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数组-如何修复Hibernate org.hibernate.MappingException：没有JDBC类型的方言映射：2003

分类：Postgre SQL作者：编程之家原文地址

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;
    }

试图访问具有double数组的db,我已经为其编写了用户类型class :::

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 };
    }
}

但是它给出错误为:::

org.hibernate.MappingException: No Dialect mapping for JDBC type: 2003
at 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)
at
org.hibernate.tool.hbm2ddl.SchemaValidator.validate(SchemaValidator.java:155)
at
org.hibernate.internal.SessionFactoryImpl.(SessionFactoryImpl.java:506)
at
org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1750)
at
org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1788)
at
org.springframework.orm.hibernate4.LocalSessionFactoryBuilder.buildSessionFactory(LocalSessionFactoryBuilder.java:343)
at
org.springframework.orm.hibernate4.LocalSessionfactorybean.buildSessionFactory(LocalSessionfactorybean.java:431)
at
org.springframework.orm.hibernate4.LocalSessionfactorybean.afterPropertiesSet(LocalSessionfactorybean.java:416)
at
org.springframework.beans.factory.support.AbstractAutowireCapablebeanfactory.invokeInitMethods(AbstractAutowireCapablebeanfactory.java:1612)
at
org.springframework.beans.factory.support.AbstractAutowireCapablebeanfactory.initializeBean(AbstractAutowireCapablebeanfactory.java:1549)
at
org.springframework.beans.factory.support.AbstractAutowireCapablebeanfactory.doCreateBean(AbstractAutowireCapablebeanfactory.java:539)
at
org.springframework.beans.factory.support.AbstractAutowireCapablebeanfactory.createBean(AbstractAutowireCapablebeanfactory.java:475)
at
org.springframework.beans.factory.support.Abstractbeanfactory$1.getobject(Abstractbeanfactory.java:302)
at
org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
at
org.springframework.beans.factory.support.Abstractbeanfactory.doGetBean(Abstractbeanfactory.java:298)
at
org.springframework.beans.factory.support.Abstractbeanfactory.getBean(Abstractbeanfactory.java:193)
at
org.springframework.beans.factory.support.DefaultListablebeanfactory.findAutowireCandidates(DefaultListablebeanfactory.java:1017)
at
org.springframework.beans.factory.support.DefaultListablebeanfactory.doResolveDependency(DefaultListablebeanfactory.java:960)
at
org.springframework.beans.factory.support.DefaultListablebeanfactory.resolveDependency(DefaultListablebeanfactory.java:858)
at
org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:480)
at
org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)
at
org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcesspropertyValues(AutowiredAnnotationBeanPostProcessor.java:289)
at
org.springframework.beans.factory.support.AbstractAutowireCapablebeanfactory.populateBean(AbstractAutowireCapablebeanfactory.java:1185)
at
org.springframework.beans.factory.support.AbstractAutowireCapablebeanfactory.doCreateBean(AbstractAutowireCapablebeanfactory.java:537)
at
org.springframework.beans.factory.support.AbstractAutowireCapablebeanfactory.createBean(AbstractAutowireCapablebeanfactory.java:475)
at
org.springframework.beans.factory.support.Abstractbeanfactory$1.getobject(Abstractbeanfactory.java:302)
at
org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
at
org.springframework.beans.factory.support.Abstractbeanfactory.doGetBean(Abstractbeanfactory.java:298)
at
org.springframework.beans.factory.support.Abstractbeanfactory.getBean(Abstractbeanfactory.java:193)
at
org.springframework.beans.factory.support.DefaultListablebeanfactory.findAutowireCandidates(DefaultListablebeanfactory.java:1017)
at
org.springframework.beans.factory.support.DefaultListablebeanfactory.doResolveDependency(DefaultListablebeanfactory.java:960)
at
org.springframework.beans.factory.support.DefaultListablebeanfactory.resolveDependency(DefaultListablebeanfactory.java:858)
at
org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:480)
at
org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)
at
org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcesspropertyValues(AutowiredAnnotationBeanPostProcessor.java:289)
