如何使用Spring-data-mongodb按月对日期进行分组，并获取每个月的最新值？

@Document(collection = "your_collection_name")
public class YourModel {
    @Id
    private String id;
    private Date date;
    // 其他字段
    // getter和setter方法
}

@Repository
public interface YourRepository extends MongoRepository<YourModel, String> {
    @Aggregation(pipeline = {
            "{$group: {_id: { $dateToString: { format: '%Y-%m', date: '$date' } }, maxDate: { $max: '$date' } }}",
            "{$sort: { _id: 1 }}"
    })
    List<YourProjection> groupByMonthAndFindLatest();
}

public interface YourProjection {
    String get_id();
    Date getMaxDate();
}

@Autowired
private YourRepository yourRepository;

public void yourMethod() {
    List<YourProjection> result = yourRepository.groupByMonthAndFindLatest();
    // 处理结果
}