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

程序员文章站 2022-04-13 14:14:02
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在使用hibernate时,获取SessionFactory报一下错误


org.hibernate.HibernateException: Access to DialectResolutionInfo cannot be null when 'hibernate.dialect' not set
	at org.hibernate.engine.jdbc.dialect.internal.DialectFactoryImpl.determineDialect(DialectFactoryImpl.java:104)
	at org.hibernate.engine.jdbc.dialect.internal.DialectFactoryImpl.buildDialect(DialectFactoryImpl.java:71)
	at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:209)
	at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:111)
	at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:234)
	at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:206)
	at org.hibernate.cfg.Configuration.buildTypeRegistrations(Configuration.java:1887)
	at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1845)
	at com.ssh.registration.util.HibernateUtil.<clinit>(HibernateUtil.java:17)
	at com.ssh.registration.service.UserManager.exists(UserManager.java:26)
	at org.apache.jsp.RegisterDeal_jsp._jspService(RegisterDeal_jsp.java:100)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:439)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:218)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:110)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:506)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:962)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:445)
	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1115)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)
	at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2549)
	at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2538)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:619)

我在获得sessionFactory是从自己封装的工具类HibernateUtil类中获得的,HibernateUtil类的代码如下:


package com.ssh.registration.util;

import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.service.ServiceRegistryBuilder;

public class HibernateUtil {

	// static 就是单例了
	private static SessionFactory sf;
	private static Configuration configuration = new Configuration();
	private static ServiceRegistry serviceRegistry;
	static {
		serviceRegistry = new ServiceRegistryBuilder().applySettings(
				configuration.getProperties()).buildServiceRegistry();
		sf = configuration.buildSessionFactory(serviceRegistry);

	}

	public static SessionFactory getSessionFactory() {
		return sf;
	}
}

最后经过测试,终于发现,是我粗心漏写了一行造成的,


漏写代码如下:


configuration.configure();



完整的HibernateUtil代码如下:


package com.ssh.registration.util;

import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.service.ServiceRegistryBuilder;

public class HibernateUtil {

	// static 就是单例了
	private static SessionFactory sf;
	private static Configuration configuration = new Configuration();
	private static ServiceRegistry serviceRegistry;
	static {
		configuration.configure();
		serviceRegistry = new ServiceRegistryBuilder().applySettings(
				configuration.getProperties()).buildServiceRegistry();
		sf = configuration.buildSessionFactory(serviceRegistry);
	}

	public static SessionFactory getSessionFactory() {
		return sf;
	}
}



再次运行程序,发现正常了!!