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hibernate3.0 dynamic-update="true" 无效,该如何解决

热度:432   发布时间:2016-04-24 01:29:25.0
hibernate3.0 dynamic-update="true" 无效
配置文件
XML code
<class     name="org.model.Customer"     table="customers"    lazy="false"    dynamic-update="true"    dynamic-insert="true">    <id        name="id"        type="java.lang.String"        column="ID"    >            <generator class="uuid.hex" />    </id>    <property        name="name"        type="java.lang.String"        column="NAME"        length="15"    />    <property        name="sex"        type="java.lang.String"        column="SEX"        length="1"    />    <property        name="description"        type="java.lang.String"        column="DESCRIPTION"        length="65535"    />    <!-- Associations -->      <!-- bi-directional one-to-many association to Order -->    <set        name="orders"        lazy="true"        inverse="true"        cascade="all"    >        <key>            <column name="CUSTOMER_ID" />        </key>                <one-to-many             class="org.model.Order"        />    </set></class>

java代码:
Java code
package test;import org.hibernate.Session;import org.hibernate.SessionFactory;import org.hibernate.Transaction;import org.hibernate.cfg.Configuration;import org.model.Customer;public class Test {    private static SessionFactory sessionFactory;    static{        sessionFactory = new Configuration().configure().buildSessionFactory();    }            public void createNewCustomer(Customer c){        Session sess = sessionFactory.openSession();        Transaction tx = sess.beginTransaction();        sess.save(c);        tx.commit();    }        public void updateCustomer(Customer c ){        Session sess = sessionFactory.openSession();        Transaction tx = sess.beginTransaction();        sess.update(c);        tx.commit();    }            public static void main(String[] args) {        Test t = new Test();        Customer c = new Customer();        c.setId("8a8482d51d18ec17011d18ec1a750001");        c.setDescription("sdfsdfdsfsdf");        t.updateCustomer(c);    }}


运行结果:
Hibernate: update customers set NAME=?, SEX=?, DESCRIPTION=? where ID=?
应该是update customers set DESCRIPTION=? where ID=? 这样才对吧

------解决方案--------------------
输出结果没错,因为你new了一个Customer c ,你并没有从数据库中load或者get这个实体,所以缓存上没有这个实体,session就根据id更新c中所有的属性
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