at
org.springframework.beans.factory.support.AbstractAutowireCapablebeanfactory.populateBean(AbstractAutowireCapablebeanfactory.java:1185)
at
org.springframework.beans.factory.support.AbstractAutowireCapablebeanfactory.doCreateBean(AbstractAutowireCapablebeanfactory.java:537)
at
org.springframework.beans.factory.support.AbstractAutowireCapablebeanfactory.createBean(AbstractAutowireCapablebeanfactory.java:475)
at
org.springframework.beans.factory.support.Abstractbeanfactory$1.getobject(Abstractbeanfactory.java:302)
at
org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
at
org.springframework.beans.factory.support.Abstractbeanfactory.doGetBean(Abstractbeanfactory.java:298)
at
org.springframework.beans.factory.support.Abstractbeanfactory.getBean(Abstractbeanfactory.java:193)
at
org.springframework.beans.factory.support.DefaultListablebeanfactory.findAutowireCandidates(DefaultListablebeanfactory.java:1017)
at
org.springframework.beans.factory.support.DefaultListablebeanfactory.doResolveDependency(DefaultListablebeanfactory.java:960)
at
org.springframework.beans.factory.support.DefaultListablebeanfactory.resolveDependency(DefaultListablebeanfactory.java:858)
at
org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:480)
at
org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)
at
org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcesspropertyValues(AutowiredAnnotationBeanPostProcessor.java:289)
at
org.springframework.beans.factory.support.AbstractAutowireCapablebeanfactory.populateBean(AbstractAutowireCapablebeanfactory.java:1185)
at
org.springframework.beans.factory.support.AbstractAutowireCapablebeanfactory.doCreateBean(AbstractAutowireCapablebeanfactory.java:537)
at
org.springframework.beans.factory.support.AbstractAutowireCapablebeanfactory.createBean(AbstractAutowireCapablebeanfactory.java:475)
at
org.springframework.beans.factory.support.Abstractbeanfactory$1.getobject(Abstractbeanfactory.java:302)
at
org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
at
org.springframework.beans.factory.support.Abstractbeanfactory.doGetBean(Abstractbeanfactory.java:298)
at
org.springframework.beans.factory.support.Abstractbeanfactory.getBean(Abstractbeanfactory.java:193)
at
org.springframework.beans.factory.support.DefaultListablebeanfactory.preInstantiateSingletons(DefaultListablebeanfactory.java:703)
at
org.springframework.context.support.AbstractApplicationContext.finishbeanfactoryInitialization(AbstractApplicationContext.java:760)
at
org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
at
org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:658)
at
org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:624)
at
org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:672)
at
org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:543)
at
org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:484)
at
org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136)
at javax.servlet.GenericServlet.init(GenericServlet.java:158) at
org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1269)
at
org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1182)
at
org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1072)
at
org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5368)
at
org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5660)
at
org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
at
org.apache.catalina.core.ContainerBase$startChild.call(ContainerBase.java:1571)
at
org.apache.catalina.core.ContainerBase$startChild.call(ContainerBase.java:1561)
at java.util.concurrent.FutureTask.run(UnkNown Source) at
java.util.concurrent.ThreadPoolExecutor.runWorker(UnkNown Source) at
java.util.concurrent.ThreadPoolExecutor$Worker.run(UnkNown Source) at
java.lang.Thread.run(UnkNown Source)

这是一个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

解决方法:

Hibernate不支持数据库数组(例如java.sql.Array)

Hibernate提供的array和基本数组类型用于将Java数组映射到支持表中-它们基本上是一对多/元素集合映射的变体.

这是Postgresql的example,其中@Alex自己使用UserType整数数组来解决此问题.另外,此example 与使用休眠映射postgres数组有关.
希望这可以帮助.

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