mongoTemplate查询

1、精确查询用“is”

            Criteria criteria=new Criteria("namespaceName");
            criteria.is(namespaceName);
            Query query = new Query(criteria);
            return mongoTemplate.find(query,StorageBO.class,StorageConstant.STORAGE_COLLECTION_NAME);

2、模糊查询用“regex”

            Criteria criteria=new Criteria("storageName");
            criteria.regex(storageName);
            Query query = new Query(criteria);
            return mongoTemplate.find(query,StorageBO.class,StorageConstant.STORAGE_COLLECTION_NAME);

3、模糊查询示例2

//完全匹配
Pattern pattern = Pattern.compile("^hzb$", Pattern.CASE_INSENSITIVE);
//右匹配
Pattern pattern = Pattern.compile("^.*hzb$", Pattern.CASE_INSENSITIVE);
//左匹配
Pattern pattern = Pattern.compile("^hzb.*$", Pattern.CASE_INSENSITIVE);
//模糊匹配
Pattern pattern = Pattern.compile("^.*hzb.*$", Pattern.CASE_INSENSITIVE);
Query query = Query.query(Criteria.where(fieldName).regex(pattern));  
        List<StorageBO> storages = mongoTemplate.find(query, StorageBO.class, collectionName);
        return storages;

 4、按createTime降序排序

以下红色部分是排序设置

            Criteria criteria=new Criteria("namespaceName");
            criteria.is(namespaceName);
            criteria.and("tenantName").is(tenantName);
            Query query = new Query(criteria);
            query.with(new Sort(Sort.Direction.DESC,   "createTime"));
            return mongoTemplate.find(query,StorageBO.class,StorageConstant.STORAGE_COLLECTION_NAME);