hibernate之无法解析hibernate.cfg.xml

刚开始学习hibernate，在写完java对象、配置hibernate相关xml后，通过客户端调用时，程序报出以下异常： 

Exception in thread "main" org.hibernate.HibernateException: Could not parse configuration: /hibernate.cfg.xml
 at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:2013)
 at org.hibernate.cfg.Configuration.configure(Configuration.java:1925)
 at org.hibernate.cfg.Configuration.configure(Configuration.java:1904)
 at com.lvaj.examples.example1.Client.main(Client.java:10)
Caused by: org.dom4j.DocumentException: Error on line 4 of document  : The system identifier must begin with either a single or double quote character. Nested exception: The system identifier must begin with either a single or double quote character.
 at org.dom4j.io.SAXReader.read(SAXReader.java:482)
 at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:2005)
 ... 3 more

根据异常内容在hibernate.cfg.xml文件排查，最后发现原来是犯了一个低级错误，即hibernate.cfg.xml文件的头部分漏写了。原内容（错误内容）为：

<!DOCTYPE hibernate-configuration PUBLIC
	"-//Hibernate/Hibernate Configuration DTD 3.0//EN"

正确的头内容为：

<!DOCTYPE hibernate-configuration PUBLIC
	"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
	"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">

果然是细节决定成败啊！