Hibernate3.3.2 手动配置annotation环境

简单记录Hibernate3.3.2如何快速配置环境

一、下载hibernate-distribution-3.3.2.GA-dist.zip文件，建立User libraries.

打开windows->preferences->JAVA->Build Path->User libraries。新建一个名为Hibernate的文件夹。然后添加hibernate-distribution-3.3.2.GA-dist.zip下的jar文件

第一个包在解压缩之后的文件夹下，剩下的JAR包除了倒数三个（用来配置DDL语句输出）和annotation包以外在lib->required文件夹下。

二、配置hibernate.cfg.xml配置文件(数据库为SqlServer2008 EXPRESS)

<?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.microsoft.sqlserver.jdbc.SQLServerDriver</property>
        <property name="connection.url">jdbc:sqlserver://localhost:1433; DatabaseName=hibernate</property>
        <property name="connection.username">aa</property>
        <property name="connection.password">aa</property>

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

        <!-- SQL dialect -->
        <property name="dialect">org.hibernate.dialect.SQLServerDialect</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>  

    </session-factory>

</hibernate-configuration>

　三）使用JAVABEAN的hbm.xml配置：

1、建立Student类

package com.huohuo.model;

public class Student {
	public int id;
	public String name;
	public int age;
	public String grade;

	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 int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
	public String getGrade() {
		return grade;
	}
	public void setGrade(String grade) {
		this.grade = grade;
	}

}

　　 2、配置Student.hbm.xml（注意该文件和Student类放在同一个文件夹下）

<?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">

<hibernate-mapping package="com.huohuo.model">

    <class name="Student" table="student">
        <id name="id" >
        </id>
        <property name="age"/>
        <property name="name"/>
        <property name="grade"/>

    </class>

</hibernate-mapping>

　　   3、在hibernate.cfg.xml加入这样一句话

<!-- 使用Student.hbm.xml  -->
 <mapping resource="com/huohuo/model/Student.hbm.xml"/>

配置完这三步以后，写一个测试类StudentTest.class

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

import com.huohuo.model.Student;

public class StudentTest {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub

		Student s1 = new Student();
		s1.setId(10);
		s1.setName("huohuo2");
		s1.setAge(23);
		s1.setGrade("二年级");

		Configuration cfg = new Configuration();
		SessionFactory sf = cfg.configure().buildSessionFactory();
		Session session = sf.openSession();
		session.beginTransaction();
		session.save(s1);

		session.getTransaction().commit();
		session.close();
		sf.close();
	}	

}

　　之后执行测试类，就会成功。以上几步是hibernate中自己写的类手动配置的步骤。

四）使用hibernate annotation配置方法（配置Annotaion文件）

加入两个包：

写一个Teacher类

package com.huohuo.model;

import javax.persistence.Entity;
import javax.persistence.Id;

@Entity
public class Teacher {
	public int id;
	public String name;
	public String title;

	@Id
	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;
	}

}

　　@是annotation的语法，@id表示主码

写一个测试类TeacherTest.class

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

import com.huohuo.model.Teacher;

public class TeacherTest {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub

		 Teacher t = new Teacher();
		 t.setId(3);
		 t.setName("huohuo");
		 t.setTitle("低级教师");

		Configuration cfg = new AnnotationConfiguration();
		SessionFactory sf = cfg.configure().buildSessionFactory();
		Session session = sf.openSession();
		session.beginTransaction();
		session.save(t);
		session.getTransaction().commit();
		session.close();
		sf.close();
	}

}

　在hibernate.cfg.xml中加入两行代码：

<!-- 使用hibernate_annotation自动配置 -->
<mapping class="com.huohuo.model.Teacher"/>

　　然后就可以直接运行了，省去了Teacher.hbm.xml映射的配置，方便很多。