我在使用 Spring 的propertiesPlaceholderConfigurer 配置 Hibernate 时遇到了麻烦。我有一个文件 db.properties，其中包含带有数据库设置的键值对。现在我需要在 Spring 的 applicationContext.xml 文件中配置 Hibernate。
但我不断收到错误消息:
javax.faces.el.EvaluationException: java.lang.ExceptionInInitializerError
at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:101)
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
at javax.faces.component.UICommand.broadcast(UICommand.java:315)
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:790)
at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1282)
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:646)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:374)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.ExceptionInInitializerError
at com.dataart.mediaportal.db.HibernateUtil.buildSessionFactory(HibernateUtil.java:15)
at com.dataart.mediaportal.db.HibernateUtil.<clinit>(HibernateUtil.java:8)
at com.dataart.mediaportal.dao.impl.UserDAOImpl.login(UserDAOImpl.java:45)
at com.dataart.mediaportal.controller.bean.LoginBean.authorize(LoginBean.java:42)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.el.parser.AstValue.invoke(AstValue.java:278)
at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:274)
at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)
at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:87)
... 27 more
Caused by: org.hibernate.HibernateException: Hibernate Dialect must be explicitly set
at org.hibernate.dialect.DialectFactory.determineDialect(DialectFactory.java:57)
at org.hibernate.dialect.DialectFactory.buildDialect(DialectFactory.java:39)
at org.hibernate.cfg.SettingsFactory.determineDialect(SettingsFactory.java:409)
at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:119)
at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2006)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1289)
at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:915)
at com.dataart.mediaportal.db.HibernateUtil.buildSessionFactory(HibernateUtil.java:12)
... 38 more
这是我的 applicationContext.xml:
<?xml version="1.0" encoding="windows-1252"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:lang="http://www.springframework.org/schema/lang"
xmlns:osgi="http://www.springframework.org/schema/osgi"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-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/lang http://www.springframework.org/schema/lang/spring-lang-3.2.xsd
http://www.springframework.org/schema/osgi http://www.springframework.org/schema/osgi/spring-osgi-1.2.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.2.xsd
">
<context:component-scan base-package="com.dataart.mediaportal" />
<!-- DATA SOURCE AND PERSISTENCE SETTINGS-->
<bean id="propertiesPlaceholderConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<value>classpath:db.properties</value>
</list>
</property>
</bean>
<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="dmDataSource"/>
<property name="packagesToScan" value="com.dataart.mediaportal"/>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">${db.dialect}</prop>
<prop key="hibernate.show_sql">${db.show_sql}</prop>
<prop key="hibernate.hbm2ddl.import_files">${db.import_files}</prop>
<prop key="hibernate.hbm2ddl.auto">${db.hbm2ddl_auto}</prop>
<prop key="connection.pool_size">${db.pool_size}</prop>
<prop key="current_session_context_class">${db.current_session_context_class}</prop>
<prop key="hibernate.cache.provider_class">${db.provider_class}</prop>
<prop key="hibernate.cache.use_second_level_cache">${db.use_second_level_cache}</prop>
<prop key="hibernate.cache.use_query_cache">${db.use_query_cache}</prop>
</props>
</property>
</bean>
<bean id="tm" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory"/>
</bean>
<bean id="dmDataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource" destroy-method="close">
<property name="driverClassName" value="${db.driver}" />
<property name="url" value="${db.url}" />
<property name="username" value="${db.username}" />
<property name="password" value="${db.password}" />
<property name="maxActive" value="5" />
<property name="maxWait" value="5000" />
</bean>
</beans>
数据库属性:
db.username=postgres
db.password=4351
db.driver=org.postgresql.Driver
db.url=jdbc:postgresql://localhost/MediaPortalDB
db.pool_size=1
db.dialect=org.hibernate.dialect.PostgreSQLDialect
db.import_files=import.sql
db.hbm2ddl_auto=create
db.use_query_cache=true
db.use_second_level_cache=true
db.provider_class=org.hibernate.cache.HashtableCacheProvider
db.show_sql=true
db.current_session_context_class=thread
如果有人能指出解决方案或告诉我这里可能出了什么问题，我将非常感激。
提前致谢。
纳扎尔。
最佳答案
似乎您缺少一种方言:
Caused by: org.hibernate.HibernateException: Hibernate Dialect must be explicitly set
添加此内容可能会有所帮助:
<prop key="hibernate.dialect">
org.hibernate.dialect.SQLServerDialect //add your specific dialect
</prop>
它是 hibernate 属性之一。
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">${db.dialect}</prop>
<prop key="hibernate.show_sql">${db.show_sql}</prop>
<prop key="hibernate.hbm2ddl.import_files">${db.import_files}</prop>
<prop key="hibernate.hbm2ddl.auto">${db.hbm2ddl_auto}</prop>
<prop key="connection.pool_size">${db.pool_size}</prop>
<prop key="current_session_context_class">${db.current_session_context_class}</prop>
<prop key="hibernate.cache.provider_class">${db.provider_class}</prop>
<prop key="hibernate.cache.use_second_level_cache">${db.use_second_level_cache}</prop>
<prop key="hibernate.cache.use_query_cache">${db.use_query_cache}</prop>
</props>
</property>
将其放入您的属性中:
db.dialect=org.hibernate.dialect.PostgreSQLDialect
如何加载属性文件:
<bean id="propertyConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"
p:location="/WEB-INF/connection.properties" />
session 工厂的示例:
<bean id="XXX" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"
p:dataSource-ref="XXX" >
<property name="annotatedClasses">
<list>
<value>XXX</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">
XXX
</prop>
<prop key="hibernate.show_sql">false</prop>
</props>
</property>
</bean>
这是 session 工厂声明的重要部分:
AnnotationSessionFactoryBean
关于java - 使用 ApplicationContext.xml 配置 hibernate 时出错，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/17941063/