hbm.xml 设置默认字段

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
	"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
	"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="com.jinkun.youdebao.bean">
   <class name="QuestionBean" table="question" dynamic-insert="true" dynamic-update="true"  > 
        <id name="questionId" type="int" column="question_id" >
      		<generator class="increment"></generator>
       </id>
     <version name="questionVersion" column="question_version" type="integer"></version> 
       <property name="questionIp" type="string" column="question_ip"/>
       <property name="questionBusiness" type="int" column="question_business"/>
       <property name="questionContent" type="text" column="question_content"/>
        <property name="questionEndtime" type="timestamp" column="question_endtime"/>
       <property name="questionNetwork" type="int" column="question_network"/>
        <property name="questionSort" type="string" column="question_sort"/>
       <property name="questionStatus" type="string" >
       			<column name="question_status" default="n"/>   
       </property>
       <property name="questionTime" type="timestamp" column="question_time"/>
 
        <set name="answerset"   table="answer"  inverse="true" >
    		<key column="question_id"></key>
    		<one-to-many class="AnswerBean"/>
        </set>
 
    </class>
   
</hibernate-mapping>