Annotation 的第一个工程

<?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">

<hibernate-configuration>

	<session-factory>

		<!-- Database connection settings -->
		<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
		<property name="connection.url">jdbc:mysql://localhost/annotation</property> <!-- annotation是数据库的名字 -->
		<property name="connection.username">root</property>
		<property name="connection.password">root</property>

		<!-- JDBC connection pool (use the built-in) -->
		<!-- <property name="connection.pool_size">1</property> -->

		<!-- SQL dialect(方言), 数据库的连接方式 -->
		<property name="dialect">org.hibernate.dialect.MySQLDialect</property>

		<!-- Enable Hibernate‘s automatic session context management -->
		<!-- <property name="current_session_context_class">thread</property> -->

		<!-- Disable the second-level cache -->
		<property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>

		<!-- Echo all executed SQL to stdout -->
		<property name="show_sql">true</property>

		<!-- Drop and re-create the database schema on startup -->
		<property name="hbm2ddl.auto">create</property>

		<mapping class="annotation.model.Teacher"/> <!-- 这个是Annotation的写法 -->

	</session-factory>

</hibernate-configuration>

package annotation.model;

/**
 * JDBC 是一个标准
 * MySql Driver/Oracle Driver 等都是 JDBC 的实现
 * 或者说 hibernate 是 JDBC 的实现
 */

import javax.persistence.Entity; // 从包名可以看出, 它不依赖hibernate
import javax.persistence.Id;

@Entity
public class Teacher {
	
	private int id;
	private String name;
	private String title;
	
	@Id // 把注解Id加到主键上
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getTitle() {
		return title;
	}
	public void setTitle(String title) {
		this.title = title;
	}
}

package annotation.test;

/**
 * 目前用 main 来测试
 */

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.cfg.Configuration;
import annotation.model.Teacher;

public class TeacherTest {
	
	public static void main(String[] args) {
		
		Teacher t = new Teacher();
		t.setId( 1 );
		t.setName( "I Love you" );
		t.setTitle( "高级" );
		
		Configuration cfg = new AnnotationConfiguration();
		SessionFactory sf = cfg.configure().buildSessionFactory();
		Session session = sf.openSession();
		
		// 在hibernate里面, 所有的操作都应放在事务里面
		session.beginTransaction();
		
		// 将数据保存到数据库里面
		session.save( t );
		
		// 提交数据
		session.getTransaction().commit();
		
		// 关掉数据库连接
		session.close();
		sf.close();
		
		String str = "\u4ea4\u6613\u6210\u529f";
		System.out.println( str );
	}
}