Question

我正在创建一个功能，使用户能够搜索附近停车场，该停车场位于用户当前位置周围10公里处。

我正在使用Spring Hibernate和MySQL5InnoDBDialect。我尝试使用hibernate search 5.0.0.Final库按照本教程https://docs.jboss.org/hibernate/search/5.0/reference/en-US/html/spatial.html#spatial-queries-distance

实现此功能

但是在我触发查询后没有返回任何结果。我正在使用hibernate-core 4.3.7

休眠设置

注意：文件系统provider = filesystem，indexbase = lucene /

<!-- Hibernate SessionFactory -->
<beans:bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
    <beans:property name="dataSource" ref="dataSource" />
    <beans:property name="packagesToScan" value="com.jinheng.fyp.bean" />
<!--  Naming strategy  -->
    <beans:property name="namingStrategy" ref="myNaming" />
    <beans:property name="hibernateProperties">
        <beans:props>
            <beans:prop key="hibernate.dialect">${hibernate.dialect}</beans:prop>
            <beans:prop key="hibernate.show_sql">${hibernate.show_sql}</beans:prop>
            <beans:prop key="hibernate.format_sql">${hibernate.show_sql}</beans:prop>
            <beans:prop key="hibernate.generate_statistics">${hibernate.generate_statistics}</beans:prop>
            <beans:prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</beans:prop>
            <beans:prop key="cache.provider_class">org.hibernate.cache.NoCacheProvider</beans:prop>
            <beans:prop key="hibernate.default_batch_fetch_size">15</beans:prop>
            <beans:prop key="hibernate.use_sql_comments">true</beans:prop>
            <beans:prop key="hibernate.default-lazy">true</beans:prop>
            <beans:prop key="hibernate.order_updates">true</beans:prop>
            <beans:prop key="hibernate.connection.CharSet">utf8</beans:prop>
            <beans:prop key="hibernate.connection.characterEncoding">utf8</beans:prop>
            <beans:prop key="hibernate.connection.useUnicode">true</beans:prop>
            <beans:prop key="hibernate.query.substitutions">true 1, false 0, yes 'Y', no 'N'</beans:prop>
            <beans:prop key="hibernate.hbm2ddl.import_files_sql_extractor">org.hibernate.tool.hbm2ddl.MultipleLinesSqlCommandExtractor</beans:prop>
            <beans:prop key="hibernate.jdbc.use_streams_for_binary">false</beans:prop>
            <beans:prop key="hibernate.connection.isolation">4096</beans:prop>
            <beans:prop key="hibernate.search.default.directory_provider">${hibernate.search.default.directory_provider}</beans:prop>
            <beans:prop key="hibernate.search.default.indexBase">${hibernate.search.default.indexBase}</beans:prop>
            <beans:prop key="hibernate.search.lucene_version">4.1.0</beans:prop>
        </beans:props>
    </beans:property>
</beans:bean>

停车场课程

@Entity
@Spatial(spatialMode = SpatialMode.HASH)
@Indexed
public class Lot extends BasicTable {

private static final long serialVersionUID = 1L;

@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Integer lotID;

private String lotName;

private String lotType;

@Longitude
private Double longitude;

@Latitude
private Double latitude;

private String address;

private String operationHour;

private Integer capacity;

private String availability;

//getsetmethods

查询DAO类

@Repository
@Transactional
public class MapDAOImpl extends GenericDAO implements MapDAO {

@SuppressWarnings("unchecked")
@Override
public List<Lot> getNearbyLot(Double latitude, Double longitude, Integer radius) {
    FullTextSession fullTextSession = Search.getFullTextSession(getSessionFactory());
    QueryBuilder builder = fullTextSession.getSearchFactory().buildQueryBuilder().forEntity(Lot.class).get();

    org.apache.lucene.search.Query luceneQuery = builder.spatial().within(radius, Unit.KM).ofLatitude(latitude).andLongitude(longitude).createQuery();

    org.hibernate.Query hibernateQuery = fullTextSession.createFullTextQuery(luceneQuery, Lot.class);
     //this code works
    // org.hibernate.Query hibernateQuery = getSessionFactory().createSQLQuery("SELECT * FROM LOT").addEntity(Lot.class);
    List<Lot> result = hibernateQuery.list();
    return result;
}
}

Answer 1

它隐藏在文档中

http://docs.jboss.org/hibernate/search/5.4/api/org/hibernate/search/query/dsl/SpatialContext.html#onField%28java.lang.String%29

SpatialContext.onField（）：基本上如果你不提供onField（），它就不起作用，它不会找到你要搜索的字段的名称。这是一种方法：

org.apache.lucene.search.Query luceneQuery = spatialContext.onField("physical").within(100, Unit.KM).ofLatitude(centerLatitude).andLongitude(centerLongitude).createQuery();

＆＃34;物理＆＃34;这是物业的名称＆＃39; name＆＃39;添加到@Spatial @Latitude和@Longitude（如https://docs.jboss.org/hibernate/search/5.0/reference/en-US/html/spatial.html#spatial-multiplecoordinates中所示）

我的例子：

@javax.persistence.Entity @Indexed  @Spatial(name="physical")
public class Tutorial implements IBusiness {

@Latitude(of="physical") @Column
private Double latitude;
@Longitude(of="physical")  @Column
private Double longitude;
[... cut ...]

它对我有用，我希望它能帮助未来的读者。 Lucene也是一个很棒的API，Hibernate也是如此，但它们太宽泛了......可能是重构文档的时候了！

Hibernate-search 5.0空间返回没有结果

1 个答案: