新手请教：Could not parse configuration: /hibernate.cfg.xml
才开始学hibernate，对着网上的一个小例子操作。结果出现如下问题：

Java code

log4j:WARN No appenders could be found for logger (org.hibernate.cfg.Environment).
log4j:WARN Please initialize the log4j system properly.
org.hibernate.HibernateException: Could not parse configuration: /hibernate.cfg.xml
    at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1380)
    at org.hibernate.cfg.Configuration.configure(Configuration.java:1314)
    at org.hibernate.cfg.Configuration.configure(Configuration.java:1300)
    at com.elva.hibernate.UserTest.main(UserTest.java:7)
Caused by: org.dom4j.DocumentException: Error on line 11 of document  : The string "--" is not permitted within comments. Nested exception: The string "--" is not permitted within comments.
    at org.dom4j.io.SAXReader.read(SAXReader.java:482)
    at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1370)
    ... 3 more

一直找不到原因，请高手不吝赐教！谢谢！
配置文件：
User.hbm.xml

XML code

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping> 
<class name="com.elva.hibernate.User" table="myusertable">
   <id name="id"><generator class="identity" /></id>
   <property name="username" type="string" />
   <property name="password" type="string" />
   <property name="email" type="string" />
</class>
</hibernate-mapping>

hibernate.cfg.xml
[code=XML]
<?xml version='1.0' encoding='utf-8'?> 
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
  <!-- Database connection settings -->
  <property name="connection.driver_class">com.mysql.jdbc.Driver </property>
  <property name="connection.url">jdbc:mysql://localhost:3306/test</property>
  <property name="connection.username">root</property>
  <property name="connection.password">root</property>
   
  <!-- JDBC connection pool (use the built-in)--<property name="hibernate.connection.pool_size">1</property>
   
  <!-- SQL dialect -->
  <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
   
  <!-- Enable Hibernate's automatic session context management--<property name="current_session_context_class">thread</property>

  <!-- Disable the second-level cache --<property name="cache.provider_class">
  org.hibernate.cache.NoCacheProvider</property>
   
  <!-- Echo all executed SQL to stdout -->
  <property name="show_sql">true</property>
   
  <!-- Drop and re-create the database schema on startup--<property name="hbm2ddl.auto">c