【方言】Access to DialectResolutionInfo cannot be null when 'hibernate.dialect' not set

时间：2022-11-29 23:00:14

Access to DialectResolutionInfo cannot be null when 'hibernate.dialect' not set

几种 方言配置差异

<?xml version="1.0" encoding="UTF-8"?>

<persistence xmlns="http://java.sun.com/xml/ns/persistence" version="2.0">

    <persistence-unit name="userPU" transaction-type="RESOURCE_LOCAL">

        <!--jpa的提供者-->

        <provider>org.hibernate.ejb.HibernatePersistence</provider>

        <properties>

            <!--声明数据库连接的驱动-->

            <property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver"/>

            <!--jdbc数据库的连接地址-->

            <property name="hibernate.connection.url" value="jdbc:mysql://10.32.11.74:3306/jparest"/>

            <property name="hibernate.connection.username" value="root"/>

            <property name="hibernate.connection.password" value="123456"/>

            <!--配置方言-->

            <property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5Dialect"/>

            <!--激活查询日志功能-->

            <property name="hibernate.show_sql" value="true"/>

            <!--优雅地输出Sql-->

            <property name="hibernate.format_sql" value="true"/>

            <!--添加一条解释型标注-->

            <property name="hibernate.use_sql_comments" value="false"/>

            <!--配置如何根据java模型生成数据库表结构,常用update,validate-->

            <property name="hibernate.hbm2ddl.auto" value="update"/>

        </properties>

    </persistence-unit>

</persistence>
 <property name="jpaVendorAdapter">

            <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">

                <property name="showSql" value="${hibernate.showSql}" />

                <property name="generateDdl" value="true" />

                <property name="databasePlatform"

                          value="org.hibernate.dialect.MySQL5Dialect">

                </property>

            </bean>

        </property>
<beans>

<bean id="entityManagerFactory"class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">

<property name="dataSource" ref="dataSource"/>

<property name="jpaVendorAdapter">

<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">

<property name="generateDdl" value="true"/>

<property name="database" value="HSQL"/>

</bean>

</property>

<property name="persistenceUnitName" value="jpa.sample"/>

</bean>

<bean id="transactionManager"class="org.springframework.orm.jpa.JpaTransactionManager">

<property name="entityManagerFactory" ref="entityManagerFactory"/>

</bean>

<jdbc:embedded-database id="dataSource" type="HSQL"/>

<jpa:repositories base-package="org.springframework.data.jpa.example.repository.simple"/>

</beans>

RDBMS 方言

DB2 org.hibernate.dialect.DB2Dialect
DB2 AS/400 org.hibernate.dialect.DB2400Dialect
DB2 OS390 org.hibernate.dialect.DB2390Dialect
PostgreSQL org.hibernate.dialect.PostgreSQLDialect
MySQL org.hibernate.dialect.MySQLDialect
MySQL with InnoDB org.hibernate.dialect.MySQLInnoDBDialect
MySQL with MyISAM org.hibernate.dialect.MySQLMyISAMDialect
Oracle (any version) org.hibernate.dialect.OracleDialect
Oracle 9i/10g org.hibernate.dialect.Oracle9Dialect
Sybase org.hibernate.dialect.SybaseDialect
Sybase Anywhere org.hibernate.dialect.SybaseAnywhereDialect
Microsoft SQL Server org.hibernate.dialect.SQLServerDialect
SAP DB org.hibernate.dialect.SAPDBDialect
Informix org.hibernate.dialect.InformixDialect
HypersonicSQL org.hibernate.dialect.HSQLDialect
Ingres org.hibernate.dialect.IngresDialect
Progress org.hibernate.dialect.ProgressDialect
Mckoi SQL org.hibernate.dialect.MckoiDialect
Interbase org.hibernate.dialect.InterbaseDialect
Pointbase org.hibernate.dialect.PointbaseDialect
FrontBase org.hibernate.dialect.FrontbaseDialect
Firebird

org.hibernate.dialect.FirebirdDialect

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