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。
