【JAVA】SpringBoot + mongodb 分页、排序、动态多条件查询及事务处理

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Sort;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.query.Criteria;
import org.springframework.data.mongodb.core.query.Query;
import org.springframework.stereotype.Service;
 
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
 
@Service
public class YourService {
 
    @Autowired
    private MongoTemplate mongoTemplate;
 
    public Page<YourEntity> dynamicFindPaging(Map<String, Object> filter, int page, int size, String sortField, boolean isAsc) {
        Query query = new Query();
        if (filter != null) {
            filter.forEach(query::addCriteria);
        }
        Sort.Direction direction = isAsc ? Sort.Direction.ASC : Sort.Direction.DESC;
        if (sortField != null) {
            query.with(Sort.by(direction, sortField));
        }
        return mongoTemplate.find(query.with(PageRequest.of(page, size)), YourEntity.class);
    }
 
    public List<YourEntity> dynamicFind(Map<String, Object> filter, String sortField, boolean isAsc) {
        Query query = new Query();
        if (filter != null) {
            filter.forEach(query::addCriteria);
        }
        Sort.Direction direction = isAsc ? Sort.Direction.ASC : Sort.Direction.DESC;
        if (sortField != null) {
            query.with(Sort.by(direction, sortField));
        }
        return mongoTemplate.find(query, YourEntity.class);
    }
 
    public YourEntity save(YourEntity entity) {
        return mongoTemplate.save(entity, YourEntity.class);
    }
 
    public void deleteById(String id) {
        Query query = new Query(Criteria.where("id").is(id));
        mongoTemplate.remove(query, YourEntity.class);
    }
 
    // 事务处理方法
    public void performTransaction(List<YourEntity> entities) {
        mongoTemplate.execute(mongoOperations -> {
            for (YourEntity entity : entities) {
                mongoOperations.save(entity, YourEntity.class);
            }
            return null;
        });
    }
}
 
class YourEntity {
    // 实体类属性和方法
}

这个代码示例展示了如何在Spring Boot项目中使用MongoDB进行分页、排序、动态查询以及事务处理。dynamicFindPaging方法用于分页查询，dynamicFind方法用于排序查询，它们接受过滤条件、排序字段和排序方向。save方法用于保存实体，deleteById用于根据ID