1.加入Hibernate 3支持;
2.定义实体类;
3.创建实体类的映射文件;
4.通过配置文件hibernate.cfg.xml将映射文件加入到Hibernate中;
5.使用SchemaExport类创建数据库。
6.创建序列实现自增字段:
<id name="id" type="java.lang.Long">
<column name="ID" precision="22" scale="0" />
<generator class="sequence">
<param name="sequence">SEQ_HB_USER_ID</param>
</generator>
</id>
hibernate.cfg.xml:
程序代码
<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<!-- Generated by MyEclipse Hibernate Tools. -->
<hibernate-configuration>
<session-factory>
<property name="connection.username">scott</property>
<property name="connection.url">
jdbc:oracle:thin:@127.0.0.1:1521:MGC
</property>
<property name="dialect">
org.hibernate.dialect.Oracle9Dialect
</property>
<property name="myeclipse.connection.profile">MGC</property>
<property name="connection.password">tiger</property>
<property name="connection.driver_class">
oracle.jdbc.driver.OracleDriver
</property>
<mapping resource="cn/edu/ahau/mgc/hibernate/simple/pojo/User.hbm.xml" />
</session-factory>
</hibernate-configuration>
User.java:
程序代码
package cn.edu.ahau.mgc.hibernate.simple.pojo;
public class User {
private int id;
private String userName;
private String password;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
User.hbm.xml:
程序代码
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!--
Mapping file autogenerated by MyEclipse Persistence Tools
-->
<hibernate-mapping>
<class name="cn.edu.ahau.mgc.hibernate.simple.pojo.User" table="HB_USER" schema="SCOTT">
<id name="id" type="java.lang.Long">
<column name="ID" precision="22" scale="0" />
<generator class="sequence">
<param name="sequence">SEQ_HB_USER_ID</param>
</generator>
</id>
<property name="username" type="java.lang.String">
<column name="USERNAME" length="10" not-null="true" />
</property>
<property name="password" type="java.lang.String">
<column name="PASSWORD" length="10" not-null="true" />
</property>
</class>
</hibernate-mapping>
ExportToDB.java:
程序代码
package cn.edu.ahau.mgc.hibernate.simple.export;
import org.hibernate.cfg.Configuration;
import org.hibernate.tool.hbm2ddl.SchemaExport;
public class ExportToDB {
public static void main(String[] args) {
Configuration cfg = new Configuration().configure();
SchemaExport export = new SchemaExport(cfg);
export.create(true, true);
}
}