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Hibernate的Annotation版Hello world实例

本文实例讲述了Hibernate的Annotation版Hello world实现方法。分享给大家供大家参考,具体如下:

需要引入的包:hibernate-commons-annotations-4.0.4.Final.jar
由于我使用的是:hibernate-release-4.3.5.Final,在required目录下已经有了。

bean:

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
@Table(name="teacher")
public class Teacher {
  private int id;
  private String name;
  private String title;
  @Id
  public int getId() {
    return id;
  }
  public void setId(int id) {
    this.id = id;
  }
  @Column(name="name")
  public String getName() {
    return name;
  }
  public void setName(String name) {
    this.name = name;
  }
  @Column(name="title")
  public String getTitle() {
    return title;
  }
  public void setTitle(String title) {
    this.title = title;
  }
}

对应的hibernate.cfg.xml文件:

<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/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/hibernate</property>
    <property name="connection.username"></property>
    <property name="connection.password"></property>
    <!-- JDBC connection pool (use the built-in) -->
    <!--
    <property name="connection.pool_size">1</property>
     -->
    <!-- SQL dialect -->
    <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.internal.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">update</property>
    -->
    <mapping resource="com/hibernate/model/Student.hbm.xml"/>
    <mapping class="com.hibernate.model.Teacher"/>
  </session-factory>
</hibernate-configuration>

测试类:

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.cfg.Configuration;
import com.huxing.hibernate.model.Student;
import com.huxing.hibernate.model.Teacher;
public class StudentTest {
  public static void main(String[] args) {
    Student a = new Student();
    a.setId(123);
    a.setAge(32);
    a.setName("hello hibernate!");
    Teacher tea = new Teacher();
    tea.setId(4);
    tea.setName("mysql");
    tea.setTitle("high");
    Configuration cfg = new AnnotationConfiguration();
    SessionFactory cf = cfg.configure().buildSessionFactory();
    Session session = cf.openSession();
    session.beginTransaction();
    session.save(tea);
    session.getTransaction().commit();
    session.close();
    cf.close();
  }
}

注意:代码省略了包路径。

其他方面:

1.注解可以加在属性上,也可以加在get方法上。
2.注解的mapping和xml配置的xml的不同!一个是resource,一个是class。

希望本文所述对大家Hibernate框架程序设计有所帮助。

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