用Eclipse开发java项目，出现以下错误应该怎么调试呢
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[待解决问题]
最近在学习Java开发，使用的是Eclipse工具，但是遇到以下问题，解决不了，请前辈指点迷津！！！！谢谢啊
log4j:WARN No appenders could be found for logger (org.hibernate.cfg.Environment).
log4j:WARN Please initialize the log4j system properly.
Exception in thread "AWT-EventQueue-0" java.lang.ExceptionInInitializerError
at org.hibernate.cfg.Configuration.reset(Configuration.java:174)
at org.hibernate.cfg.Configuration.<init>(Configuration.java:193)
at org.hibernate.cfg.Configuration.<init>(Configuration.java:197)
at com.mwq.hibernate.HibernateSessionFactory.<clinit>(HibernateSessionFactory.java:16)
at com.mwq.hibernate.BaseDao.queryList(BaseDao.java:29)
at com.mwq.hibernate.Dao.queryManagerOfNatural(Dao.java:141)
at com.mwq.frame.LandFrame.<init>(LandFrame.java:100)
at com.mwq.PersonnelManage.land(PersonnelManage.java:30)
at com.mwq.PersonnelManage$1.run(PersonnelManage.java:24)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
Caused by: java.lang.NullPointerException
at org.hibernate.util.ConfigHelper.getResourceAsStream(ConfigHelper.java:144)
at org.hibernate.cfg.Environment.<clinit>(Environment.java:529)
... 17 more
所有回答(2)
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at com.mwq.hibernate.BaseDao.queryList(BaseDao.java:29)
你这个方法错了，具体怎么错你的日志log4j:WARN Please initialize the log4j system properly.
先配下日志
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在项目的classpath路径下(src目录下)添加一个log4j.properties文件
log4j.rootLogger=INFO,CONSOLE,FILE
log4j.addivity.org.apache=true
# 应用于控制台
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.Threshold=INFO
log4j.appender.CONSOLE.Target=System.out
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=[framework] %d - %c -%-4r [%t] %-5p %c %x - %m%n
#log4j.appender.CONSOLE.layout.ConversionPattern=[start]%d{DATE}[DATE]%n%p[PRIORITY]%n%x[NDC]%n%t[THREAD] n%c[CATEGORY]%n%m[MESSAGE]%n%n
#应用于文件
log4j.appender.FILE=org.apache.log4j.DailyRollingFileAppender
log4j.appender.FILE.File=webAPP.log
log4j.appender.FILE.Append=false
log4j.appender.FILE.layout=org.apache.log4j.PatternLayout
log4j.appender.FILE.layout.ConversionPattern=[framework] %d - %c -%-4r [%t] %-5p %c %x - %m%n
还有空指针异常：BaseDao.java:29行，调用了一个未初始化对象的方法。
