3.把hbm转化为DDL有两种方式:第一种是ExportDB,执行ExportDB

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package com.bjpowernode.hibernate;import org.hibernate.cfg.Configuration;import org.hibernate.tool.hbm2ddl.SchemaExport;/** * 将hbm生成ddl * @author Administrator * */public class ExportDB {public static void main(String[] args) {//默认读取hibernate.cfg.xml文件Configuration cfg = new Configuration().configure();SchemaExport export = new SchemaExport(cfg);export.create(true, true);}}

drop table if exists User    drop table if exists User2    create table User (        id varchar(255) not null,        name varchar(255),        password varchar(255),        createTime datetime,        expireTime datetime,        primary key (id)    )    create table User2 (        id varchar(255) not null auto_increment,        name varchar(255),        password varchar(255),        createTime datetime,        expireTime datetime,        primary key (id)    )