hibernate如何自动建表?

两种方法:
一种是hibernate.cfg.xml设置下:<property name="hbm2ddl.auto">create</property>
一种是用代码写法:public class ExportDB { public static void main(String[] args) {

//读取hibernate.cfg.xml文件
Configuration cfg = new Configuration().configure();

SchemaExport export = new SchemaExport(cfg);

export.create(true, true);
}
}

运行的时候只运行tomcat就能自动生成?还是要运行别的文件?

是啊,我是个初学者,还没学过hibernate,但是我要调试个别人给我的代码,这代码是通过hibernate自动建表的,我只运行了tomcat但是oracle中没有建表啊,我想是不是还应该运行下别的哪个东西才行呢?代码应该是没有错误的!!!高手来帮我啊!!!!

Hibernate 自动建表对于初学者来说不推荐，企业中用的最多的是
    SchemaExport export = new SchemaExport(cfg);

        export.create(true, true);
除非你到了一定的级别才让你做配制文件这块！

SchemaExport export = new SchemaExport(
new Configuration().configure());
export.create(true, true);

2009-4-25 21:35:07 org.apache.catalina.core.AprLifecycleListener lifecycleEvent
信息: The Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: D:\Myeclipse\bin;D:\apache-tomcat-5.5.20\bin
2009-4-25 21:35:07 org.apache.coyote.http11.Http11BaseProtocol init
信息: Initializing Coyote HTTP/1.1 on http-8080
2009-4-25 21:35:07 org.apache.catalina.startup.Catalina load
信息: Initialization processed in 1936 ms
2009-4-25 21:35:07 org.apache.catalina.core.StandardService start
信息: Starting service Catalina
2009-4-25 21:35:07 org.apache.catalina.core.StandardEngine start
信息: Starting Servlet Engine: Apache Tomcat/5.5.20
2009-4-25 21:35:08 org.apache.catalina.core.StandardHost start
信息: XML validation disabled
log4j:WARN No appenders could be found for logger (org.apache.commons.digester.Digester.sax).
log4j:WARN Please initialize the log4j system properly.
2009-4-25 21:35:10 org.apache.catalina.core.StandardContext start
严重: Error filterStart
2009-4-25 21:35:10 org.apache.catalina.core.StandardContext start
严重: Context [/Air] startup failed due to previous errors
2009-4-25 21:35:10 org.apache.catalina.core.ApplicationContext log
信息: org.apache.webapp.balancer.BalancerFilter: init(): ruleChain: [org.apache.webapp.balancer.RuleChain: [org.apache.webapp.balancer.rules.URLStringMatchRule: Target string: News / Redirect URL: http://www.cnn.com], [org.apache.webapp.balancer.rules.RequestParameterRule: Target param name: paramName / Target param value: paramValue / Redirect URL: http://www.yahoo.com], [org.apache.webapp.balancer.rules.AcceptEverythingRule: Redirect URL: http://jakarta.apache.org]]
2009-4-25 21:35:10 org.apache.catalina.core.ApplicationContext log
信息: ContextListener: contextInitialized()
2009-4-25 21:35:10 org.apache.catalina.core.ApplicationContext log
信息: SessionListener: contextInitialized()
2009-4-25 21:35:11 org.apache.catalina.core.ApplicationContext log
信息: ContextListener: contextInitialized()
2009-4-25 21:35:11 org.apache.catalina.core.ApplicationContext log
信息: SessionListener: contextInitialized()
log4j:WARN No appenders could be found for logger (org.apache.commons.digester.Digester.sax).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN No appenders could be found for logger (org.apache.commons.digester.Digester.sax).
log4j:WARN Please initialize the log4j system properly.
2009-4-25 21:35:20 org.apache.coyote.http11.Http11BaseProtocol start
信息: Starting Coyote HTTP/1.1 on http-8080
2009-4-25 21:35:21 org.apache.jk.common.ChannelSocket init
信息: JK: ajp13 listening on /0.0.0.0:8009
2009-4-25 21:35:21 org.apache.jk.server.JkMain start
信息: Jk running ID=0 time=0/94 config=null
2009-4-25 21:35:21 org.apache.catalina.storeconfig.StoreLoader load
信息: Find registry server-registry.xml at classpath resource
2009-4-25 21:35:21 org.apache.catalina.startup.Catalina start
信息: Server startup in 14045 ms
就是这个错误!谁知道是怎么回事啊?

帮你顶一下吧我也遇到同样的问题 mysql数据库只不过控制台显示了2条sql语句 create ... 但是数据库里只生成了一个表 ... 郁闷啊

调试易

hibernate如何自动建表?

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