实现Hibernate新增的时候出现错误？？？

错误代码：

log4j:WARN No appenders could be found for logger (org.hibernate.cfg.Environment).
log4j:WARN Please initialize the log4j system properly.
Exception in thread "main" 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:426)
 at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:128)
 at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2009)
 at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1292)
 at org.hibernate.demo.ceshi.main(ceshi.java:16)

您的Hibernate configuration文件中没有设置dialect这个property。这里是我常用的hibernate.cfg.xml文件中的一句供您参考，您可以根据您自己的文件格式改：
    <property name="dialect">org.hibernate.dialect.OracleDialect</property>