hibernate生成数据表

首先有个正确的hibernate.cfg.xml配置:

<?xml version="1.0" encoding="GBK"?>
<!-- 指定Hibernate配置文件的DTD信息 -->
<!DOCTYPE hibernate-configuration PUBLIC
        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<!-- hibernate- configuration是连接配置文件的根元素,配置会话工厂,hibernate的核心对象,管理数据库连接池

hibernate.cfg.xml中不支持db.properies配置,但可以用db.properties代替 hibernate.cfg.xml的配置-->
<hibernate-configuration>
    <session-factory>
<!--正向生成表时要加上这句话-->
        <property name="javax.persistence.validation.mode">none</property>

        <!-- 指定连接数据库所用的驱动 -->
        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
        <!-- 指定连接数据库的url,hibernate连接的数据库名 -->
        <property name="connection.url">jdbc:mysql://localhost:3306/shop?useUnicode=true&amp;characterEncoding=utf8&amp;serverTimezone=GMT%2B8&amp;useSSL=false</property>
        <!-- 指定连接数据库的用户名 -->
        <property name="connection.username">root</property>
        <property name="connection.password">root</property>
        <!-- 指定连接数据库的密码 -->
        <!-- 指定连接池里最大连接数 -->
        <property name="hibernate.c3p0.max_size">20</property>
        <!-- 指定连接池里最小连接数 -->
        <property name="hibernate.c3p0.min_size">1</property>
        <!-- 指定连接池里连接的超时时长 -->
        <property name="hibernate.c3p0.timeout">5000</property>
        <!-- 指定连接池里最大缓存多少个Statement对象 -->
        <property name="hibernate.c3p0.max_statements">100</property>
        <property name="hibernate.c3p0.idle_test_period">3000</property>
        <property name="hibernate.c3p0.acquire_increment">2</property>
        <property name="hibernate.c3p0.validate">true</property>
        <!-- 指定数据库方言 ,解决数据库之间的区别MySQLInnoDBDialect该配置会造成死锁-->
        <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
        <!-- <property name="dialect">org.hibernate.dialect.MySQLInnoDBDialect</property>-->
        <!-- 根据需要自动创建数据表 -->
        <property name="hbm2ddl.auto">update</property>
        <!-- 显示Hibernate持久化操作所生成的SQL -->
        <property name="show_sql">true</property>
        <!-- 将SQL脚本进行格式化后再输出 -->
        <property name="hibernate.format_sql">true</property>
        <!-- 罗列所有的映射文件 -->
        <mapping resource="cn/itcast/shop/adminuser/vo/AdminUser.hbm.xml"/>
        <mapping resource="cn/itcast/shop/category/vo/Category.hbm.xml"/>
        <mapping resource="cn/itcast/shop/categorysecond/vo/CategorySecond.hbm.xml"/>
        <mapping resource="cn/itcast/shop/order/vo/Order.hbm.xml"/>
        <mapping resource="cn/itcast/shop/order/vo/OrderItem.hbm.xml"/>
        <mapping resource="cn/itcast/shop/product/vo/Product.hbm.xml"/>
        <mapping resource="cn/itcast/shop/user/vo/User.hbm.xml"/>

    </session-factory>
</hibernate-configuration>

<property name="javax.persistence.validation.mode">none</property>

的配置非常重要,要是没有,ide就会不断的报找不到validati相关的校验类,很痛苦。【,javax.persistence.validation.mode默认情况下是auto的,就是说如果不设置的话它是会自动去你的classpath下面找一个bean-validation**包,但是找不到,所以beanvalitionFactory错误。

创建Table表的生成HibernateSchemaExport 类:

package cn.itcast.shop;
import java.io.File;

import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.hibernate.tool.hbm2ddl.SchemaExport;

public class HibernateSchemaExport {
static Session session;

static Configuration config = null;
static Transaction tx = null;

public static void main(String[] args) {

try {
config = new Configuration().configure(new File(
"src/hibernate.cfg.xml"));

System.out.println("Creating tables...");

SessionFactory sessionFactory = config.buildSessionFactory();
session = sessionFactory.openSession();
tx = session.beginTransaction();

SchemaExport schemaExport = new SchemaExport(config);
schemaExport.create(true, true);

System.out.println("Table created.");

tx.commit();

} catch (HibernateException e) {
e.printStackTrace();
try {
tx.rollback();
} catch (HibernateException e1) {
e1.printStackTrace();
}
} finally {

}
}

}

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转载自blog.csdn.net/qq_41063141/article/details/88707160