Question

public void GetLevel(int id) 
    {
        Type doubleArrayType=new TypeLocatorImpl(new TypeResolver())
                .custom(DoubleArrayUserType.class);
        Query query =  sf.getCurrentSession().
                createSQLQuery("select waterLevel from FtpData").
                addScalar("waterLevel", doubleArrayType);


        @SuppressWarnings("unchecked")
        List<Double[]> results=(List<Double[]>) query.list();
        System.out.println("In dao layer data:"+results);
        return;
    }

尝试访问具有double数组的db，我已经编写了用户类型类:::

package com.app.usertype;

import org.apache.commons.lang3.ArrayUtils;
import org.hibernate.HibernateException;
import org.hibernate.engine.spi.SessionImplementor;
import org.hibernate.usertype.UserType;

import java.io.Serializable;
import java.sql.*;

public class DoubleArrayUserType implements UserType {
    protected static final int  SQLTYPE = java.sql.Types.ARRAY;

    @Override
    public Object nullSafeGet(final ResultSet rs, final String[] names, final SessionImplementor sessionImplementor, final Object owner) throws HibernateException, SQLException {
        Array array = rs.getArray(names[0]);
        Double[] javaArray = (Double[]) array.getArray();
        return ArrayUtils.toPrimitive(javaArray);
    }

    @Override
    public void nullSafeSet(final PreparedStatement statement, final Object object, final int i, final SessionImplementor sessionImplementor) throws HibernateException, SQLException {
        Connection connection = statement.getConnection();

        double[] castObject = (double[]) object;
        Double[] doubles = ArrayUtils.toObject(castObject);
        Array array = connection.createArrayOf("DOUBLE", doubles);

        statement.setArray(i, array);
    }

    @Override
    public Object assemble(final Serializable cached, final Object owner) throws HibernateException {
        return cached;
    }

    @Override
    public Object deepCopy(final Object o) throws HibernateException {
        return o == null ? null : ((double[]) o).clone();
    }

    @Override
    public Serializable disassemble(final Object o) throws HibernateException {
        return (Serializable) o;
    }

    @Override
    public boolean equals(final Object x, final Object y) throws HibernateException {
        return x == null ? y == null : x.equals(y);
    }

    @Override
    public int hashCode(final Object o) throws HibernateException {
        return o == null ? 0 : o.hashCode();
    }

    @Override
    public boolean isMutable() {
        return false;
    }

    @Override
    public Object replace(final Object original, final Object target, final Object owner) throws HibernateException {
        return original;
    }

    @Override
    public Class<double[]> returnedClass() {
        return double[].class;
    }

    @Override
    public int[] sqlTypes() {
        return new int[] { SQLTYPE };
    }
}

但它正在给出错误:::

