hibernate的 Annotation版Hello world

来源：互联网发布：淘宝上怎么找外卖编辑：程序博客网时间：2024/05/29 18:17

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;@Idpublic 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：我代码省略了包路径。

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。

0 0