinterval> intervals, string startdate,string enddate) {
yearmonth yearmonthastart = parseyearmonth(startdate);
yearmonth yearmonthaend = parseyearmonth(enddate);
for (timeinterval interval : intervals) {
yearmonth start = parseyearmonth(interval.getstart());
yearmonth end = parseyearmonth(interval.getend());
// 检查重叠或包含
if (!start.isafter(yearmonthaend) && !end.isbefore(yearmonthastart)) {
return true;
}
}
return false;
}
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