java判断一个时间段是否与另外几个时间段重合

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可以使用Java中的DateTime API来判断时间段是否重合。具体实现可以参考以下步骤：   1. 创建需要判断是否重合的时间段对象和已有时间段的对象列表。   ```java // 创建需要判断是否重合的时间段对象 LocalDateTime start1 = LocalDateTime.of(2021, 1, 1, 9, 0); LocalDateTime end1 = LocalDateTime.of(2021, 1, 1, 10, 0); Duration duration1 = Duration.between(start1, end1);   // 创建已有的时间段对象列表 List<Duration> durations = new ArrayList<>(); LocalDateTime start2 = LocalDateTime.of(2021, 1, 1, 8, 30); LocalDateTime end2 = LocalDateTime.of(2021, 1, 1, 9, 30); Duration duration2 = Duration.between(start2, end2); durations.add(duration2);   LocalDateTime start3 = LocalDateTime.of(2021, 1, 1, 10, 0); LocalDateTime end3 = LocalDateTime.of(2021, 1, 1, 11, 0); Duration duration3 = Duration.between(start3, end3); durations.add(duration3); ```   2. 遍历已有时间段列表，使用overlaps()方法判断需要判断的时间段是否重合。   ```java for (Duration duration : durations) {     if (duration1.overlaps(duration)) {         System.out.println("时间段重合");         break;     } } ```   完整代码示例：   ```java import java.time.Duration; import java.time.LocalDateTime; import java.util.ArrayList; import java.util.List;   public class Main {     public static void main(String[] args) {         // 创建需要判断是否重合的时间段对象         LocalDateTime start1 = LocalDateTime.of(2021, 1, 1, 9, 0);         LocalDateTime end1 = LocalDateTime.of(2021, 1, 1, 10, 0);         Duration duration1 = Duration.between(start1, end1);           // 创建已有的时间段对象列表         List<Duration> durations = new ArrayList<>();         LocalDateTime start2 = LocalDateTime.of(2021, 1, 1, 8, 30);         LocalDateTime end2 = LocalDateTime.of(2021, 1, 1, 9, 30);         Duration duration2 = Duration.between(start2, end2);         durations.add(duration2);           LocalDateTime start3 = LocalDateTime.of(2021, 1, 1, 10, 0);         LocalDateTime end3 = LocalDateTime.of(2021, 1, 1, 11, 0);         Duration duration3 = Duration.between(start3, end3);         durations.add(duration3);           // 遍历已有时间段列表，判断时间段是否重合         for (Duration duration : durations) {             if (duration1.overlaps(duration)) {                 System.out.println("时间段重合");                 break;             }         }     } } ```