晚上还可以启动的项目，第二天就启动不起来了，
报出错误：The markup declarations contained or pointed to by the document type declaration must be well-formed. Nested exception: The markup declarations contained or pointed to by the document type declaration must be well-formed.
也没有改过什么。就是启不来，找了半天
原因为：
<hibernate-mapping package="com.demo.hibernate.beans">
<class name="User" table="user">
<id name="id" column="ID" type="integer">
<generator class="native"/>
</id>
<property name="username" column="username" type="String" />
<property name="password" column="password" type="String" />
<property name="email" column="email" type="String" />
</class>
</hibernate-mapping>
把 type="String"----->type="java.lang.String"
搞定~~~