因为设错地方了！
错误--写在了property标签里
<property name="password" type="string" length="40" not-null="true"> <column name="password" ></column> </property>正确--写在column标签里
开始做，坚持做，重复做<property name="password" type="string" > <column name="password" length="40" not-null="true"></column> </property>
