hibernate错误this instance does not yet exist as a row in the database
session.save(blackList);
session.refresh(blackList);
执行这上面代码报错,this instance does not yet exist as a row in the database
xml
<hibernate-mapping>
<class name="com.BlackList" table="blacklist">
<id name="id" type="java.lang.Long">
<column name="ID" />
<generator class="native" />
</id>
<many-to-one name="user" column = "USERID" class = "com.User"></many-to-one>
<many-to-one name="appInfo" column = "APPID" class = "com.AppInfo"></many-to-one>
</class>
</hibernate-mapping>
不知道怎么解决