第一個Hibernate案例

java代碼

package erchou;

import javax.net.ssl.SSLContext;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;

public class App {
   public static void main(String[] args) {
	Admin admin = new Admin();
	admin.setUserName("demo");
	admin.setPassword("123456");
	Configuration conig = new Configuration();
	conig.configure();
	//創建session工廠對象
	SessionFactory factory = conig.buildSessionFactory();
	//創建session(代表一個會話)
	Session session = factory.openSession();
	//開始事物
	Transaction tx = session.beginTransaction();
	//保存
	session.save(admin);
	//提交事務
	tx.commit();
	//關閉
	session.close();
	factory.close();
}
}

配置文件

1.類配置文件

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC 
	"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
	"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">

<hibernate-mapping package="erchou">
	
	<class name="Admin" table="Admin">
		
		<!-- 主鍵 ，映射-->
		<id name="id" column="id">
			<generator class="native"/>
		</id>
		
		<!-- 非主鍵，映射 -->
		<property name="userName" column="userName"></property>
		<property name="password" column="password"></property>
		
	</class>

</hibernate-mapping>

2.Hibernate配置文件

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

<hibernate-configuration>
	<!-- 通常，一個session-factory節點代表一個數據庫 -->
	<session-factory>
	
		<!-- 1. 數據庫連接配置 -->
		<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
		<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/day16</property>
		<property name="hibernate.connection.username">root</property>
		<property name="hibernate.connection.password">root</property>
		<!-- 
			數據庫方法配置， hibernate在運行的時候，會根據不同的方言生成符合當前數據庫語法的sql
		 -->
		<property name="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</property>
		
		
		<property name="hibernate.show_sql">true</property>
		<!-- 3. 加載所有映射 -->
		<mapping resource="erchou/Admin.hbm.xml"/>
	</session-factory>
</hibernate-configuration>