假设我有下表
CREATE TABLE foo (
id BIGSERIAL PRIMARY KEY,
polygon GEOMETRY(POLYGON)
);
和实体类
@Table
@Entity
public class Foo {
@Id
@GeneratedValue(strategy = IDENTITY)
private Long id;
private Polygon polygon;
}
我设法保存了一个Foo实体,但是,我无法从数据库中选择它们。我得到了这个例外:
java.lang.NumberFormatException: For input string: "PO"
然后,我在多边形字段顶部添加了以下注释:
@Type(type = "org.hibernate.spatial.JTSGeometryType")
但它会抛出 另一个例外,说这种类型无法实例化:
org.hibernate.MappingException: Could not instantiate Type: org.hibernate.spatial.JTSGeometryType
请注意我使用5.1.0.Final版本用于hibernate和hibernate-spatial。
谢谢
答案 0 :(得分:7)
似乎hibernate-spartial 5.x
知道如何本地处理JTS几何类型,因此不需要类型注释。这是我的工作配置。
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-spatial</artifactId>
<version>5.2.3.Final</version>
</dependency>
MySQL表...
CREATE TABLE `stuff` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`coordinates` point NOT NULL,
PRIMARY KEY (`id`),
SPATIAL KEY `coordinates` (`coordinates`)
)
JPA实体......
import com.vividsolutions.jts.geom.Point;
...
@Basic(optional = false)
@NotNull
@Column(nullable = false, columnDefinition = "point")
private Point coordinates;
Hibernate方言......
<property name="hibernate.dialect" value="org.hibernate.spatial.dialect.mysql.MySQLSpatialDialect"/>
请注意,我的应用程序在WildFly 10中运行,它提供了额外的运行时依赖性,如MySQL驱动程序。
答案 1 :(得分:0)
你应该尝试给出列名
@Entity<br/>
@Table(name = "table_name")<br/>
public class Foo {<br/>
@Id
@GeneratedValue(strategy = IDENTITY)
private Long id;
@Type(type = "org.hibernate.spatial.GeometryType")
@Column(name = "the_geom", nullable = true,columnDefinition="Geometry")
private Geometry geom;
@Type(type = "org.hibernate.spatial.GeometryType",columnDefinition="Geometry")
private Polygon polygon;
}
你还应该知道,从Hibernate Spatial 4.0-M1开始,只有几何类型被指定给Hibernate,因此@Column注释必须设置columnDefinition="Geometry"
,而不是Point或其他任何东西。这可能会在将来修复。
通过这个修改选集,我终于可以写一个数据库了!正确的属性规范是:
@Column(columnDefinition="Geometry")
@Type(type = "org.hibernate.spatial.GeometryType")
private Point centerPoint;
还要在 hibernate.cfg.xml
中查看方言将以下行添加到 hibernate.cfg.xml
<property name="dialect">org.hibernate.spatial.dialect.postgis.PostgisDialect</property>
答案 2 :(得分:0)
I downgraded to hibernate-spatial 4.3 version. Please see my configuration below.
Entity column:
@Column(columnDefinition = "Geometry")
@Type(type = "org.hibernate.spatial.GeometryType")
private Polygon polygon;
The Polygon class can be found in com.vividsolutions.jts.geom
package.
Dependencies:
<dependencies>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-spatial</artifactId>
<version>4.3</version>
</dependency>
<dependency>
<groupId>org.postgis</groupId>
<artifactId>postgis-jdbc</artifactId>
<version>1.3.3</version>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<version>9.4.1208.jre7</version>
</dependency>
</dependencies>
Repositories:
<repositories>
<repository>
<id>OSGEO GeoTools repo</id>
<url>http://download.osgeo.org/webdav/geotools</url>
</repository>
<repository>
<id>Hibernate Spatial repo</id>
<url>http://www.hibernatespatial.org/repository</url>
</repository>
</repositories>
Hibernate dialect:
org.hibernate.spatial.dialect.postgis.PostgisDialect