org.hibernate.MappingException：没有JDBC类型的Dialect映射：2003 在org.hibernate.dialect.TypeNames.get（TypeNames.java:76）at org.hibernate.dialect.TypeNames.get（TypeNames.java:99）at org.hibernate.dialect.Dialect.getTypeName（Dialect.java:297）at org.hibernate.mapping.Column.getSqlType（Column.java:227）at org.hibernate.mapping.Table.validateColumns（Table.java：373）at org.hibernate.cfg.Configuration.validateSchema（Configuration.java:1275）在 org.hibernate.tool.hbm2ddl.SchemaValidator.validate（SchemaValidator.java:155）在 org.hibernate.internal.SessionFactoryImpl。（SessionFactoryImpl.java:506）在 org.hibernate.cfg.Configuration.buildSessionFactory（Configuration.java:1750）在 org.hibernate.cfg.Configuration.buildSessionFactory（Configuration.java:1788）在 org.springframework.orm.hibernate4.LocalSessionFactoryBuilder.buildSessionFactory（LocalSessionFactoryBuilder.java:343）在 org.springframework.orm.hibernate4.LocalSessionFactoryBean.buildSessionFactory（LocalSessionFactoryBean.java:431）在 org.springframework.orm.hibernate4.LocalSessionFactoryBean.afterPropertiesSet（LocalSessionFactoryBean.java:416）在 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods（AbstractAutowireCapableBeanFactory.java:1612）在 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean（AbstractAutowireCapableBeanFactory.java:1549）在 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:539）在 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:475）在 org.springframework.beans.factory.support.AbstractBeanFactory $ 1.getObject（AbstractBeanFactory.java:302）在 org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton（DefaultSingletonBeanRegistry.java:228）在 org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:298）在 org.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:193）在 org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates（DefaultListableBeanFactory.java:1017）在 org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency（DefaultListableBeanFactory.java:960）在 org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency（DefaultListableBeanFactory.java:858）在 org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor $ AutowiredFieldElement.inject（AutowiredAnnotationBeanPostProcessor.java:480）在 org.springframework.beans.factory.annotation.InjectionMetadata.inject（InjectionMetadata.java:87）在 org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues（AutowiredAnnotationBeanPostProcessor.java:289）在 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean（AbstractAutowireCapableBeanFactory.java:1185）在 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:537）在 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:475）在 org.springframework.beans.factory.support.AbstractBeanFactory $ 1.getObject（AbstractBeanFactory.java:302）在 org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton（DefaultSingletonBeanRegistry.java:228）在 org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:298）在 org.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:193）在 org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates（DefaultListableBeanFactory.java:1017）在 org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency（DefaultListableBeanFactory.java:960）在 org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency（DefaultListableBeanFactory.java:858）在 org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor $ AutowiredFieldElement.inject（AutowiredAnnotationBeanPostProcessor.java:480）在 org.springframework.beans.factory.annotation.InjectionMetadata.inject（InjectionMetadata.java:87）在 org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues（AutowiredAnnotationBeanPostProcessor.java:289）在 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean（AbstractAutowireCapableBeanFactory.java:1185）在 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:537）在 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:475）在 org.springframework.beans.factory.support.AbstractBeanFactory $ 1.getObject（AbstractBeanFactory.java:302）在 org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton（DefaultSingletonBeanRegistry.java:228）在 org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:298）在 org.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:193）在 org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates（DefaultListableBeanFactory.java:1017）在 org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency（DefaultListableBeanFactory.java:960）在 org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency（DefaultListableBeanFactory.java:858）在 org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor $ AutowiredFieldElement.inject（AutowiredAnnotationBeanPostProcessor.java:480）在 org.springframework.beans.factory.annotation.InjectionMetadata.inject（InjectionMetadata.java:87）在 org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues（AutowiredAnnotationBeanPostProcessor.java:289）在 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean（AbstractAutowireCapableBeanFactory.java:1185）在 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:537）在 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:475）在 org.springframework.beans.factory.support.AbstractBeanFactory $ 1.getObject（AbstractBeanFactory.java:302）在 org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton（DefaultSingletonBeanRegistry.java:228）在 org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:298）在 org.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:193）在 org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons（DefaultListableBeanFactory.java:703）在 org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization（AbstractApplicationContext.java:760）在 org.springframework.context.support.AbstractApplicationContext.refresh（AbstractApplicationContext.java:482）在 org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext（FrameworkServlet.java:658）在 org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext（FrameworkServlet.java:624）在 org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext（FrameworkServlet.java:672）在 org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext（FrameworkServlet.java:543）在 org.springframework.web.servlet.FrameworkServlet.initServletBean（FrameworkServlet.java:484）在 org.springframework.web.servlet.HttpServletBean.init（HttpServletBean.java:136）在javax.servlet.GenericServlet.init（GenericServlet.java:158）at org.apache.catalina.core.StandardWrapper.initServlet（StandardWrapper.java:1269）在 org.apache.catalina.core.StandardWrapper.loadServlet（StandardWrapper.java:1182）在 org.apache.catalina.core.StandardWrapper.load（StandardWrapper.java:1072）在 org.apache.catalina.core.StandardContext.loadOnStartup（StandardContext.java:5368）在 org.apache.catalina.core.StandardContext.startInternal（StandardContext.java:5660）在 org.apache.catalina.util.LifecycleBase.start（LifecycleBase.java:145）在 org.apache.catalina.core.ContainerBase $ StartChild.call（ContainerBase.java:1571）在 org.apache.catalina.core.ContainerBase $ StartChild.call（ContainerBase.java:1561）在java.util.concurrent.FutureTask.run（未知来源）at java.util.concurrent.ThreadPoolExecutor.runWorker（未知来源）at java.util.concurrent.ThreadPoolExecutor $ Worker.run（未知来源）at java.lang.Thread.run（未知来源）

这是ma hibernate-persistent.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
    xmlns:p="http://www.springframework.org/schema/p" xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd">

    <!-- supply loc -->
    <context:property-placeholder 
    location="classpath:/database.properties" />
    <!-- DS bean -->
    <bean id="dataSource" 
    class="org.apache.commons.dbcp.BasicDataSource"
        p:driverClassName="${jdbc.driver}" p:url="${jdbc.url}" 
        p:username="${jdbc.username}"
        p:password="${jdbc.password}" 
        p:initialSize="1" p:maxActive="2"
        destroy-method="close">
    </bean>
    <!-- configure Hibernate 4 specific local session factory bean -->
    <bean id="sessionFactory"
        class="org.springframework.orm.hibernate4.LocalSessionFactoryBean"
        p:packagesToScan="com.app.dto" p:dataSource-ref="dataSource">
        <property name="hibernateProperties">
            <value>
                hibernate.dialect= org.hibernate.dialect.PostgreSQLDialect
                hibernate.format_sql=true
                hibernate.show_sql=true
                hibernate.hbm2ddl.auto=validate

            </value>

        </property>
            </bean>
    <!-- configure tx mgr bean -->

    <bean id="transactionManager"
        class="org.springframework.orm.hibernate4.HibernateTransactionManager"
        p:sessionFactory-ref="sessionFactory">
    </bean> <!-- enable tx annotation suuport -->
    <tx:annotation-driven />

</beans>

属性

jdbc.driver=org.postgresql.Driver
jdbc.url=jdbc:postgresql://127.0.0.1:5433/glofdata
jdbc.username=postgres
jdbc.password=postgres
jdbc.dialect=org.hibernate.dialect.PostgreSQLDialect

Answer 1

Hibernate不支持database arrays（例如java.sql.Array）

Hibernate提供的

array和primitive-array类型用于将Java数组映射到支持表 - 它们基本上是一对多/元素集合映射的变体。 / p>

这里是Postgresql的example，其中@Alex已经使用UserType for integer arrays自行解决了这个问题。此外，这个example 与使用hibernate映射postgres数组有关希望这会有所帮助。

Answer 2

尽管Hibernate本机不支持ARRAY类型，但是您可以为此使用hibernate-types项目。

现在，即使您使用的是hibernate-types提供的StringArrayType or IntArrayType，只要您使用的是JPQL，就可以正确解析数组类型。

仅当使用本机SQL时，No Dialect mapping for JDBC type问题才可能发生。要解决它，您必须选择：

您可以在方言级别注册缺少的JDBC类型：

public class PostgreSQL95ArrayDialect 
        extends PostgreSQL95Dialect {

    public PostgreSQL95ArrayDialect() {
        super();
        this.registerColumnType(Types.ARRAY, "array");
    }
}

并通过PostgreSQL95ArrayDialect配置属性注册hibernate.dialect。

您可以通过addScalar方法在查询级别注册类型：

String[] array = (String[]) entityManager
.createNativeQuery(
    "SELECT properties " +
    "FROM book " +
    "WHERE isbn = :isbn")
.setParameter("isbn", "978-9730228236")
.unwrap(org.hibernate.query.NativeQuery.class)
.addScalar("properties", StringArrayType.INSTANCE)
.getSingleResult();

有关更多详细信息，请查看this article。

如何修复Hibernate org.hibernate.MappingException：没有JDBC类型的Dialect映射：2003

2 个答案: