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README
Apache-2.0

MilvusPlus:向量数据库增强操作库

MilvusPlus 是一个功能强大的 Java 库,旨在简化与 Milvus 向量数据库的交互,为开发者提供类似 MyBatis-Plus 注解和方法调用风格的直观 API。

目录

  1. 特性
  2. 快速开始
  3. 应用场景
  4. 自定义注解
  5. 索引与度量类型详解
  6. 使用案例
  7. 贡献
  8. 许可证
  9. 联系

特性

  • 注解式配置:采用与 MyBatis-Plus 类似的注解方式配置实体模型。
  • 直观的 API:直接的 API 设计简化数据库操作。
  • 易于扩展:核心设计注重可扩展性。
  • 类型安全:利用 Java 类型安全减少错误。

快速开始

自定义扩展支持:

<dependency>
    <groupId>io.github.javpower</groupId>
    <artifactId>milvus-plus-core</artifactId>
    <version>2.4.0-SNAPSHOT</version>
</dependency>

Spring应用支持:

<dependency>
    <groupId>io.github.javpower</groupId>
    <artifactId>milvus-plus-boot-starter</artifactId>
    <version>2.4.0-SNAPSHOT</version>
</dependency>

Solon应用支持:

<dependency>
    <groupId>io.github.javpower</groupId>
    <artifactId>milvus-plus-solon-plugin</artifactId>
    <version>2.4.0-SNAPSHOT</version>
</dependency>

应用场景

  • 相似性搜索:快速检索与给定向量最相似的项。
  • 推荐系统:根据用户行为和偏好推荐相关内容。
  • 图像检索:在大规模图像库中找到与查询图像最相似的图像。
  • 自然语言处理:将文本转换为向量并执行语义搜索。
  • 生物信息学:分析和比较生物序列,如蛋白质和基因组数据。

自定义注解

  • @MilvusCollection:标识 Java 类为 Milvus 集合。
  • @MilvusField:映射 Java 字段到 Milvus 字段。
  • @MilvusIndex:在 Milvus 字段上定义索引。

索引与度量类型详解

索引类型(IndexType)

  • INVALID:无效索引类型,仅用于内部标记。
  • FLAT:暴力搜索,适用于小规模数据集。
  • IVF_FLAT:倒排索引平面模式,适用于中等规模数据集。
  • IVF_SQ8:倒排索引量化模式,适用于大规模数据集,牺牲精度提升速度。
  • IVF_PQ:倒排索引产品量化模式,适用于大规模高维数据集,平衡速度和精度。
  • HNSW:分层导航小世界图,提供快速搜索,适用于大规模数据集。
  • DISKANN:基于磁盘的近似最近邻搜索,适用于存储在磁盘上的大规模数据集。
  • AUTOINDEX:自动选择最优索引类型。
  • SCANN:使用扫描和树结构加速搜索。
  • GPU_IVF_FLAT、GPU_IVF_PQ:GPU 加速索引,适用于 GPU 环境。
  • BIN_FLAT、BIN_IVF_FLAT:二进制向量专用索引。
  • TRIE:适用于字符串类型的字典树索引。
  • STL_SORT:适用于标量字段的排序索引。

度量类型(MetricType)

  • INVALID:无效度量类型,仅用于内部标记。
  • L2:欧几里得距离,适用于浮点向量。
  • IP:内积,用于计算余弦相似度。
  • COSINE:余弦相似度,适用于文本和图像搜索。
  • HAMMING:汉明距离,适用于二进制向量。
  • JACCARD:杰卡德相似系数,适用于集合相似度计算。

使用案例

以下是使用 MilvusPlus 进行向量搜索的示例:


@Data
@MilvusCollection(name = "face_collection") // 指定Milvus集合的名称
public class Face {
    @MilvusField(
            name = "person_id", // 字段名称
            dataType = DataType.Int64, // 数据类型为64位整数
            isPrimaryKey = true, // 标记为主键
    )
    private Long personId; // 人员的唯一标识符

    @MilvusField(
            name = "face_vector", // 字段名称
            dataType = DataType.FloatVector, // 数据类型为浮点型向量
            dimension = 128, // 向量维度,假设人脸特征向量的维度是128
    )
    @MilvusIndex(
            indexType = IndexParam.IndexType.IVF_FLAT, // 使用IVF_FLAT索引类型
            metricType = IndexParam.MetricType.L2, // 使用L2距离度量类型
            indexName = "face_index", // 索引名称
            extraParams = { // 指定额外的索引参数
                    @ExtraParam(key = "nlist", value = "100") // 例如,IVF的nlist参数
            }
    )
    private List<Float> faceVector; // 存储人脸特征的向量
}
@Component
public class FaceMilvusMapper extends MilvusMapper<Face> {
    
}

@Component
@Slf4j
public class ApplicationRunnerTest implements ApplicationRunner {
    private final FaceMilvusMapper mapper;

    public ApplicationRunnerTest(FaceMilvusMapper mapper) {
        this.mapper = mapper;
    }

    @Override
    public void run(ApplicationArguments args){
        Face face=new Face();
        List<Float> vector = new ArrayList<>();
        for (int i = 0; i < 128; i++) {
            vector.add((float) (Math.random() * 100)); // 这里仅作为示例使用随机数
        }
        face.setPersonId(1l);
        face.setFaceVector(vector);
        //新增
        List<Face> faces=new ArrayList<>();
        for (int i = 1; i < 10 ;i++){
            Face face1=new Face();
            face1.setPersonId(Long.valueOf(i));
            List<Float> vector1 = new ArrayList<>();
            for (int j = 0; j < 128; j++) {
                vector1.add((float) (Math.random() * 100)); // 这里仅作为示例使用随机数
            }
            face1.setFaceVector(vector1);
            faces.add(face1);
        }
        MilvusResp<InsertResp> insert = mapper.insert(faces.toArray(faces.toArray(new Face[0]))); log.info("insert--{}", JSONObject.toJSONString(insert));
        //id查询
        MilvusResp<List<MilvusResult<Face>>> query = mapper.getById(9l);
        log.info("query--getById---{}", JSONObject.toJSONString(query));
        //向量查询
        MilvusResp<List<MilvusResult<Face>>> query1 = mapper.queryWrapper()
                .vector(Face::getFaceVector, vector)
                .ne(Face::getPersonId, 1L)
                .topK(3)
                .query();
        log.info("向量查询 query--queryWrapper---{}", JSONObject.toJSONString(query1));
        //标量查询
        MilvusResp<List<MilvusResult<Face>>> query2 = mapper.queryWrapper()
                .eq(Face::getPersonId, 2L)
                .limit(3)
                .query();
        log.info("标量查询   query--queryWrapper---{}", JSONObject.toJSONString(query2));
        //更新
        vector.clear();
        for (int i = 0; i < 128; i++) {
            vector.add((float) (Math.random() * 100)); // 这里仅作为示例使用随机数
        }
        MilvusResp<UpsertResp> update = mapper.updateById(face);log.info("update--{}", JSONObject.toJSONString(update));
        //id查询
        MilvusResp<List<MilvusResult<Face>>> query3 = mapper.getById(1L);log.info("query--getById---{}", JSONObject.toJSONString(query3));
        //删除
        MilvusResp<DeleteResp> remove = mapper.removeById(1L);log.info("remove--{}", JSONObject.toJSONString(remove));
        //查询
        MilvusResp<List<MilvusResult<Face>>> query4 = mapper.getById(1L);log.info("query--{}", JSONObject.toJSONString(query4));

    }
}

贡献

欢迎贡献!

许可证

MilvusPlus 是开源的,遵循 许可证

联系

如有问题或需要支持,请联系 javpower@163.com

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🔥🔥🔥使用MyBatisPlus的方式,优雅的操作向量数据库 Milvus 展开 收起
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Apache-2.0
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