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之前做的这个demo现在下载下来部署上之后一直出现这错误。

Caused by: java.lang.NoSuchMethodError: org.apache.log4j.Logger.isTraceEnabled()Z    at org.slf4j.impl.Log4jLoggerAdapter.isTraceEnabled(Log4jLoggerAdapter.java:81)    at org.hibernate.type.NullableType.
   
    (NullableType.java:59)    at org.hibernate.Hibernate.
    
     (Hibernate.java:103)    at org.hibernate.type.TypeFactory.
     
      (TypeFactory.java:69)    at org.hibernate.mapping.SimpleValue.getType(SimpleValue.java:283)    at org.hibernate.mapping.SimpleValue.isValid(SimpleValue.java:276)    at org.hibernate.mapping.Property.isValid(Property.java:207)    at org.hibernate.mapping.PersistentClass.validate(PersistentClass.java:458)    at org.hibernate.mapping.RootClass.validate(RootClass.java:215)    at org.hibernate.cfg.Configuration.validate(Configuration.java:1135)    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1320)    at org.springframework.orm.hibernate3.LocalSessionFactoryBean.newSessionFactory(LocalSessionFactoryBean.java:814)    at org.springframework.orm.hibernate3.LocalSessionFactoryBean.buildSessionFactory(LocalSessionFactoryBean.java:732)    at org.springframework.orm.hibernate3.AbstractSessionFactoryBean.afterPropertiesSet(AbstractSessionFactoryBean.java:211)    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1369)    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1335)    ... 55 more
     
    
   

仔细一看提示就是这个slf4j出现了问题，提示没有这个方法，所以最后重新下载了之后贴进去，就没有问题了。以后遇到错误要仔细看一下。

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