hibernate3.2创建数据库Table

虽然hibernate3.2版本已经很旧了，但是为了适应某些场合的应用和了解下hibernate，来学习一下3.2版本！

1：添加hibernate的jar文件：

           hibernate根目录下面的:hibernate3.jar;

           hibernate/lib下面的全部jar文件;

2：手动copy，hibernate.cfg.xml:

<!DOCTYPE hibernate-configuration PUBLIC
	"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
	"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
	<session-factory>
		<!-- hibernate连接的url -->
		<property name="hibernate.connection.url">jdbc:mysql://localhost/hibernateTest</property>
		<!-- hibernate连接驱动 -->
		<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
		<!-- 数据库名字 -->
		<property name="hibernate.connection.username">root</property>
		<!-- 数据库密码 -->
		<property name="hibernate.connection.password">mysql</property>
		<!-- 数据库方言 -->
		<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
		<!-- 输出sql语句 -->
		<property name="show_sql">true</property>
		<!-- 找到实体类的文件 -->
		<mapping resource="cn/keith/hibernate/model/User.hbm.xml" />
	</session-factory>
</hibernate-configuration>

  

3：建立实体类，里面有user的属性，并给出set(),get()方法：

user.java:

package cn.keith.hibernate.model;

public class User {
	private String id;
	private String username;
	private String sex;
	private String mail;

	public String getId() {
		return id;
	}

	public void setId(String id) {
		this.id = id;
	}

	public String getUsername() {
		return username;
	}

	public void setUsername(String username) {
		this.username = username;
	}

	public String getSex() {
		return sex;
	}

	public void setSex(String sex) {
		this.sex = sex;
	}

	public String getMail() {
		return mail;
	}

	public void setMail(String mail) {
		this.mail = mail;
	}

}

 4:创建实体类相应的XXX.hbm.xml文件：

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC 
	"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
	"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
	<!-- 默认的表面会与实体类名相同 -->
	<class name="cn.keith.hibernate.model.User" >
	<!-- 设置主键，uuid不唯一 -->
		<id name="id">
			<generator class="uuid" />
		</id>
	<!-- 表里属性,默认的与表同名，也可修改用到column=""属性 -->
		<property name="username" />
		<property name="sex" />
		<property name="mail" />
	</class>

</hibernate-mapping>

 5:写测试类：TestDB.java:

package cn.keith.hibernate.model;

import org.hibernate.cfg.Configuration;
import org.hibernate.tool.hbm2ddl.SchemaExport;

public class TestDB {
	public static void main(String[] args) {
		// 读取hibernate配置文件
		Configuration cfg = new Configuration().configure();

		//将实体类转换为DDL语言,创建表
		SchemaExport export = new SchemaExport(cfg);

		export.create(true, true);
	}
}

 

如果Configuration cfg = new Configuration();会报：

Exception in thread "main" org.hibernate.HibernateException: The dialect was not set. Set the property hibernate.dialect.

 

错误！

 

*：数据库得自己创建，将配置在hibernate.cfg.xml的

<property name="hibernate.connection.url">jdbc:mysql://localhost/hibernateTest</property>

 

里！