Spring 为什么我能'；是否将实体类的点域映射到数据库上的点域？栏「；地点“；是point类型，但表达式是bytea类型

我正在处理我的第一个Spring Boot+Spring数据JPA+Hibernate 5处理PostgreSQL数据库

我在尝试映射一个数据类型为点的字段时遇到了以下问题（因此我使用的是本机包含在Hibernate 5中的Hibernate Spatial）

因此，我有以下情况：

我有以下名为cities的简单数据库表：

Field              Type   
----------------------------------------------------------------    
id                 bigint                   (it is the PK)
name               character varying
location           point                    (it contains the coordinates)

例如，此表包含以下记录：

id         name             locoation
--------------------------------------
1          San Francisco    (-194,53)

然后我有了这个Cities实体类，它映射了前面的Cities数据库表：

import com.vividsolutions.jts.geom.Point;
import org.hibernate.annotations.Type;
import javax.persistence.*;
import java.io.Serializable;

@Entity
@Table(name = "cities")
public class Cities implements Serializable {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "id")
    private Long id;

    private String name;

    @Column(name = "location", columnDefinition="Point")
    private Point location;

    public Cities() {
    }

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Point getLocation() {
        return location;
    }

    public void setLocation(Point location) {
        this.location = location;
    }
}

我正在使用Point类的这个实现：com.livitSolutions.jts.geom.Point，因为我在一些教程中找到了它，但我不确定它是否正确，因为我还可以选择这些其他实现：

org.geolatte.geom.Point
org.springframework.data.geo.Point

然后我有这个Spring数据JPA接口，它代表我的DAO类：

@Repository
public interface CitiesDAO extends JpaRepository<Cities, Long> {

    Cities findById(@Param("id") Long id);
}

因此，我正在创建一个要持久化的对象（罗马城市），在该对象上我设置了一个全新的点对象，并尝试通过以下行来持久化它：

citiesDAO.save(rome);

问题是，当尝试执行保存（罗马）方法时，会抛出此异常：

Hibernate: select cities0_.id as id1_0_0_, cities0_.location as location2_0_0_, cities0_.name as name3_0_0_ from cities cities0_ where cities0_.id=?
Hibernate: insert into cities (location, name) values (?, ?)
2016-10-29 20:08:09.509 ERROR 7956 --- [           main] o.h.engine.jdbc.spi.SqlExceptionHelper   : ERROR: column "location" is of type point but expression is of type bytea
  Hint: You will need to rewrite or cast the expression.
  Position: 45

org.springframework.dao.InvalidDataAccessResourceUsageException: could not execute statement; SQL [n/a]; nested exception is org.hibernate.exception.SQLGrammarException: could not execute statement

    at org.springframework.orm.jpa.vendor.HibernateJpaDialect.convertHibernateAccessException(HibernateJpaDialect.java:261)
    at org.springframework.orm.jpa.vendor.HibernateJpaDialect.translateExceptionIfPossible(HibernateJpaDialect.java:244)
    at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.translateExceptionIfPossible(AbstractEntityManagerFactoryBean.java:491)
    at org.springframework.dao.support.ChainedPersistenceExceptionTranslator.translateExceptionIfPossible(ChainedPersistenceExceptionTranslator.java:59)
    at org.springframework.dao.support.DataAccessUtils.translateIfNecessary(DataAccessUtils.java:213)
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:147)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodInterceptor.invoke(CrudMethodMetadataPostProcessor.java:133)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213)
    at com.sun.proxy.$Proxy105.save(Unknown Source)
    at com.betriuvis.controller.test.PlaceSearcherControllerTest.testCitiesDAO(PlaceSearcherControllerTest.java:111)
    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:497)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
    at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
    at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:252)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:94)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:191)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:117)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:42)
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:262)
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:84)
    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:497)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
Caused by: org.hibernate.exception.SQLGrammarException: could not execute statement
    at org.hibernate.exception.internal.SQLStateConversionDelegate.convert(SQLStateConversionDelegate.java:106)
    at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:42)
    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.dialect.identity.GetGeneratedKeysDelegate.executeAndExtract(GetGeneratedKeysDelegate.java:57)
    at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:42)
    at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2803)
    at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3374)
    at org.hibernate.action.internal.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:81)
    at org.hibernate.engine.spi.ActionQueue.execute(ActionQueue.java:619)
    at org.hibernate.engine.spi.ActionQueue.addResolvedEntityInsertAction(ActionQueue.java:273)
    at org.hibernate.engine.spi.ActionQueue.addInsertAction(ActionQueue.java:254)
    at org.hibernate.engine.spi.ActionQueue.addAction(ActionQueue.java:299)
    at org.hibernate.event.internal.AbstractSaveEventListener.addInsertAction(AbstractSaveEventListener.java:317)
    at org.hibernate.event.internal.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:272)
    at org.hibernate.event.internal.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:178)
    at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:109)
    at org.hibernate.jpa.event.internal.core.JpaMergeEventListener.saveWithGeneratedId(JpaMergeEventListener.java:56)
    at org.hibernate.event.internal.DefaultMergeEventListener.saveTransientEntity(DefaultMergeEventListener.java:255)
    at org.hibernate.event.internal.DefaultMergeEventListener.entityIsTransient(DefaultMergeEventListener.java:235)
    at org.hibernate.event.internal.DefaultMergeEventListener.entityIsDetached(DefaultMergeEventListener.java:301)
    at org.hibernate.event.internal.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:170)
    at org.hibernate.event.internal.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:69)
    at org.hibernate.internal.SessionImpl.fireMerge(SessionImpl.java:840)
    at org.hibernate.internal.SessionImpl.merge(SessionImpl.java:822)
    at org.hibernate.internal.SessionImpl.merge(SessionImpl.java:827)
    at org.hibernate.jpa.spi.AbstractEntityManagerImpl.merge(AbstractEntityManagerImpl.java:1161)
    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:497)
    at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:298)
    at com.sun.proxy.$Proxy101.merge(Unknown Source)
    at org.springframework.data.jpa.repository.support.SimpleJpaRepository.save(SimpleJpaRepository.java:509)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.executeMethodOn(RepositoryFactorySupport.java:503)
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:488)
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:460)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:61)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:281)
    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)
    ... 41 more
Caused by: org.postgresql.util.PSQLException: ERROR: column "location" is of type point but expression is of type bytea
  Hint: You will need to rewrite or cast the expression.
  Position: 45
    at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2062)
    at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1795)
    at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:257)
    at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:479)
    at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:367)
    at org.postgresql.jdbc2.AbstractJdbc2Statement.executeUpdate(AbstractJdbc2Statement.java:321)
    at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:204)
    ... 86 more

因此，基本上错误信息是：

Caused by: org.postgresql.util.PSQLException: ERROR: column "location" is of type point but expression is of type bytea

因此，似乎试图在表的位置字段中输入错误的数据类型为点。为什么它不能将使用的com.livitSolutions.jts.geom.point对象转换为实体类

这是我的应用程序。属性文件，是我的应用程序中唯一的配置文件：

#No auth  protected
endpoints.shutdown.sensitive=true
#Enable shutdown endpoint
endpoints.shutdown.enabled=true
logging.file=BeTriviusController.log
logging.level.org.springframework.web=DEBUG
logging.level.org.hibernate=ERROR

# Thymeleaf
spring.thymeleaf.cache:false


# DATABASE CONFIG ----------------------------------------------------------------------------------------------------
spring.datasource.url = jdbc:postgresql://localhost:5432/test1
spring.datasource.username = postgres
spring.datasource.password = Bl4tte_Te4m
spring.datasource.driver-class-name = org.postgresql.Driver

spring.jpa.properties.hibernate.current_session_context_class=org.springframework.orm.hibernate5.SpringSessionContext

spring.datasource.testWhileIdle = true
spring.datasource.validationQuery = SELECT 1

# Show or not log for each sql query
spring.jpa.show-sql = true

# Hibernate ddl auto (create, create-drop, update, validate)
spring.jpa.hibernate.ddl-auto = validate

#spring.jpa.hibernate.naming-strategy = org.hibernate.cfg.ImprovedNamingStrategy

spring.jpa.properties.hibernate.dialect=org.hibernate.spatial.dialect.postgis.PostgisDialect

如您所见，我已将spring.jpa.hibernate.naming策略设置为postgisdial方言，以使用hibernate空间

---

什么是工作？我缺少什么？我如何解决这个问题？

您已经为Postgresql+Postgis正确设置了所有内容，但是您的数据库使用Postgresql几何类型，而不是Postgis提供的几何类型。Hibernate Spatial仅支持Postgis空间扩展

---

确保安装了Postgis，并且您的表使用Postgis提供的类型“Geometry”作为位置列。

我建议使用更通用的方法，如中所示。对于我来说，为点这样简单的类型安装数据库扩展/使用几何类型操作是一种过分的做法。

我使用Mysql 5和Point反对，也有同样的问题。 这是最新的方言版本，所以我把它降级了。 从以下内容更改应用程序属性：

spring.jpa.properties.hibernate.dialect=org.hibernate.spatial.dialect.mysql.MySQL56InnoDBSpatialDialect
spring.jpa.database-platform = org.hibernate.spatial.dialect.mysql.MySQLSpatial56Dialect

为此：

spring.jpa.properties.hibernate.dialect=org.hibernate.spatial.dialect.mysql.MySQL5InnoDBSpatialDialect
spring.jpa.database-platform = org.hibernate.spatial.dialect.mysql.MySQLSpatial56Dialect

---

我希望它能帮助您。

我使用的是Hibernate-{core，spatial}v5.2.9，除了在

应用程序中如何设置方言之外，一切都与上面一样。属性

.I需要：

spring.jpa.database platform=org.hibernate.spatical.dialent.postgis.postgisdialent

---

现在它可以工作了。我的实体中甚至不需要任何@Column注释。

从2020年5月18日星期一开始

依赖项如下所示：

<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-spatial</artifactId>
    <version>5.4.15.Final</version>
</dependency>

---

好的，tnx，还有一些问题：1）存在两种不同版本的“点”数据类型吗？一个属于本机PostgreSQL数据库，另一个属于PostGIS扩展？为什么存在相同数据类型的两个不同版本？这两个版本有什么不同？2） 您如何理解我使用的是原生PostgreSQL数据类型而不是PostGIS数据类型？Tnx so muchPostgis是简单功能规范的一个实现，具有更多用于处理地理信息的功能/操作符。它是由一个单独的团队开发的。您可以在表定义（postgis使用几何图形/地理类型）和表内容（在postgis中，您会看到一个十六进制编码的bytestring，或者可能是WKT点表示，而不是（x，y））中区分原生和postgis。我也有此错误。。。有人解决了吗？。。。。原因：org.postgresql.util.PSQLException:错误：列“city_location”的类型为point，但表达式的类型为bytea Suggerimento:您需要重写或强制转换表达式。

<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-spatial</artifactId>
    <version>5.4.15.Final</version>
</dependency>

spring:
  jpa:
    show-sql: true
    generate-ddl: false
    hibernate:
      ddl-auto: none
    properties:
      hibernate:
        format_sql: true
        dialect: org.hibernate.spatial.dialect.mysql.MySQL8SpatialDialect