Attribute "column" must be declared for element type "property"解决办法

hibernate，自己写的xxx.hbm.xml文件 出现错误：
Attribute "column" must be declared for element type "property"

   头部文件为hibernate.cfg.xml的：
<?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">

   这个应该改为mapping的头文件就行了
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
          "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
          "http://hibernate.sourceforge.net /hibernate-mapping-3.0.dtd">
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