提防那种从不还手的人；他们既不肯宽恕你，也不容许你宽恕自己——萧伯纳
分享一个java解析ics的库
安装：
使用：https://www.ical4j.org/examples/parsing/
我这里是获取节假日信息，数据来源：节假日补班日历
可以直接用hutool-HttpUtil
HttpUtil.get("https://www.shuyz.com/githubfiles/china-holiday-calender/master/holidayCal.ics")
下面的stream操作用的是stream-core里的包
import cn.hutool.core.lang.Opt; import cn.hutool.core.util.ArrayUtil; import cn.hutool.core.util.EnumUtil; import cn.hutool.core.util.StrUtil; import io.github.vampireachao.stream.core.optional.Sf; import io.github.vampireachao.stream.core.stream.Steam; import net.fortuna.ical4j.data.CalendarBuilder; import net.fortuna.ical4j.model.Calendar; import net.fortuna.ical4j.model.Component; import net.fortuna.ical4j.model.Date; import net.fortuna.ical4j.model.component.VEvent; import java.io.StringReader; import java.time.LocalDateTime; import java.time.ZoneId; import java.util.ArrayList; import java.util.List; final Calendar calendar = Sf.ofStr(icsData).mayLet(StringReader::new).mayLet(new CalendarBuilder()::build).get(); final List<Holiday> holidays = Steam.of((List<Component>) calendar.getComponents()) .filter(VEvent.class::isInstance) .map(VEvent.class::cast) .<Holiday>map(event -> { final String[] splitSummary = Steam.split(event.getSummary().getValue(), " ").toArray(String[]::new); final int[] position = Opt.of(splitSummary).<String>map(a -> ArrayUtil.get(a, 2)) .map(i -> Steam.split(i, "/") .mapToInt(j -> Integer.parseInt(j.replace("天", "") .replace("共", "") .replace("第", "")) ).toArray()) .get(); final Date date = event.getStartDate().getDate(); final LocalDateTime localDateTime = LocalDateTime.ofInstant(date.toInstant(), ZoneId.systemDefault()); final String description = event.getDescription().getValue(); return Holiday.builder() .date(localDateTime.toLocalDate()) .type(EnumUtil.getBy(HolidayTypeEnum::getDesc, ArrayUtil.get(splitSummary, 1))) .festival(ArrayUtil.get(splitSummary, 0)) .description(description) .currentDay(ArrayUtil.get(position, 0)) .totalDay(ArrayUtil.get(position, 1)) .status(EnumUtil.getBy(HolidayStatusEnum::name, event.getStatus().getValue())) .notice(StrUtil.subAfter(description, ":", false)) .build(); }).toList();
实体类：
@Data @Builder public class Holiday { private LocalDate date; private HolidayTypeEnum type; private String festival; private String description; private Integer currentDay; private Integer totalDay; private String notice; private HolidayStatusEnum status; @Tolerate public Holiday() { // this is an accessible parameterless constructor. } }
俩枚举
@Getter @AllArgsConstructor public enum HolidayTypeEnum { /** * Cheating the compiler. */ HOLIDAY("假期"), WORK("补班"); private final String desc; }
状态
@Getter @AllArgsConstructor public enum HolidayStatusEnum { /** * Cheating the compiler. */ CONFIRMED("已确认"), TENTATIVE("暂定"); private final String desc; }
