Question

在这里，我试图找到我提供的范围内的所有实体。我的意思是，如果给定一定半径的圆，则必须显示所有位置坐标位于给定圆内的实体。

我正在使用休眠空间来实现这一目标。但是在JPA Repository接口中遇到了提到的错误。

这里是pom.xml，

<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-entitymanager</artifactId>
</dependency>
<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-spatial</artifactId>
    <version>5.2.12.Final</version>
</dependency>
<dependency>
    <groupId>org.opengeo</groupId>
    <artifactId>geodb</artifactId>
    <version>${project.version}</version>
</dependency>
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>6.0.6</version>
</dependency>

Jpa存储库

public interface ResourceRepository extends ExtendedJpaRepository<Resource, String> {   
    @Query(value = "select resource from Resource resource where within(resource.address.location, :circle) = true")
    List<Resource> test(@Param("circle") Geometry circle);
}

Resource.java，

@Entity
@NoArgsConstructor
public class Resource extends UUIDEntity2 implements IsResource {

    @Type(type = "org.hibernate.spatial.GeometryType")
    @OneToOne
    private Address address;

    /*getters setters*/
}

Address.java

@Entity
public class Address extends UUIDEntity2 implements HasEmailAddress, HasLocation {

    @Embedded
    @Column(columnDefinition = "point")
    private Location location;
    /*getters setters*/
}

location.java，

@Embeddable
@Value(staticConstructor = "of")
@RequiredArgsConstructor(staticName = "of")
public class Location implements Serializable {

    @Column(nullable = true)
    private Double lat;

    @Column(nullable = true)
    private Double lon;
}

测试

    @Inject
    private ResourceRepository resourceRepository;

    public Geometry createCircle(double x, double y, double radius) {
        GeometricShapeFactory shapeFactory = new GeometricShapeFactory();
        shapeFactory.setNumPoints(32);
        shapeFactory.setCentre(new Coordinate(x, y));
        shapeFactory.setSize(radius * 2);
        return shapeFactory.createCircle();
    }

    @Test
    public void geometry(){
        Geometry m = createCircle(0.0, 0.0, 5);
        List<Resource> resources = resourceRepository.test(m);
    }

application.properties，

hibernate.dialect=org.hibernate.spatial.dialect.mysql.MySQL56SpatialDialect

注意：实体的所有属性未在此处显示。我正在关注的参考文献：Hibernate-Spatial

Answer 1

听起来好像您没有为MySQL配置SpatialDialect。您可以验证是否有

行吗？

hibernate.dialect=org.hibernate.spatial.dialect.mysql.MySQL56SpatialDialect

hibernate.properties文件中的

。

您还可以检查日志以查看Hibernate实际使用的方言。它应该在名称中带有“ Spatial”，以便Spatial功能可用于休眠。

org.hibernate.engine.jdbc.spi.SqlExceptionHelper-未找到函数“ WITHIN”； SQL语句

1 个答案: