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嘗試使用HibernateSpatial API在數據庫中存儲多邊形形狀。我已按照this tutorial存儲值。我正在使用Mysql作爲我的數據庫服務器。所以爲我的場景做了一些改變。獲取以下錯誤以將其存儲在數據庫中。如何在HibernateSpatial API中從多邊形對象數據類型更改幾何對象數據類型？
：：ERROR：：
錯誤[org.hibernate.engine.jdbc.spi.SqlExceptionHelper（基於HTTP/192.168.5.244：8080-1）數據截斷：無法獲取幾何從數據對象發送到幾何領域
錯誤[com.service.HibernateSaveService（基於HTTP/192.168.5.244：8080-1）例外：_：無法執行語句
提示
我得到這個錯誤，因爲試圖直接在Geometry數據類型中傳遞多邊形（這是我的假設）。請幫我解決這個問題，並幫助我將值存儲在數據庫中。
我的代碼如下。
實體類：_：
package com.entity;
// Generated Mar 1, 2014 12:22:56 PM by Hibernate Tools 3.4.0.CR1
import static javax.persistence.GenerationType.IDENTITY;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;
import javax.persistence.UniqueConstraint;
import org.hibernate.annotations.Type;
import com.vividsolutions.jts.geom.Polygon;
/**
* HibernateSpatial generated by hbm2java
*/
@Entity
@Table(name = "HIBERNATE_SPATIAL", catalog = "geocodedb", uniqueConstraints = @UniqueConstraint(columnNames = "GEO_REGION_NAME"))
public class HibernateSpatialEntity implements java.io.Serializable {
/**
*
*/
private static final long serialVersionUID = 1L;
private Integer prdGeoRegionId;
private String geoRegionName;
private String geoRegionDescription;
@Type(type="org.hibernate.spatial.GeometryType")
private Polygon geoRegionDefinition;
@Id
@GeneratedValue(strategy = IDENTITY)
@Column(name = "PRD_GEO_REGION_ID", unique = true, nullable = false)
public Integer getPrdGeoRegionId() {
return this.prdGeoRegionId;
}
public void setPrdGeoRegionId(Integer prdGeoRegionId) {
this.prdGeoRegionId = prdGeoRegionId;
}
@Column(name = "GEO_REGION_NAME", unique = true, nullable = false, length = 50)
public String getGeoRegionName() {
return this.geoRegionName;
}
public void setGeoRegionName(String geoRegionName) {
this.geoRegionName = geoRegionName;
}
@Column(name = "GEO_REGION_DESCRIPTION", length = 70)
public String getGeoRegionDescription() {
return this.geoRegionDescription;
}
public void setGeoRegionDescription(String geoRegionDescription) {
this.geoRegionDescription = geoRegionDescription;
}
@Column(name = "GEO_REGION_DEFINITION")
public Polygon getGeoRegionDefinition() {
return this.geoRegionDefinition;
}
public void setGeoRegionDefinition(Polygon geoRegionDefinition) {
this.geoRegionDefinition = geoRegionDefinition;
}
}
PERSIST CLASS：_：
package com.service;
import java.util.Random;
import javax.ejb.Stateless;
import javax.ejb.TransactionManagement;
import javax.ejb.TransactionManagementType;
import javax.persistence.EntityManager;
import javax.persistence.Persistence;
import javax.ws.rs.Consumes;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import org.hibernate.Session;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.solartis.entity.HibernateSpatialEntity;
import com.vividsolutions.jts.geom.Geometry;
import com.vividsolutions.jts.geom.Polygon;
import com.vividsolutions.jts.io.ParseException;
import com.vividsolutions.jts.io.WKTReader;
@Stateless
@TransactionManagement(TransactionManagementType.BEAN)
@Path("/")
public class HibernateSaveService {
/**
* mLogger - attribute used for to write the log
*/
private static final Logger mLogger = LoggerFactory
.getLogger(HibernateSaveService.class);
@POST
@Path("/saveHibernate")
@Consumes("*/*")
@Produces("*/*")
public String saveShapes(String jsonRequest) {
String statusResult = null;
String methodName = "saveShapes";
StringBuilder regionName = null;
Session session = null;
Random random = null;
HibernateSpatialEntity hibernateEntity = null;
Polygon poly = null;
String singleShape = "Polygon((-50.123456789 -50.123456789,50.98765432175 -50.753951654852,50 50,-50 50,-50.123456789 -50.123456789))";
mLogger.debug("Entered inside the Method :_: " + methodName);
Geometry geom = wktToGeometry(singleShape);
try {
EntityManager entity = Persistence.createEntityManagerFactory(
"spatialPersistenceUnit").createEntityManager();
session = (Session) entity.getDelegate();
if (!geom.getGeometryType().equals("Polygon")) {
throw new RuntimeException("Geometry must be a Polygon. Got a " + geom.getGeometryType());
}
else {
//poly.
mLogger.info("GeoType :_: " + geom.getGeometryType());
hibernateEntity = new HibernateSpatialEntity();
random = new Random();
hibernateEntity.setGeoRegionDefinition((Polygon)geom);
hibernateEntity.setGeoRegionDescription("ABCDEFGHIJKLMNOPQRSTUVWXYZ");
regionName = new StringBuilder();
regionName.append("RegionName :_: ").append(random.nextInt(10000));
hibernateEntity.setGeoRegionName(regionName.toString());
mLogger.info("StoredName :_: " + regionName.toString());
session.beginTransaction();
session.save(hibernateEntity);
}
} catch(Exception exception) {
mLogger.error("Exception :_: " + exception.getMessage());
} finally {
session.clear();
if ((session != null) && (session.isOpen())) {
session.close();
}
}
mLogger.debug("Exited from the Method :_: " + methodName);
return statusResult;
}
private Geometry wktToGeometry(String wktPoint) {
WKTReader fromText = new WKTReader();
Geometry geom = null;
try {
geom = fromText.read(wktPoint);
} catch (ParseException e) {
throw new RuntimeException("Not a WKT string:" + wktPoint);
}
return geom;
}
}
DATABASE SCHEMA
+------------------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+------------------------+--------------+------+-----+---------+----------------+
| PRD_GEO_REGION_ID | int(11) | NO | PRI | NULL | auto_increment |
| OWNER_ID | decimal(3,0) | NO | | NULL | |
| GEO_REGION_NAME | varchar(50) | NO | UNI | NULL | |
| GEO_REGION_DESCRIPTION | varchar(70) | YES | | NULL | |
| GEO_REGION_DEFINITION | geometry | YES | | NULL | |
+------------------------+--------------+------+-----+---------+----------------+
倫瑞格ds， ArunRaj。