在Hibernate的XML配置文件中指定默认值 [英] Specify default value in Hibernate's XML configuration file

问题描述

 < class name =Persontable =person > 
< id name =idcolumn =idtype =long/> 
< property name =namecolumn =nametype =string/> 
< property name =agecolumn =agetype =integer/> 
< / class> 
  

如何将 age 设为可空并且默认为空？

解决方案

 < property name =agetype =整数> 
< column name =agenot-null =falsedefault =null/> 
< / property> 
  

I'm configuring Hibernate via the mapping configuration file.

<class name="Person" table="person">
    <id name="id" column="id" type="long"/>
    <property name="name" column="name" type="string"/>
    <property name="age" column="age" type="integer"/>
</class>

How do I set age to be nullable and default to null?

解决方案

<property name="age" type="integer">
  <column name="age" not-null="false" default="null" />
</property>

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