將地理位置保存到Postgis數據庫

Question

作為我項目的一部分，我試圖將帶有地理位置的Java對象保存到Postgis數據庫中，以便將Geolocation正確轉換為Postgis空間數據格式，並且我可以使用Postgis地理功能來進行簡單距離或半徑對象搜索。

問題是-我找不到可以轉換為Postgis DB的“ geometry”列的Java數據對象類型。

目前，嘗試將測試對象保存到數據庫時出現錯誤。 啟動應用程序時，數據庫表本身是正確創建的，並且它保存的對象沒有地理數據，因此我認為DB-Connection不是問題。 使用Postgis網站上的擴展指南將數據庫升級到Postgis。 我試圖解決的問題：

• 使用不同的類進行點創建-Java Point，vividsolutions幾何

• 插入其他jdbc依賴項-mysql-connector-java，PostgreSQL JDBC驅動程序。 也將休眠空間相關性用於注釋操作。

• 使用其他方言-PostgisDialect的不同版本

• 使用不同的注釋：

  @Column（columnDefinition =“ geometry（Point，4326）”）

導致同樣的錯誤，

@Column(columnDefinition = "Geometry", nullable = true)
@Type(type = "org.hibernate.spatial.GeometryType")

導致ClassNotFoundException-GeometryType。

這些的當前版本如下。 這似乎是最穩定的配置，沒有保存點就沒有錯誤。 使用的seve功能是標准的CRUD保存功能。

類聲明：

@Entity
@Table(name = "proposals")
public class Proposal implements Serializable {

@Id
@Exclude(CallType.REQUEST)
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "id")
private int id;

@Column(name = "name")
@Required
private String name;

@Column(columnDefinition = "Geometry")
private Point gis_location;//using org.postgis.Point

//getter, setter, constructor
}

Application.properties：

server.port=8100
spring.datasource.url = jdbc:postgresql://localhost:5432/postgres_proposals
spring.datasource.username = postgres
spring.datasource.password = pass

# JPA# JPA/Hibernate properties
spring.jpa.show-sql = true

spring.jpa.hibernate.ddl-auto = update

spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.PostgreSQLDialect
spring.jpa.hibernate.naming.strategy = org.hibernate.cfg.ImprovedNamingStrategy

Gradle依賴項：

dependencies {
compile('org.springframework.boot:spring-boot-starter-data-jpa')
compile('org.springframework.boot:spring-boot-starter-data-rest')
compile('org.springframework.boot:spring-boot-starter-jersey')
compile group: 'org.slf4j', name: 'slf4j-simple', version: '1.8.0-beta2'
compile group: 'org.slf4j', name: 'slf4j-api', version: '1.8.0-beta2'
compile group: 'net.postgis', name: 'postgis-jdbc', version: '2.3.0'
runtime ('net.postgis:postgis-jdbc:2.3.0')
testCompile('org.springframework.boot:spring-boot-starter-test')
testCompile group: 'org.mockito', name: 'mockito-core', version: '2.21.0'
testCompile 'junit:junit:4.12'
}

測試對象的創建：

Proposal p = new Proposal();
p.setId(0);
p.setName("prop1");
Point point = new Point(50,8.5,12);
p.setGis_location(point);
proposalRepository.save(p);

目前，嘗試將測試對象保存到數據庫時出現錯誤-僅當我嘗試保存wis gis_location Point時。 當評論p.setGis_location（point）; 應用程序將正常啟動，並且該對象出現在數據庫中-沒有地理數據。 在未注釋此行的情況下運行應用程序將導致以下錯誤：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'proposalApplication': Invocation of init method failed; nested exception is org.springframework.orm.jpa.JpaSystemException: could not execute statement; nested exception is org.hibernate.exception.GenericJDBCException: could not execute statement
Caused by: org.springframework.orm.jpa.JpaSystemException: could not execute statement; nested exception is org.hibernate.exception.GenericJDBCException: could not execute statement
at org.springframework.orm.jpa.vendor.HibernateJpaDialect.convertHibernateAccessException(HibernateJpaDialect.java:333)
at org.springframework.orm.jpa.vendor.HibernateJpaDialect.translateExceptionIfPossible(HibernateJpaDialect.java:244)
at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:521)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:761)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:730)
at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:518)
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:292)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodInterceptor.invoke(CrudMethodMetadataPostProcessor.java:133)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.data.repository.core.support.SurroundingTransactionDetectorMethodInterceptor.invoke(SurroundingTransactionDetectorMethodInterceptor.java:57)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213)
at com.sun.proxy.$Proxy91.save(Unknown Source)
at service.proposal.ProposalApplication.init(ProposalApplication.java:49)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:366)
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeInitMethods(InitDestroyAnnotationBeanPostProcessor.java:311)
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:134)
... 18 more
Caused by: org.hibernate.exception.GenericJDBCException: could not execute statement
at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:47)
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:109)
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:95)
at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:207)
at org.hibernate.engine.jdbc.batch.internal.NonBatchingBatch.addToBatch(NonBatchingBatch.java:45)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2949)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3449)
at org.hibernate.action.internal.EntityInsertAction.execute(EntityInsertAction.java:89)
at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:582)
at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:456)
at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:337)
at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:39)
at org.hibernate.internal.SessionImpl.flush(SessionImpl.java:1282)
at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:465)
at org.hibernate.internal.SessionImpl.flushBeforeTransactionCompletion(SessionImpl.java:2963)
at org.hibernate.internal.SessionImpl.beforeTransactionCompletion(SessionImpl.java:2339)
at org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl.beforeTransactionCompletion(JdbcCoordinatorImpl.java:485)
at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.beforeCompletionCallback(JdbcResourceLocalTransactionCoordinatorImpl.java:147)
at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.access$100(JdbcResourceLocalTransactionCoordinatorImpl.java:38)
at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl.commit(JdbcResourceLocalTransactionCoordinatorImpl.java:231)
at org.hibernate.engine.transaction.internal.TransactionImpl.commit(TransactionImpl.java:65)
at org.hibernate.jpa.internal.TransactionImpl.commit(TransactionImpl.java:61)
at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:517)
... 42 more
Caused by: org.postgresql.util.PSQLException: ERROR: Invalid endian flag value encountered.
at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2455)
at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:2155)
at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:288)
at org.postgresql.jdbc.PgStatement.executeInternal(PgStatement.java:430)
at org.postgresql.jdbc.PgStatement.execute(PgStatement.java:356)
at org.postgresql.jdbc.PgPreparedStatement.executeWithFlags(PgPreparedStatement.java:168)
at org.postgresql.jdbc.PgPreparedStatement.executeUpdate(PgPreparedStatement.java:135)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.tomcat.jdbc.pool.StatementFacade$StatementProxy.invoke(StatementFacade.java:114)
at com.sun.proxy.$Proxy96.executeUpdate(Unknown Source)
at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:204)
... 61 more

線

service.proposal.ProposalApplication.init（ProposalApplication.java:49）

錯誤中提到的確實是save（）函數。

我很感謝我如何解決此錯誤的任何建議。

Answer 1

您可以嘗試以WKT（眾所周知的文本）的形式將PostGIS原始坐標拋出。

例如，如果您可以從Java應用程序中獲得以坐標對作為屬性的點對象，例如[48.858401, 2.294474] ，則可以嘗試將其包裝成PostGIS可以理解的形式：

insert into mytable (geometrycolumn) values (ST_GeomFromText('POINT(48.858401 2.294474)')