当没有可用连接时，必须设置“Hibernate.Dialke”

Question

我已经运行了数据库，并且可以使用swing GUI连接到它。但当我尝试运行我的应用程序时，我得到一个启动错误。以下是详细内容：

1：错误-

信息：初始化Spring根WebApplicationContext[ERROR][pool-2-thread-1 05:20:08](JDBCExceptionReporter.java:LogException:101)无法从基础数据库获取连接！[错误][pool-2-thread-1 05:20:08]（ContextLoader.java：InitWebApplicationContext:220)上下文初始化失败org.springFramework.Beans.Factory.BeanCreationException：创建ServletContext资源[/WEB-INF/Hibernate-Context.xml]中定义的名称为“会话工厂”的bean时出错：调用init方法失败；嵌套异常为org.hibernate.hibernateException：当org.springframework.beans.factory.support.abstractautowirecapablebeanfactory.initializeBean（abstractautowirecapablebeanfactory.java:1420)（org.springframework.beans.factory.support.abstractautowirecapablebeanfactory.docreateBean（abstractautowirecapablebeanfactory.519）没有连接可用

2:hibernate-context.xml-

<tx:annotation-driven transaction-manager="transactionManager" />

<bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
    <property name="dataSource" ref="dataSource" />
    <property name="packagesToScan" value="com.gleeb.sample.model" />
    <property name="hibernateProperties">
        <props>
            <!-- <prop key="dialect">org.hibernate.dialect.MySQL5InnoDBDialect</prop> -->
            <prop key="dialect">org.hibernate.dialect.HSQLDialect</prop>
            <prop key="show_sql">false</prop>
            <prop key="hbm2ddl.auto">create</prop>
        </props>
    </property>
</bean>

        <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
    destroy-method="close" p:driverClass="org.hsqldb.jdbc.JDBCDriver"
    p:jdbcUrl="jdbc:hsqldb:hsql://localhost/testdb" p:user="sa"
    p:password="" p:acquireIncrement="5" p:idleConnectionTestPeriod="60"
    p:maxPoolSize="100" p:maxStatements="50" p:minPoolSize="10" />

<!-- Declare a transaction manager -->
<bean id="transactionManager"
    class="org.springframework.orm.hibernate3.HibernateTransactionManager"
    p:sessionFactory-ref="sessionFactory" />

Answer 1

据我所知，不可能将方言作为Spring会话工厂的hibernateProperties字段上设置的值传递进来，至少如果您还在该字段上使用configLocation属性的话。

My hibernate.cfg.xml：

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>

    <property name="hibernate.dialect">org.hibernate.dialect.DB2Dialect</property>
    <property name="hibernate.search.autoregister_listeners">false</property>
    [etc...]

我的相关会话工厂上下文配置：

<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
    <property name="configLocation">
        <value>classpath:hibernate.cfg.xml</value>
    </property>
    <property name="dataSource" ref="dataSource"/>
       <property name="hibernateProperties">
        <props>
            <!--<prop key="hibernate.dialect">org.hibernate.dialect.DB2Dialect</prop>-->
            <prop key="hibernate.show_sql">true</prop>
            <prop key="hibernate.format_sql">true</prop>
            <prop key="hibernate.generate_statistics">false</prop>
            <prop key="hibernate.default_schema">xxx</prop>
        </props>
    </property>
</bean>

Caused by: org.hibernate.HibernateException: Connection cannot be null when 'hibernate.dialect' not set