设定hibernate里面的时间字段为自动生成

1.设置字段：birthday timestamp CURRENT_TIMESTAMP

2.设置动态插入不需要手动输入

<class name="com.dada.pojo.Test" table="T_REP_FORM" dynamic-insert="true" dynamic-update="true">

3.需要注意的是作为自动插入的字段，它如果是必填字段，那么需要在配置文件中把not-null="true"属性给去掉，否则还是会报not-null property references a null or transient value:错误

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated 2012-9-13 19:37:57 by Hibernate Tools 3.4.0.CR1 -->
<hibernate-mapping>
<class name="com.dada.pojo.Test" table="T_REP_FORM" dynamic-insert="true" dynamic-update="true">
<id name="id" type="java.lang.Long">
<column name="id" />
</id>
<property name="name" type="java.lang.String">
<column name="NAME" />
</property>
<property name="birthday" type="java.util.Date">
<column name="birthday" />
</property>
</class>
</hibernate-mapping>